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Qo'llanma
JavaScript dasturlash tili
Ma'lumot turlari
Massivlar

Massiv kontekstida chaqirish

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let arr = ["a", "b"];

arr.push(function () {
  alert(this);
});

arr[2](); // ?

arr[2]() chaqiruvi sintaktik ravishda eski obj[method](), bizda obj – arr rolida va 2– method rolida.

Shunday qilib, biz obyekt usuli sifatida arr[2] funktsiyasini chaqiramiz. Tabiiyki, u arr obyektiga murojaat qilib this ni oladi va massivni chiqaradi:

let arr = ["a", "b"];

arr.push(function () {
  alert(this);
});

arr[2](); // a,b,function(){...}

Massivda 3 ta qiymat mavjud: dastlab unda ikkita qiymat mavjud edi, funktsiya qiymati qo’shildi.

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