letvaluesArray1=a.reduce(function(a,c){a[c.value]=c.value;returna;},{});letvaluesArray2=b.reduce(function(a,c){a[c.value]=c.value;returna;},{});varresult=a.filter(function(c){return!valuesArray2[c.value];}).concat(b.filter(function(c){return!valuesArray1[c.value];}));con...
constvalue=12345;// Concat Empty Stringvalue+'';// Template Strings`${value}`;// JSON.stringifyJSON.stringify(value);// toString()value.toString();// String()String(value);// RESULT// '12345' #Comparing the 5 ways Alright, let's test the 5 ways with different values. Here are the ...
stream: { [key: string]: boolean }; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 让我们创建函数: AI检测代码解析 function objFilter(objA: Data, objB: Data): Data { let out: Data = { stream: {} }; Object.keys(objA.stream).filter((value, idx) => Object.values(objA.stre...
Disallows duplicate property names or parameter values.Strict mode throws an error when it detects a duplicate named property in an object (e.g.,var object = {foo: "bar", foo: "baz"};) or a duplicate named argument for a function (e.g.,function foo(val1, val2, val1){}), thereby...
The solution is to write a compare function to compare the property values: Example cars.sort(function(a, b){returna.year- b.year}); Try it Yourself » Comparing string properties is a little more complex: Example cars.sort(function(a, b){ ...
The equality operators (== and !=) convert both operands to the same type before comparing their values. For example, console.log(3 == "3"); // true Run Code Here, we used the == operator to compare the number 3 and the string 3. By default, JavaScript converts string 3 to numb...
Normally, JavaScript strings are primitive values, created from literals: letx ="John"; But strings can also be defined as objects with the keywordnew: lety =newString("John"); Example letx ="John"; lety =newString("John"); Try it Yourself » ...
According to the ECMAScript specification, JavaScript includes both strict (===) and loose (==) equality operators, which behave differently when comparing values. Here's a breakdown:== (Loose Equality): This operator performs type coercion before comparing two values. If the values are of ...
Comparison operators are used in logical statements to determine equality or difference between variables or values. Given that x = 5, the table below explains the comparison operators:OperatorDescriptionComparingReturnsTry it == equal to x == 8 false Try it »...
> typeof 'abc' // a primitive value 'string' > typeof new String('abc') // an object 'object' > 'abc' instanceof String // never true for primitives false > 'abc' === new String('abc') false Wrapper instances are objects, and there is no way of comparing objects in JavaScrip...