diff options
Diffstat (limited to 'deps/npm/node_modules/fast-deep-equal/index.js')
-rw-r--r-- | deps/npm/node_modules/fast-deep-equal/index.js | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/deps/npm/node_modules/fast-deep-equal/index.js b/deps/npm/node_modules/fast-deep-equal/index.js new file mode 100644 index 0000000000..7aaaba3f6c --- /dev/null +++ b/deps/npm/node_modules/fast-deep-equal/index.js @@ -0,0 +1,55 @@ +'use strict'; + +var isArray = Array.isArray; +var keyList = Object.keys; +var hasProp = Object.prototype.hasOwnProperty; + +module.exports = function equal(a, b) { + if (a === b) return true; + + var arrA = isArray(a) + , arrB = isArray(b) + , i + , length + , key; + + if (arrA && arrB) { + length = a.length; + if (length != b.length) return false; + for (i = 0; i < length; i++) + if (!equal(a[i], b[i])) return false; + return true; + } + + if (arrA != arrB) return false; + + var dateA = a instanceof Date + , dateB = b instanceof Date; + if (dateA != dateB) return false; + if (dateA && dateB) return a.getTime() == b.getTime(); + + var regexpA = a instanceof RegExp + , regexpB = b instanceof RegExp; + if (regexpA != regexpB) return false; + if (regexpA && regexpB) return a.toString() == b.toString(); + + if (a instanceof Object && b instanceof Object) { + var keys = keyList(a); + length = keys.length; + + if (length !== keyList(b).length) + return false; + + for (i = 0; i < length; i++) + if (!hasProp.call(b, keys[i])) return false; + + for (i = 0; i < length; i++) { + key = keys[i]; + if (!equal(a[key], b[key])) return false; + } + + return true; + } + + return false; +}; |