JavaScript Rest and Spread Operator The Complete Guide: Thread 🧵

codemarch's tweet image. JavaScript Rest and Spread Operator

The Complete Guide:

Thread 🧵

a. Definition of Rest Parameter

codemarch's tweet image. a. Definition of Rest Parameter

b. Syntax of Rest Parameter

codemarch's tweet image. b. Syntax of Rest Parameter

c. Without Rest Parameter. ➡️It will not handle all the parameters which has been passed.

codemarch's tweet image. c. Without Rest Parameter.

➡️It will not handle all the parameters which has been passed.

d. Rest Example.

codemarch's tweet image. d. Rest Example.
codemarch's tweet image. d. Rest Example.

e. Why It is known as Rest Parameter ? ➡️In this Example they collect all the remaining value and stored in 'others' arrays. So it is known as Rest Parameter. ⬇️See the Example

codemarch's tweet image. e. Why It is known as Rest Parameter ?

➡️In this Example they collect all the remaining value and stored in 'others' arrays. So it is known as Rest Parameter. 

⬇️See the Example

f. Rest parameter in a dynamic function. ➡️JavaScript allows us to create dynamic functions by using the function constructor. We can use the rest parameter within a dynamic function.

codemarch's tweet image. f. Rest parameter in a dynamic function.

➡️JavaScript allows us to create dynamic functions by using the function constructor. We can use the rest parameter within a dynamic function.

2 . Spread Operator a. Definition :

codemarch's tweet image. 2 . Spread Operator

a. Definition :

b. Spread parameter 's Example.

codemarch's tweet image. b. Spread parameter 's Example.

c. Spread Operator and Array Manipulation ➡️Here, we are going to see how we can manipulate an array by using the spread operator.

codemarch's tweet image. c. Spread Operator and Array Manipulation

➡️Here, we are going to see how we can manipulate an array by using the spread operator.

d. Concatenating arrays ➡️Spread operator can also be used to concatenate two or more arrays.

codemarch's tweet image. d. Concatenating arrays

➡️Spread operator can also be used to concatenate two or more arrays.

e. Copying an array. ➡️We can also copy the instance of an array by using the spread operator.

codemarch's tweet image. e. Copying an array.

➡️We can also copy the instance of an array by using the spread operator.

f. Spread operator and Strings

codemarch's tweet image. f. Spread operator and Strings

g. Spread Operator with Object

codemarch's tweet image. g. Spread Operator with Object

3. Difference between spread and rest operator ? ➡️Rest Parameter is collecting all remaining elements into an array . ➡️Spread Operator is unpacking collected elements such as arrays into single elements .

codemarch's tweet image. 3. Difference between spread and rest operator ?

➡️Rest Parameter is collecting all remaining elements into an array .
➡️Spread Operator is unpacking collected elements such as arrays into single elements .

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Awesome explanation🙌


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