https://github.com/ahmadjajja/array_in_depth_lec_work.
https://github.com/ahmadjajja/array_in_depth_lec_work.
Last synced: about 2 months ago
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- Host: GitHub
- URL: https://github.com/ahmadjajja/array_in_depth_lec_work.
- Owner: Ahmadjajja
- Created: 2022-10-14T06:19:37.000Z (almost 3 years ago)
- Default Branch: main
- Last Pushed: 2023-03-26T09:51:02.000Z (over 2 years ago)
- Last Synced: 2025-03-15T06:30:57.076Z (7 months ago)
- Size: 2.93 KB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Array_in_depth_lec_work.
```javascript
var names=["ahmad","sultan","jajja","danish","jajja","hamid","jajja"];
console.log("array",names);
console.log("array-length=",names.length);
console.log("last-index=",names[names.length-1]);
// push operation
// push operation insert value at the last index
console.log("array before push operation=>",names);
names.push("hasnain jajja");
console.log("array after push operation=>",names);
// pop operation
// pop operation delete value at the last index
console.log("array before pop operation=>",names);
names.pop();
console.log("array after pop operation=>",names);
// unshift operation
// unshift function insert values at first index and value stored at index 1 shifted to next index
console.log("array before unshift operation=>",names);
names.unshift("ali jajja");
console.log("array after unshift operation=>",names);
// shift operation
// shift operation delete value at start index
console.log("array before shift operation=>",names);
names.shift();
console.log("array after shift operation=>",names);
// splice operation
// ist value(2) means start from 2 index
// 2nd value(2) means(two deleting index) delete values at index 2 and 3
// 3rd value(cs-student,chemistry student,2) means insert values at index 2,3,4 and remaining value will start from upcoming index
console.log("array before splice operation=>",names);
names.splice(2,2,"cs_student","chemistry student",2);
console.log("array after splice operation=>",names);
// slice operation
// slice operation uses for making another array from the values of first array but the values in first array remains same.
// first value(0) means value stored at index 0 of array will be included.
// 2nd value(7) means values stored before index 7 will be included and value stored at index 7 will not be included.
console.log("array before slice operation=>",names);
var newNames=names.slice(0,7);
console.log("array after slice operation=>",names);
console.log("new array=>",newNames);
// first lecture of array is over
```