JavaScript Sprawdź, czy tablica jest pusta
if (typeof array !== 'undefined' && array.length === 0) {
// the array is defined and has no elements
}
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if (typeof array !== 'undefined' && array.length === 0) {
// the array is defined and has no elements
}
if (array && !array.length) {
// array is defined but has no element
}if (Array.isArray(array) && array.length) {
// array exists and is not empty
}if (!Array.isArray(array) || !array.length) {
// array does not exist, is not an array, or is empty
// ⇒ do not attempt to process array
}
if (typeof image_array !== 'undefined' && image_array.length > 0) {
// the array is defined and has at least one element
}function checkEmptyString(item){
if (item.trim().length > 0) return false;
else return true;
};
function checkIfArrayContainsEmptyString(array) {
const containsEmptyString = array.some(checkEmptyString);
return containsEmptyString;
};
console.log(checkIfArrayContainsEmptyString(["","hey","","this","is","my","solution"]))
// *returns true*
console.log(checkIfArrayContainsEmptyString(["yay","it","works"]))
// *returns false*
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