replaceValue), wheresearchValueis the substring you want to replace (it can be a string or a regular expression), andreplaceValueis the new string to insert. This method is especially handy for tasks like updating multiple instances
Compare<N, M>: Compares two number typesNandMand returns a number indicating their relative order. GreaterThan<N, M>: Checks if the number typeNis greater thanM. GreaterThanOrEqual<N, M>: Checks if the number typeNis greater than or equal toM. ...
When generic parameters of a generic type are not specified, all generic parameters are compared as any. Then compare with the result type, as in the first example above. let identity=function<T>(x:T):T{} let reverse=function<U>(y:U):U{} identity=reverse; 1. 2. 3. 在TypeScript里...
In TypeScript (or JavaScript), we can compare the two variables with either equality operator (‘==’) or strict equality operator (‘===’). Both comparison operators seems almost similar; but the way, they compare two given variables, is very different. The equality operator compares only...
feature1)thrownewError('feature1 is required');if(!feature2)thrownewError('feature2 is required');vartype1 =getType(feature1);vartype2 =getType(feature2);if(type1 !== type2)returnfalse;varequality =newGeojsonEquality({precision:6});returnequality.compare(cleanCoords(feature1), cleanCoords(...
constFoo=Symbol();constBar=Symbol();// Error: can't compare two unique symbols.if(Foo===Bar) {// ...} Other potential use-cases include using symbols for tagged unions. Copy // ./ShapeKind.tsexportconstCircle=Symbol("circle");exportconstSquare=Symbol("square");// ./ShapeFun.tsimpor...
function compare(a: string, b: string): -1 | 0 | 1 { return a === b ? 0 : a > b ? 1 : -1; }也可以将这些与非文字类型结合使用:interface Options { width: number; } function configure(x: Options | "auto") { // ... } configure({ width: 100 }); configure("auto"); ...
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exporttypecheckForBadArgs<Arg>=Argextendsany[]?"You cannot compare two arrays using deepEqualCompare":Arg;constdeepEqualCompare=<Textendsany>(a:checkForBadArgs<T>,b:checkForBadArgs<T>):boolean|Error=>{if(Array.isArray(a)||Array.isArray(b)){thrownewError("You cannot compare two arrays usi...
It can then be used to compare strings in conditional statements like this: enumWeekend{Friday='FRIDAY',Saturday='SATURDAY',Sunday='SUNDAY'}constvalue=someString asWeekend;if(value===Weekend.Friday||value===Weekend.Sunday){console.log('You choose a weekend');console.log(value);} ...