Built-In Methods

Author: suhailroushan13

10. Function-Methods/1. apply().js

@@ -0,0 +1,18 @@
+// function.apply
+
+const obj = {
+  name: "Suhail",
+  age: 20,
+  call() {
+    return `Name is ${this.name} and age is ${this.age}`;
+  },
+};
+
+const obj2 = {
+  name: "Roushan",
+  age: 22,
+};
+
+let data = obj.call.apply(obj2)
+console.log(data);
+

10. Function-Methods/2. bind().js

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+const first = {
+  name: "Suhail",
+  age: 20,
+  call() {
+    return `${this.name} and ${this.age}`;
+  },
+};
+
+const second = {
+  name: "Suhail",
+  age: 20,
+};
+
+let data = first.call.bind(second);
+console.log(data());

10. Function-Methods/3. call().js

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+const call = () => `Hello I am Suhail`;
+
+let data = call.call();
+console.log(data);

10. Function-Methods/4. name().js

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+function name() {
+  console.log("I am Function Name ");
+}
+
+let data = name.name;
+console.log(data);

10. Function-Methods/5. length.js

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+function number(a, b, c) {
+  console.log(a, b, c);
+}
+
+let data = number.length;
+
+console.log(data); // 3
+
+function odd(a, b = 10, c) {
+  console.log(a, b, c);
+}
+
+data = odd.length;
+
+console.log(data); // 1
+
+/*
+a=11,b,c ===> 0
+a,b=11,c ===> 1
+a,b,c=10 ===> 2
+
+//  It always count from first
+
+*/

10. Function-Methods/6. toString().js

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+function Suhail() {
+  return "Hey Everyone";
+}
+
+console.log(Suhail.toString());
+
+
+
+// Output:-
+// function Suhail() {
+//   return "Hey Everyone";
+// }

11. Number-Methods/1. isFinite().js

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+let number = 775;
+console.log(isFinite(number)); // true
+
+let number2 = "745533e3";
+console.log(isFinite(number2)); // true
+
+let number3 = 745533e3;
+console.log(isFinite(number3)); // true
+console.log(isFinite(null)); // true
+
+console.log(isFinite(NaN)); // false
+console.log(isFinite(-Infinity)); // false
+console.log(isFinite(+Infinity)); // false
+console.log(isFinite(undefined)); // false

11. Number-Methods/2. isInteger().js

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+console.log(Number.isInteger(123)); // true
+console.log(Number.isInteger(3473.345)); // false
+console.log(Number.isInteger("873")); // false
+console.log(Number.isInteger(1e1)); // true
+
+console.log(Number.isInteger(5.0)); // true; 5.0 == 5
+console.log(Number.isInteger(0.5)); // false 0.5 
+

11. Number-Methods/3. parseFloat().js

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+// String to Number
+
+let data = "123";
+let change = Number.parseFloat(data);
+console.log(typeof change,change);
+
+let data2 = "123e4";
+ change = Number.parseFloat(data2);
+console.log(typeof change, change);
+
+
+let data3 = "d234eNde";
+change = Number.parseFloat(data3);
+console.log(typeof change, change);
+
+
+let data4 = "234eNde";
+change = Number.parseFloat(data4);
+console.log(typeof change, change);

11. Number-Methods/4. parseInt().js

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+let number = 0000;
+console.log(parseInt(number,2));
+
+
+number = 0001;
+console.log(parseInt(number,2));
+
+number = " 0xF"
+console.log(parseInt(number, 16));