Merge Array

How to combine two sorted arrays into one? We can do this easily with the spread operator.

a1 = [1, 2, 5, 6, 9];
a2 = [3, 4, 7, 8, 10];

res = [...a1, ...a2]; // [1, 2, 5, 6, 9, 3, 4, 7, 8, 10]

But if we want to combine and sort? Again, nothing complicated!

res = [...a1, ...a2].sort((a, b) => +a > +b); // [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

Có thể bạn đã miss một số snippets code

How to reverse an Array?

Reversing an array in JS is really simple with the standard array method. Like below

Use flatMap() creates a new array with sub-array elements flattened by specified depth.

lỗi access-control-allow-origin và cách khắc phục trong express, nodejs

Random String với độ dài tuỳ chọn