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* first action! (#1)
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480
node_modules/jju/lib/document.js
generated
vendored
Normal file
480
node_modules/jju/lib/document.js
generated
vendored
Normal file
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@ -0,0 +1,480 @@
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var assert = require('assert')
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var tokenize = require('./parse').tokenize
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var stringify = require('./stringify').stringify
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var analyze = require('./analyze').analyze
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function isObject(x) {
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return typeof(x) === 'object' && x !== null
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}
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function value_to_tokenlist(value, stack, options, is_key, indent) {
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options = Object.create(options)
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options._stringify_key = !!is_key
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if (indent) {
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options._prefix = indent.prefix.map(function(x) {
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return x.raw
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}).join('')
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}
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if (options._splitMin == null) options._splitMin = 0
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if (options._splitMax == null) options._splitMax = 0
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var stringified = stringify(value, options)
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if (is_key) {
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return [ { raw: stringified, type: 'key', stack: stack, value: value } ]
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}
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options._addstack = stack
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var result = tokenize(stringified, {
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_addstack: stack,
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})
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result.data = null
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return result
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}
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// '1.2.3' -> ['1','2','3']
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function arg_to_path(path) {
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// array indexes
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if (typeof(path) === 'number') path = String(path)
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if (path === '') path = []
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if (typeof(path) === 'string') path = path.split('.')
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if (!Array.isArray(path)) throw Error('Invalid path type, string or array expected')
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return path
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}
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// returns new [begin, end] or false if not found
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//
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// {x:3, xxx: 111, y: [111, {q: 1, e: 2} ,333] }
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// f('y',0) returns this B^^^^^^^^^^^^^^^^^^^^^^^^E
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// then f('1',1) would reduce it to B^^^^^^^^^^E
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function find_element_in_tokenlist(element, lvl, tokens, begin, end) {
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while(tokens[begin].stack[lvl] != element) {
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if (begin++ >= end) return false
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}
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while(tokens[end].stack[lvl] != element) {
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if (end-- < begin) return false
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}
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return [begin, end]
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}
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function is_whitespace(token_type) {
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return token_type === 'whitespace'
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|| token_type === 'newline'
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|| token_type === 'comment'
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}
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function find_first_non_ws_token(tokens, begin, end) {
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while(is_whitespace(tokens[begin].type)) {
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if (begin++ >= end) return false
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}
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return begin
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}
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function find_last_non_ws_token(tokens, begin, end) {
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while(is_whitespace(tokens[end].type)) {
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if (end-- < begin) return false
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}
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return end
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}
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/*
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* when appending a new element of an object/array, we are trying to
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* figure out the style used on the previous element
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*
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* return {prefix, sep1, sep2, suffix}
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*
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* ' "key" : "element" \r\n'
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* prefix^^^^ sep1^ ^^sep2 ^^^^^^^^suffix
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*
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* begin - the beginning of the object/array
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* end - last token of the last element (value or comma usually)
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*/
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function detect_indent_style(tokens, is_array, begin, end, level) {
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var result = {
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sep1: [],
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sep2: [],
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suffix: [],
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prefix: [],
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newline: [],
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}
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if (tokens[end].type === 'separator' && tokens[end].stack.length !== level+1 && tokens[end].raw !== ',') {
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// either a beginning of the array (no last element) or other weird situation
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//
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// just return defaults
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return result
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}
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// ' "key" : "value" ,'
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// skipping last separator, we're now here ^^
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if (tokens[end].type === 'separator')
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end = find_last_non_ws_token(tokens, begin, end - 1)
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if (end === false) return result
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// ' "key" : "value" ,'
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// skipping value ^^^^^^^
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while(tokens[end].stack.length > level) end--
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if (!is_array) {
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while(is_whitespace(tokens[end].type)) {
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if (end < begin) return result
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if (tokens[end].type === 'whitespace') {
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result.sep2.unshift(tokens[end])
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} else {
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// newline, comment or other unrecognized codestyle
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return result
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}
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end--
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}
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// ' "key" : "value" ,'
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// skipping separator ^
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assert.equal(tokens[end].type, 'separator')
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assert.equal(tokens[end].raw, ':')
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while(is_whitespace(tokens[--end].type)) {
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if (end < begin) return result
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if (tokens[end].type === 'whitespace') {
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result.sep1.unshift(tokens[end])
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} else {
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// newline, comment or other unrecognized codestyle
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return result
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}
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}
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assert.equal(tokens[end].type, 'key')
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end--
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}
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// ' "key" : "value" ,'
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// skipping key ^^^^^
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while(is_whitespace(tokens[end].type)) {
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if (end < begin) return result
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if (tokens[end].type === 'whitespace') {
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result.prefix.unshift(tokens[end])
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} else if (tokens[end].type === 'newline') {
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result.newline.unshift(tokens[end])
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return result
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} else {
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// comment or other unrecognized codestyle
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return result
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}
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end--
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}
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return result
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}
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function Document(text, options) {
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var self = Object.create(Document.prototype)
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if (options == null) options = {}
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//options._structure = true
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var tokens = self._tokens = tokenize(text, options)
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self._data = tokens.data
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tokens.data = null
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self._options = options
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var stats = analyze(text, options)
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if (options.indent == null) {
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options.indent = stats.indent
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}
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if (options.quote == null) {
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options.quote = stats.quote
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}
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if (options.quote_keys == null) {
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options.quote_keys = stats.quote_keys
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}
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if (options.no_trailing_comma == null) {
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options.no_trailing_comma = !stats.has_trailing_comma
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}
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return self
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}
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// return true if it's a proper object
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// throw otherwise
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function check_if_can_be_placed(key, object, is_unset) {
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//if (object == null) return false
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function error(add) {
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return Error("You can't " + (is_unset ? 'unset' : 'set') + " key '" + key + "'" + add)
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}
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if (!isObject(object)) {
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throw error(' of an non-object')
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}
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if (Array.isArray(object)) {
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// array, check boundary
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if (String(key).match(/^\d+$/)) {
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key = Number(String(key))
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if (object.length < key || (is_unset && object.length === key)) {
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throw error(', out of bounds')
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} else if (is_unset && object.length !== key+1) {
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throw error(' in the middle of an array')
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} else {
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return true
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}
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} else {
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throw error(' of an array')
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}
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} else {
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// object
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return true
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}
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}
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// usage: document.set('path.to.something', 'value')
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// or: document.set(['path','to','something'], 'value')
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Document.prototype.set = function(path, value) {
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path = arg_to_path(path)
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// updating this._data and check for errors
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if (path.length === 0) {
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if (value === undefined) throw Error("can't remove root document")
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this._data = value
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var new_key = false
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} else {
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var data = this._data
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for (var i=0; i<path.length-1; i++) {
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check_if_can_be_placed(path[i], data, false)
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data = data[path[i]]
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}
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if (i === path.length-1) {
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check_if_can_be_placed(path[i], data, value === undefined)
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}
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var new_key = !(path[i] in data)
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if (value === undefined) {
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if (Array.isArray(data)) {
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data.pop()
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} else {
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delete data[path[i]]
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}
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} else {
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data[path[i]] = value
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}
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}
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// for inserting document
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if (!this._tokens.length)
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this._tokens = [ { raw: '', type: 'literal', stack: [], value: undefined } ]
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var position = [
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find_first_non_ws_token(this._tokens, 0, this._tokens.length - 1),
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find_last_non_ws_token(this._tokens, 0, this._tokens.length - 1),
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]
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for (var i=0; i<path.length-1; i++) {
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position = find_element_in_tokenlist(path[i], i, this._tokens, position[0], position[1])
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if (position == false) throw Error('internal error, please report this')
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}
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// assume that i == path.length-1 here
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if (path.length === 0) {
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var newtokens = value_to_tokenlist(value, path, this._options)
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// all good
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} else if (!new_key) {
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// replace old value with a new one (or deleting something)
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var pos_old = position
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position = find_element_in_tokenlist(path[i], i, this._tokens, position[0], position[1])
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if (value === undefined && position !== false) {
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// deleting element (position !== false ensures there's something)
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var newtokens = []
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if (!Array.isArray(data)) {
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// removing element from an object, `{x:1, key:CURRENT} -> {x:1}`
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// removing sep, literal and optional sep
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// ':'
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var pos2 = find_last_non_ws_token(this._tokens, pos_old[0], position[0] - 1)
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assert.equal(this._tokens[pos2].type, 'separator')
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assert.equal(this._tokens[pos2].raw, ':')
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position[0] = pos2
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// key
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var pos2 = find_last_non_ws_token(this._tokens, pos_old[0], position[0] - 1)
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assert.equal(this._tokens[pos2].type, 'key')
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assert.equal(this._tokens[pos2].value, path[path.length-1])
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position[0] = pos2
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}
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// removing comma in arrays and objects
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var pos2 = find_last_non_ws_token(this._tokens, pos_old[0], position[0] - 1)
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assert.equal(this._tokens[pos2].type, 'separator')
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if (this._tokens[pos2].raw === ',') {
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position[0] = pos2
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} else {
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// beginning of the array/object, so we should remove trailing comma instead
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pos2 = find_first_non_ws_token(this._tokens, position[1] + 1, pos_old[1])
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assert.equal(this._tokens[pos2].type, 'separator')
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if (this._tokens[pos2].raw === ',') {
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position[1] = pos2
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}
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}
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} else {
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var indent = pos2 !== false
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? detect_indent_style(this._tokens, Array.isArray(data), pos_old[0], position[1] - 1, i)
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: {}
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var newtokens = value_to_tokenlist(value, path, this._options, false, indent)
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}
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} else {
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// insert new key, that's tricky
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var path_1 = path.slice(0, i)
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// find a last separator after which we're inserting it
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var pos2 = find_last_non_ws_token(this._tokens, position[0] + 1, position[1] - 1)
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assert(pos2 !== false)
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var indent = pos2 !== false
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? detect_indent_style(this._tokens, Array.isArray(data), position[0] + 1, pos2, i)
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: {}
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var newtokens = value_to_tokenlist(value, path, this._options, false, indent)
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// adding leading whitespaces according to detected codestyle
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var prefix = []
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if (indent.newline && indent.newline.length)
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prefix = prefix.concat(indent.newline)
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if (indent.prefix && indent.prefix.length)
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prefix = prefix.concat(indent.prefix)
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// adding '"key":' (as in "key":"value") to object values
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if (!Array.isArray(data)) {
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prefix = prefix.concat(value_to_tokenlist(path[path.length-1], path_1, this._options, true))
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if (indent.sep1 && indent.sep1.length)
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prefix = prefix.concat(indent.sep1)
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prefix.push({raw: ':', type: 'separator', stack: path_1})
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if (indent.sep2 && indent.sep2.length)
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prefix = prefix.concat(indent.sep2)
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}
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newtokens.unshift.apply(newtokens, prefix)
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// check if prev token is a separator AND they're at the same level
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if (this._tokens[pos2].type === 'separator' && this._tokens[pos2].stack.length === path.length-1) {
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// previous token is either , or [ or {
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if (this._tokens[pos2].raw === ',') {
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// restore ending comma
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newtokens.push({raw: ',', type: 'separator', stack: path_1})
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}
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} else {
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// previous token isn't a separator, so need to insert one
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newtokens.unshift({raw: ',', type: 'separator', stack: path_1})
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}
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if (indent.suffix && indent.suffix.length)
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newtokens.push.apply(newtokens, indent.suffix)
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assert.equal(this._tokens[position[1]].type, 'separator')
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position[0] = pos2+1
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position[1] = pos2
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}
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newtokens.unshift(position[1] - position[0] + 1)
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newtokens.unshift(position[0])
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this._tokens.splice.apply(this._tokens, newtokens)
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return this
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}
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// convenience method
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Document.prototype.unset = function(path) {
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return this.set(path, undefined)
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}
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Document.prototype.get = function(path) {
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path = arg_to_path(path)
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var data = this._data
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for (var i=0; i<path.length; i++) {
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if (!isObject(data)) return undefined
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data = data[path[i]]
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}
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return data
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}
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Document.prototype.has = function(path) {
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path = arg_to_path(path)
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var data = this._data
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for (var i=0; i<path.length; i++) {
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if (!isObject(data)) return false
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data = data[path[i]]
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}
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return data !== undefined
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}
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// compare old object and new one, and change differences only
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Document.prototype.update = function(value) {
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var self = this
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change([], self._data, value)
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return self
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function change(path, old_data, new_data) {
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if (!isObject(new_data) || !isObject(old_data)) {
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// if source or dest is primitive, just replace
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if (new_data !== old_data)
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self.set(path, new_data)
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} else if (Array.isArray(new_data) != Array.isArray(old_data)) {
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// old data is an array XOR new data is an array, replace as well
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self.set(path, new_data)
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} else if (Array.isArray(new_data)) {
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// both values are arrays here
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if (new_data.length > old_data.length) {
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// adding new elements, so going forward
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for (var i=0; i<new_data.length; i++) {
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path.push(String(i))
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change(path, old_data[i], new_data[i])
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path.pop()
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}
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} else {
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// removing something, so going backward
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for (var i=old_data.length-1; i>=0; i--) {
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path.push(String(i))
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change(path, old_data[i], new_data[i])
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path.pop()
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}
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}
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} else {
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// both values are objects here
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for (var i in new_data) {
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path.push(String(i))
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change(path, old_data[i], new_data[i])
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path.pop()
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}
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|
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for (var i in old_data) {
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if (i in new_data) continue
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path.push(String(i))
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change(path, old_data[i], new_data[i])
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path.pop()
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}
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}
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}
|
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}
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Document.prototype.toString = function() {
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return this._tokens.map(function(x) {
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return x.raw
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}).join('')
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}
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module.exports.Document = Document
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module.exports.update = function updateJSON(source, new_value, options) {
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return Document(source, options).update(new_value).toString()
|
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}
|
||||
|
||||
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