Javascript: every() ve some() Fonksiyonlarının Kullanımı
Her iki fonksiyon dizide kullanılır.
every() fonksiyonu
Dizinin tüm öğelerinin verilen koşulu karşılayıp karşılamadığını belirlemek için kullanılır.
some() fonksiyonu
Dizinin en az bir öğesinin sağlanan ölçütü karşılayıp karşılamadığını belirlemek için kullanılır.
every() ve some() fonksiyonunun farkı
Herhangi bir koşul sağlanırsa some() fonksiyonu true değerini döndürmesi, ancak bunların tümü doğruysa every() fonksiyonunun true, döndürmesidir.
Bu örnekte some() fonksiyonu kullanılmıştır.
function isnumbereven(element) {
return (element % 2 == 0);
}
function print() {
var arr = [ 4, 3, 13, 43, 58 ];
// sadece bir eleman koşulu sağlıyorsa
var value = arr.some(isnumbereven);
console.log(value);
}
print(); // output true
Bu örnekte every() fonksiyonu kullanılmıştır.
function isnumbereven(element) {
return (element % 2 == 0);
}
function print() {
var arr = [ 4, 3, 13, 43, 58 ];
// bütün numaraları kontrol etme
var value = arr.every(isnumbereven);
console.log(value);
}
print(); // output false
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