js test if array
if(Array.isArray(myVarToTest)) {
// myVatToTest is an array
} else {
// myVarToTest is not an array
}js test if array
if(Array.isArray(myVarToTest)) {
// myVatToTest is an array
} else {
// myVarToTest is not an array
}check if array contain the all element javascript
const myArray: number[] = [2, 4, 6, 8, 10, 12, 14, 16];
const elements: number[] = [4, 8, 12, 16];
function containsAll(arr: number[]) {
return (
arr.includes(elements[0]) &&
arr.includes(elements[1]) &&
arr.includes(elements[2]) &&
arr.includes(elements[3])
);
}
console.log(containsAll(myArray));
or you could use the following line:
function c2(arr: number[]) {
return elements.every((val: number) => arr.includes(val));
}Copyright © 2021 Codeinu
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