Underscore和Lo-Dash有一个名为_.isEqual()方法,用来比较好的处理深度对象的比较。 // Outputs: trueconsole.log(_.isEqual(obj0,obj1));// Underscore中isEqual的部分源码vareq=function(a,b,aStack,bStack){// Identical objects are equal. `0 === -0`, but they aren't identical.// See the ...
Lightweight and simple Javascript tool to compare equality with objects, arrays and other Javascript object types. - sonofjavascript/js-compare
Few things to note though, it won’t work with nested objects and the order of the keys are important. The idea behind this is similar to the stringify way. It coverts the object into a string and compare if the strings are a match. Essentially it's comparing the equality of two ...
you'll have to check the properties or elements individually for equality or identity. (And, if any of the properties or elements are themselves objects or arrays, you'll have to decide how deep you want the comparison to go.)
// Deep compare objects. //对比纯对象。 varkeys = _.keys(a), key; length = keys.length; // Ensure that both objects contain the same number of properties before comparing deep equality. //对比属性数量,如果数量不等,直接返回false。
Checking for equality with JSON.stringify Another way to compare two objects is to convert them to JSON and check if the resulting strings are equal: functionjsonEqual(a,b){returnJSON.stringify(a)===JSON.stringify(b);}jsonEqual(user1,user2)// true in all three cases above ...
for any numberx. Thus equality is not reflexive in JavaScript, becauseNaNis not equal to itself. Two booleans, two strings (primitive): obvious results Two objects (including arrays and functions):x === yonly ifxand y are the same object(!). That is, if you want to compare different ...
Another way to check for array equality is to replace theevery()method with theforloop and use theindexOf()method to see if theindexOf()the first array elements are not-1inside the second array. First, you need to create theresultvariable withfalseas its initial value: ...
Comparison Operators & Equality15.1 Use === and !== over == and !=. eslint: eqeqeq 15.2 Conditional statements such as the if statement evaluate their expression using coercion with the ToBoolean abstract method and always follow these simple rules: Objects evaluate to true Undefined evaluates...
The 64-bit library type is a JavaScript object and not a value type such as a JavaScript number. This has some implications for comparison operations. Normally, equality (==) on an object would indicate that operands refer to the same object and not the same value. The JavaScript provider ...