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Vigezo bya msingi katika kutenganua safu ndani ya JavaScript

Kwa vigezu inawezekana kubainisha vigezo bya msingi. Katika hali hii, ikiwa kigezo hakitoshelewi na kipengele cha safu - thamani ya msingi itachukuliwa. Katika mfano ufuatao kigezo day kwa msingi kimebainishwa thamani 1:

let arr = [2025, 12]; let [year, month, day = 1] = arr; console.log(year); // inatoa 2025 console.log(month); // inatoa 12 console.log(day); // inatoa 1

Lakini ikiwa kwa kigezo day kutakuwa na thamani ndani ya safu - thamani ya msingi itaachwa:

let arr = [2025, 12, 31]; let [year, month, day = 1] = arr; console.log(year); // inatoa 2025 console.log(month); // inatoa 12 console.log(day); // inatoa 31

Katika msimbo ufuatao sehemu za safu zinaandikwa katika vigezu vinavyofanana:

let arr = ['John', 'Smit', 'development', 'programmer']; let name = arr[0]; let surname = arr[1]; let department = arr[2]; let position; if (arr[3] !== undefined) { position = arr[3]; } else { position = 'trainee'; }

Badilisha msimbo huu kupitia kutenganua kulingana na nadharia iliyojifunzwa.

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