This post was most recently updated on August 2nd, 2024
Javascript array functions
1. toString() – convert array to string
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var color = ['red', 'green', 'orange', 'blue'] color.toString(); Output:red, green, orange, blue |
2. pop() – remove/delete last element from an array
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var color = ['red', 'green', 'orange', 'blue']; color.pop();Output:red, green, orange |
3. push() – add/insert element at the top
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var color = ['red', 'green', 'orange', 'blue']; color.push('yellow'); Output:red, green, orange, blue, yellow |
4. shift() – remove/delete first element from an array
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var color = ['red', 'green', 'orange', 'blue'] color.shift(); Output:green, orange, blue |
5. unshift() – add/insert element at first position
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var color = ['red', 'green', 'orange', 'blue']; color.unshift('yellow'); Output:yellow, red, green, orange, blue |
6. concat() – merged(concat) existing array and create new array
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var color1 = ['red', 'green']; var color2 = ['orange', 'blue']; var color = color1.concat(color2); Output:red, green, orange, blue |
7. slice() – slice out piece of array
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var color = ['red', 'green', 'orange', 'blue']; var color1 = color.slice(1); Output:green, orange, blue |
It slice out first element (red)
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var color = ['red', 'green', 'orange', 'blue']; var color1 = color.slice(1,3); Output:green, orange |
It slice out two element (green, orange)
