// Deep compare objects. var keys = _.keys(a), key; size = keys.length; // Ensure that both objects contain the same number of properties before comparing deep equality. result = _.keys(b).length === size; if (result) { while (size--) { // Deep compare each member key = key...
//check if value is primitive function isPrimitive(obj) { return (obj !== Object(obj)); } 顺便说一下,有一个 deep equal 的作弊版本,就像一个魅力))但是,它慢了大约 1.6 倍。 正如zero298 所注意到的,这种方法对属性排序很敏感,不应该被认真对待 function cheatDeepEqual(obj1, obj2) { return JS...
This method will check for strict equality on leaf nodes. It will return undefined if the operands are equal and will throw an error if they are not deep and strictly equal. const assert = require('assert'); const person1 = { "firstName": "John", "lastName": "Doe", "age": 35...
Also note that the JavaScript does not guarantee for the keys to be in a particular order, though in practice the order is consistent. Reference equality, shallow equality and deep equality First of all, let’s look at why we need a deep comparison instead of just using===. In this exam...
相等性比较 (Equality Comparisons): 使用非严格相等 (==) 比较时,null 和undefined 是相等的。 使用严格相等 (===) 比较时,null 和undefined 是不相等的。 null == undefined; // true null === undefined; // false 特性undefinednull 类型 undefined object (实际上应该是 Null) 含义 未定义,缺少值 ...
Checking deep equality for objects (maybe: optionally parameterize with a predicate, to support custom data structures): assert.equal( {foo: ['a', 'b']} === {foo: ['a', 'b']}, false); assert.equal( deepEqual({foo: ['a', 'b']}, {foo: ['a', 'b']}), true); Enums:...
You cannot check objects for equality: two objects are never equal to each other. The only case when a check might be true is if two variables reference the same object.Some peculiarities to be aware: NaN is always different from NaN....
RapydScript JavaScript == deep equality (JS has no equivalent) != deep inequality (JS has no equivalent) and && or || not ! is === is not !== +=1 ++ -=1 -- ** Math.pow() // floor division Admittedly, is is not exactly the same thing in Python as === in JavaScript, ...
[强制] 在 Equality Expression 中使用类型严格的 ===。仅当判断 null 或 undefined 时,允许使用 == null。 解释: 使用=== 可以避免等于判断中隐式的类型转换。 // goodif (age ===30) {// ...}// badif (age ==30) {// ...} [建议] 尽...
UTF-8 编码具有更广泛的适应性。BOM 在使用程序或工具处理文件时可能造成不必要的干扰。 [建议] 在文件结尾处,保留一个空行。 2.2 结构 2.2.1 缩进 [强制] 使用 4 个空格做为一个缩进层级,不允许使用 2 个空格 或 tab [强制] switch 下的 case 和 default ...