how to check in array value is it string javascript code example
Example 1: Checking whether a value exists in an array javascript
const fruits = ['apple', 'banana', 'mango', 'guava'];
function checkAvailability(arr, val) {
return arr.some(arrVal => val === arrVal);
}
checkAvailability(fruits, 'kela');
checkAvailability(fruits, 'banana');
Example 2: check if array does not contain string js
function checkInput(input, words) {
return words.some(word => input.toLowerCase().includes(word.toLowerCase()));
}
console.log(checkInput('"Definitely," he said in a matter-of-fact tone.',
["matter", "definitely"]));
Example 3: check if array does not contain string js
function checkInput(input, words) {
return words.some(word => new RegExp(word, "i").test(input));
}
console.log(checkInput('"Definitely," he said in a matter-of-fact tone.',
["matter", "definitely"]));
Example 4: check if an element is already in an array
private boolean ZitAlInArray(int value, List<Integer> list) {
return array.indexOf(value) > -1;
}
private boolean zitAlInArray(int[] array, int index) {
for (int i = 0; i < index; i++) {
if (array[i] == array[index]) {
return true;
}
}
return false;
}