Commit 79f16c2

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Swastikyadav

committed

Added polyfills for call, apply, and bind methods

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Lines changed: 27 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,27 @@`
	`1`	`+/*`
	`2`	`+ - Write a polyfill for JavaScript's native apply method.`
	`3`	`+*/`
	`4`	`+`
	`5`	`+let obj = {`
	`6`	`+ firstName: "Swastik",`
	`7`	`+ lastName: "Yadav",`
	`8`	+ // fn() {console.log(`I am ${this.firstName} ${this.lastName}`)} - This is to be achieved.
	`9`	`+}`
	`10`	`+`
	`11`	`+function printName(city, country) {`
	`12`	+ console.log(`I am ${this.firstName} ${this.lastName} from ${city} ${country}`);
	`13`	`+}`
	`14`	`+`
	`15`	`+// Native apply method.`
	`16`	`+printName.apply(obj, ["Delhi", "India"]);`
	`17`	`+`
	`18`	`+// Solution`
	`19`	`+Function.prototype.polyApply = function(context, args) {`
	`20`	`+ // 'this' points to printName function`
	`21`	`+ context.fn = this;`
	`22`	`+`
	`23`	`+ return context.fn(...args);`
	`24`	`+}`
	`25`	`+`
	`26`	`+// Using polyApply method.`
	`27`	`+printName.polyApply(obj, ["Delhi", "India"]);`

Lines changed: 31 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,31 @@`
	`1`	`+/*`
	`2`	`+ - Write a polyfill for JavaScript's native bind method.`
	`3`	`+*/`
	`4`	`+`
	`5`	`+let obj = {`
	`6`	`+ firstName: "Swastik",`
	`7`	`+ lastName: "Yadav",`
	`8`	+ // fn() {console.log(`I am ${this.firstName} ${this.lastName}`)} - This is to be achieved.
	`9`	`+}`
	`10`	`+`
	`11`	`+function printName(city, country) {`
	`12`	+ console.log(`I am ${this.firstName} ${this.lastName} from ${city} ${country}`);
	`13`	`+}`
	`14`	`+`
	`15`	`+// Native bind method.`
	`16`	`+const nativePrintNameBind = printName.bind(obj);`
	`17`	`+nativePrintNameBind("Delhi", "India");`
	`18`	`+`
	`19`	`+// Solution`
	`20`	`+Function.prototype.polyBind = function(context, ...args) {`
	`21`	`+ // 'this' points to printName function`
	`22`	`+ let callback = this;`
	`23`	`+`
	`24`	`+ return function(...args2) {`
	`25`	`+ callback.apply(context, [...args, ...args2]);`
	`26`	`+ };`
	`27`	`+}`
	`28`	`+`
	`29`	`+// Using polyBind method.`
	`30`	`+const polyPrintNameBind = printName.polyBind(obj);`
	`31`	`+polyPrintNameBind("Delhi", "India");`

Lines changed: 27 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,27 @@`
	`1`	`+/*`
	`2`	`+ - Write a polyfill for JavaScript's native call method.`
	`3`	`+*/`
	`4`	`+`
	`5`	`+let obj = {`
	`6`	`+ firstName: "Swastik",`
	`7`	`+ lastName: "Yadav",`
	`8`	+ // fn() {console.log(`I am ${this.firstName} ${this.lastName}`)} - This is to be achieved.
	`9`	`+}`
	`10`	`+`
	`11`	`+function printName(city, country) {`
	`12`	+ console.log(`I am ${this.firstName} ${this.lastName} from ${city} ${country}`);
	`13`	`+}`
	`14`	`+`
	`15`	`+// Native call method.`
	`16`	`+printName.call(obj, "Delhi", "India");`
	`17`	`+`
	`18`	`+// Solution`
	`19`	`+Function.prototype.polyCall = function(context, ...args) {`
	`20`	`+ // 'this' points to printName function`
	`21`	`+ context.fn = this;`
	`22`	`+`
	`23`	`+ return context.fn(...args);`
	`24`	`+}`
	`25`	`+`
	`26`	`+// Using polyCall method.`
	`27`	`+printName.polyCall(obj, "Delhi", "India");`

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