Array of different types javascript
Mar 3, 2022
[1, 2, 3).push(4) // [1,2,3,4]
[1, 2, 3].pop() // [1,2]
[1, 2, 3]. shift() // [2,3]
[1, 2, 3].unshift(0) // [0,1,2,3]
[‘a’, ‘b’].concat(c) // [‘a’, ‘b’, ‘c’]
[‘a’, ‘b’, ‘c’].join(‘-’) // a-b-c
[‘a’, ‘b’, ‘c’].slice(1) // [‘a’, ‘b]
[‘a’, ‘b’, ‘c’].indexOf(‘b’) // 1 ;
[‘a’, ‘b’, ‘c’].includes(‘c’) // true
[3, 5, 6, 8].find((n) => n % 2 === 0) // 6
[2, 4, 3, 5).findIndex((n) => n % 2 !== 0) 1/2,
[3, 4, 8, 6].map((n) => n * 2) // [6,8,16,12]
[1, 4, 7, 8].filter((n) => n % 2 === 0) // [4,8]
[2, 4, 3, 7).reduce((acc, cur) => acc + cur) // 16
[2, 3, 4, 5].every((x) => x < 6) // true
[3, 5, 6, 8]. some((n) => n > 6) // true
[1, 2, 3, 4).reverse() // [4,3,2,1)
[3, 5, 7, 8].at(-2) // 7
