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Python.Engineering Wiki Длина массива JavaScript: полное руководство

Длина массива JavaScript: полное руководство

array Python module | ast Python module | code Python module | COM PHP module | Ev PHP module | exp | imp Python module | io Python module | JavaScript | math Python module | os Python module | Python functions | Rar PHP module | re Python module | resource Python module | StackOverflow | time Python module | UI PHP module
Michael Zippo Michael Zippo 27.11.2021

–°–≤–æ–π—Å—Ç–≤–æ –¥–ª–∏–Ω—ã –º–∞—Å—Å–∏–≤–∞ JavaScript —É–∫–∞–∑—ã–≤–∞–µ—Ç –∫–æ–ª–∏—á–µ—Å—Ç–≤–æ —ç–ª–µ–º–µ–Ω—Ç–æ–≤ –≤ –º–∞—Å—Å–∏–≤–µ. –ß—Ç–æ–±—ã —É–∑–Ω–∞—Ç—å –¥–ª–∏–Ω—É –º–∞—Å—Å–∏–≤–∞, –æ–±—Ä–∞—Ç–∏—Ç–µ—Å—å –∫ –æ–±—ä–µ–∫—Ç—É –∏–º—è_–º–∞—Å—Å–∏–≤–∞.length. –°–≤–æ–π—Å—Ç–≤–æ length –≤–æ–∑–≤—Ä–∞—â–∞–µ—Ç —Ü–µ–ª–æ–µ —á–∏—Å–ª–æ.

–í—ã —á–∞—Å—Ç–æ —Ö–æ—Ç–∏—Ç–µ –∑–Ω–∞—Ç—å, —Å–∫–æ–ª—å–∫–æ –∑–Ω–∞—á–µ–Ω–∏–π –Ω–∞—Ö–æ–¥–∏—Ç—Å—è –≤ –º–∞—Å—Å–∏–≤–µ & mdash; –¥—Ä—É–≥–∏–º–∏ —Å–ª–æ–≤–∞–º–∏, –¥–ª–∏–Ω—É –º–∞—Å—Å–∏–≤–∞. –ó–¥–µ—Å—å –∏ –ø–æ—è–≤–ª—è–µ—Ç—Å—è —Å–≤–æ–π—Å—Ç–≤–æ –º–∞—Å—Å–∏–≤–∞ JavaScript length. –°–≤–æ–π—Å—Ç–≤–æ length –∏—Å–ø–æ–ª—å–∑—É–µ—Ç—Å—è –¥–ª—è –ø–æ–ª—É—á–µ–Ω–∏—è –∫–æ–ª–∏—á–µ—Å—Ç–≤–∞ —ç–ª–µ–º–µ–Ω—Ç–æ–≤, —Å–æ–¥–µ—Ä–∂–∞—â–∏—Ö—Å—è –≤ –∫–æ–Ω–∫—Ä–µ—Ç–Ω–æ–º –º–∞—Å—Å–∏–≤–µ. & Nbsp;

–ù–∞–ø—Ä–∏–º–µ—Ä, —Å–∫–∞–∂–µ–º, –≤—ã –≤—ã –ø—Ä–æ–¥–∞–≤–µ—Ü –∫–Ω–∏–≥ –∏ —Ö–æ—Ç–∏—Ç–µ –∑–Ω–∞—Ç—å, —Å–∫–æ–ª—å–∫–æ –∫–Ω–∏–≥ —É –≤–∞—Å –Ω–∞ —Å–∫–ª–∞–¥–µ. –í—ã –º–æ–∂–µ—Ç–µ –ø–æ–ª—É—á–∏—Ç—å –¥–ª–∏–Ω—É –≤–∞—à–µ–≥–æ —Å–ø–∏—Å–∫–∞ –∫–Ω–∏–≥, –∏—Å–ø–æ–ª—å–∑—É—è —Å–≤–æ–π—Å—Ç–≤–æ –¥–ª–∏–Ω—ã –º–∞—Å—Å–∏–≤–∞ JavaScript.

–í —ç—Ç–æ–º —Ä—É–∫–æ–≤–æ–¥—Å—Ç–≤–µ –±—É–¥–µ—Ç –∏–∑—É—á–µ–Ω–æ, –∫–∞–∫ –∏—Å–ø–æ–ª—å–∑–æ–≤–∞—Ç—å –º–µ—Ç–æ–¥ –¥–ª–∏–Ω—ã –º–∞—Å—Å–∏–≤–∞ –≤ JavaScript. –ú—ã —Ä–∞—Å—Å–º–æ—Ç—Ä–∏–º –¥–≤–∞ –ø—Ä–∏–º–µ—Ä–∞, –∫–æ—Ç–æ—Ä—ã–µ –∏—Å–ø–æ–ª—å–∑—É—é—Ç —ç—Ç–æ—Ç –º–µ—Ç–æ–¥ –≤ –ø—Ä–æ–≥—Ä–∞–º–º–µ JavaScript.

–î–ª–∏–Ω–∞ –º–∞—Å—Å–∏–≤–∞ JavaScript

–°–≤–æ–π—Å—Ç–≤–æ –¥–ª–∏–Ω—ã –º–∞—Å—Å–∏–≤–∞ JavaScript - —ç—Ç–æ —Ü–µ–ª–æ—á–∏—Å–ª–µ–Ω–Ω–æ–µ –∑–Ω–∞—á–µ–Ω–∏–µ, –∫–æ—Ç–æ—Ä–æ–µ –ø—Ä–µ–¥—Å—Ç–∞–≤–ª—è–µ—Ç –∫–æ–ª–∏—á–µ—Å—Ç–≤–æ —ç–ª–µ–º–µ–Ω—Ç–æ–≤ –≤ –º–∞—Å—Å–∏–≤–µ . –°–≤–æ–π—Å—Ç–≤–æ length –≤—Å–µ–≥–¥–∞ –Ω–∞ –µ–¥–∏–Ω–∏—Ü—É –±–æ–ª—å—à–µ, —á–µ–º –º–∞–∫—Å–∏–º–∞–ª—å–Ω–æ–µ –∑–Ω–∞—á–µ–Ω–∏–µ –∏–Ω–¥–µ–∫—Å–∞ –≤ –º–∞—Å—Å–∏–≤–µ, –ø–æ—Ç–æ–º—É —á—Ç–æ –∑–Ω–∞—á–µ–Ω–∏—è –∏–Ω–¥–µ–∫—Å–∞ –≤ JavaScript –Ω–∞—á–∏–Ω–∞—é—Ç—Å—è —Å 0. & Nbsp;

–ü–æ—Å–∫–æ–ª—å–∫—É length —è–≤–ª—è–µ—Ç—Å—è —Å–≤–æ–π—Å—Ç–≤–æ–º –≤ JavaScript, –æ–Ω–æ –Ω–µ –ø—Ä–∏–Ω–∏–º–∞–µ—Ç –Ω–∏–∫–∞–∫–∏—Ö –ø–∞—Ä–∞–º–µ—Ç—Ä–æ–≤. –û–Ω –ø—Ä–æ—Å—Ç–æ –¥–æ–±–∞–≤–ª—è–µ—Ç—Å—è –≤ –∫–æ–Ω–µ—Ü –º–∞—Å—Å–∏–≤–∞. & Nbsp;

–í–æ—Ç —Å–∏–Ω—Ç–∞–∫—Å–∏—Å —Å–≤–æ–π—Å—Ç–≤–∞ –¥–ª–∏–Ω—ã –º–∞—Å—Å–∏–≤–∞ JavaScript:

–ú—ã –¥–æ–±–∞–≤–ª—è–µ–º —Å–∏–Ω—Ç–∞–∫—Å–∏—Å .length –≤ –∫–æ–Ω–µ—Ü –∏–º–µ–Ω–∏ –º–∞—Å—Å–∏–≤–∞, —á—Ç–æ–±—ã –ø–æ–ª—É—á–∏—Ç—å –¥–æ—Å—Ç—É–ø –∫ –∑–Ω–∞—á–µ–Ω–∏—é —Å–≤–æ–π—Å—Ç–≤–∞ length.

81% —É—á–∞—Å—Ç–Ω–∏–∫–æ–≤ –∑–∞—è–≤–∏–ª–∏, —á—Ç–æ –ø–æ—Å–ª–µ —É—á–µ–±–Ω–æ–≥–æ –∫—É—Ä—Å–∞ –æ–Ω–∏ –ø–æ—á—É–≤—Å—Ç–≤–æ–≤–∞–ª–∏ —Å–µ–±—è –±–æ–ª–µ–µ —É–≤–µ—Ä–µ–Ω–Ω—ã–º–∏ –≤ —Å–≤–æ–∏—Ö –ø–µ—Ä—Å–ø–µ–∫—Ç–∏–≤–∞—Ö —Ç—Ä—É–¥–æ—É—Å—Ç—Ä–æ–π—Å—Ç–≤–∞ –≤ —Å—Ñ–µ—Ä–µ –≤—ã—Å–æ–∫–∏—Ö —Ç–µ—Ö–Ω–æ–ª–æ–≥–∏–π. –ü–æ–ª—É—á–∏—Ç–µ –ø—Ä–∏–≥–ª–∞—à–µ–Ω–∏–µ –Ω–∞ —É—á–µ–±–Ω—ã–π –∫—É—Ä—Å —Å–µ–≥–æ–¥–Ω—è.

–°—Ä–µ–¥–Ω–∏–π –≤—ã–ø—É—Å–∫–Ω–∏–∫ —É—á–µ–±–Ω–æ–≥–æ –ª–∞–≥–µ—Ä—è –ø–æ—Ç—Ä–∞—Ç–∏–ª –º–µ–Ω–µ–µ —à–µ—Å—Ç–∏ –º–µ—Å—è—Ü–µ–≤ –Ω–∞ –ø–µ—Ä–µ—Ö–æ–¥–Ω—É—é –∫–∞—Ä—å–µ—Ä—É, –æ—Ç –Ω–∞—á–∞–ª–∞ —É—á–µ–±–Ω–æ–≥–æ –ª–∞–≥–µ—Ä—è –¥–æ –ø–æ–∏—Å–∫–∞ —Å–≤–æ–µ–π –ø–µ—Ä–≤–æ–π —Ä–∞–±–æ—Ç—ã.

–î–∞–≤–∞–π—Ç–µ –ø—Ä–æ–π–¥–µ–º—Å—è —á–µ—Ä–µ–∑ –ø—Ä–∏–º–µ—Ä, —á—Ç–æ–±—ã –ø—Ä–æ–∏–ª–ª—é—Å—Ç—Ä–∏—Ä–æ–≤–∞—Ç—å —ç—Ç–æ—Ç –º–µ—Ç–æ–¥ –≤ –ø—Ä–æ–≥—Ä–∞–º–º–µ JavaScript. –ü—Ä–µ–¥–ø–æ–ª–æ–∂–∏–º, —É –Ω–∞—Å –µ—Å—Ç—å –∫–Ω–∏–∂–Ω—ã–π –º–∞–≥–∞–∑–∏–Ω. –ú—ã —Ö–æ—Ç–∏–º —É–∑–Ω–∞—Ç—å, —Å–∫–æ–ª—å–∫–æ –∫–Ω–∏–≥ –∏–∑ —Å–ø–∏—Å–∫–∞ –±–µ—Å—Ç—Å–µ–ª–ª–µ—Ä–æ–≤ —Ö—É–¥–æ–∂–µ—Å—Ç–≤–µ–Ω–Ω–æ–π –ª–∏—Ç–µ—Ä–∞—Ç—É—Ä—ã New York Times –∑–∞ 2019 –≥–æ–¥ –º—ã –ø—Ä–æ–¥–∞–µ–º. –û–¥–∏–Ω –∫–ª–∏–µ–Ω—Ç —Å–ø—Ä–æ—Å–∏–ª –æ –Ω–∞–ª–∏—á–∏–∏ —ç—Ç–∏—Ö –∫–Ω–∏–≥, –ø–æ—ç—Ç–æ–º—É –º—ã —Ä–µ—à–∏–ª–∏ –ø—Ä–æ–≤–µ—Ä–∏—Ç—å, —Å–∫–æ–ª—å–∫–æ –∫–Ω–∏–≥, –∫–æ—Ç–æ—Ä—ã–µ –º—ã –ø—Ä–æ–¥–∞–µ–º, –ø–æ—è–≤–∏–ª–æ—Å—å –≤ —Å–ø–∏—Å–∫–µ.

–í–æ—Ç –≥–¥–µ —Å–≤–æ–π—Å—Ç–≤–æ length –º–æ–∂–µ—Ç –±—ã—Ç—å –ø–æ–ª–µ–∑–Ω–æ. –î–æ–ø—É—Å—Ç–∏–º, —É –Ω–∞—Å –µ—Å—Ç—å —Å–ø–∏—Å–æ–∫ –∫–Ω–∏–≥, –∫–æ—Ç–æ—Ä—ã–µ –º—ã –ø—Ä–æ–¥–∞–µ–º, –∫–æ—Ç–æ—Ä—ã–µ –≤–æ—à–ª–∏ –≤ –±–µ—Å—Ç—Å–µ–ª–ª–µ—Ä—ã —Ö—É–¥–æ–∂–µ—Å—Ç–≤–µ–Ω–Ω–æ–π –ª–∏—Ç–µ—Ä–∞—Ç—É—Ä—ã New York Times 2019 –≥–æ–¥–∞ list. –ú—ã –º–æ–≥–ª–∏ —É–∑–Ω–∞—Ç—å, —Å–∫–æ–ª—å–∫–æ –∫–Ω–∏–≥, –∫–æ—Ç–æ—Ä—ã–µ –º—ã –ø—Ä–æ–¥–∞–µ–º, –µ—Å—Ç—å –≤ —ç—Ç–æ–º —Å–ø–∏—Å–∫–µ, –∏—Å–ø–æ–ª—å–∑—É—è —Å–≤–æ–π—Å—Ç–≤–æ length:

–ö–æ–≥–¥–∞ –º—ã –≤—ã–ø–æ–ª–Ω—è–µ–º –Ω–∞—à –∫–æ–¥, –ø—Ä–æ–≥—Ä–∞–º–º–∞ –≤–æ–∑–≤—Ä–∞—â–∞–µ—Ç: 6.

–°–Ω–∞—á–∞–ª–∞ –º—ã –æ–±—ä—è–≤–ª—è–µ–º –∫–æ–Ω—Å—Ç–∞–Ω—Ç—É —Å –∏–º–µ–Ω–µ–º nyt_fiction_best_sellers_2019. –≠—Ç–∞ –∫–æ–Ω—Å—Ç–∞–Ω—Ç–∞ —Ö—Ä–∞–Ω–∏—Ç —Å–ø–∏—Å–æ–∫ –∫–Ω–∏–≥ –≤ –Ω–∞—à–µ–º –∏–Ω–≤–µ–Ω—Ç–∞—Ä–µ, –∫–æ—Ç–æ—Ä—ã–π –ø–æ—è–≤–∏–ª—Å—è –≤ —Å–ø–∏—Å–∫–µ –ë–µ—Å—Ç—Å–µ–ª–ª–µ—Ä—ã —Ö—É–¥–æ–∂–µ—Å—Ç–≤–µ–Ω–Ω–æ–π –ª–∏—Ç–µ—Ä–∞—Ç—É—Ä—ã New York Times 2019. –ó–∞—Ç–µ–º –º—ã –∏—Å–ø–æ–ª—å–∑—É–µ–º —Å–≤–æ–π—Å—Ç–≤–æ –¥–ª–∏–Ω—ã —ç—Ä—Ç–∏, —á—Ç–æ–±—ã —É–∑–Ω–∞—Ç—å –¥–ª–∏–Ω—É —ç—Ç–æ–≥–æ —Å–ø–∏—Å–∫–∞. –í –¥–∞–Ω–Ω–æ–º —Å–ª—É—á–∞–µ –≤ –Ω–∞—à–µ–º —Å–ø–∏—Å–∫–µ —à–µ—Å—Ç—å –∑–Ω–∞—á–µ–Ω–∏–π, –ø–æ—ç—Ç–æ–º—É —Å–≤–æ–π—Å—Ç–≤–æ length –≤–æ–∑–≤—Ä–∞—â–∞–µ—Ç: 6.

–í—ã—á–∏—Å–ª–µ–Ω–∏–µ —Å—Ä–µ–¥–Ω–∏—Ö –∑–Ω–∞—á–µ–Ω–∏–π —Å –¥–ª–∏–Ω–æ–π –º–∞—Å—Å–∏–≤–∞ JavaScript

–°–≤–æ–π—Å—Ç–≤–æ length –∏–º–µ–µ—Ç –Ω–µ—Å–∫–æ–ª—å–∫–æ –≤–∞—Ä–∏–∞–Ω—Ç–æ–≤ –∏—Å–ø–æ–ª—å–∑–æ–≤–∞–Ω–∏—è –≤ JavaScript, –∏ –æ–¥–Ω–∏–º –∏–∑ –Ω–∞–∏–±–æ–ª–µ–µ —Ä–∞—Å–ø—Ä–æ—Å—Ç—Ä–∞–Ω–µ–Ω–Ω—ã—Ö –∏–∑ –Ω–∏—Ö —è–≤–ª—è–µ—Ç—Å—è –≤—ã—á–∏—Å–ª–µ–Ω–∏–µ —Å—Ä–µ–¥–Ω–∏—Ö –∑–Ω–∞—á–µ–Ω–∏–π.

–ü—Ä–µ–¥–ø–æ–ª–æ–∂–∏–º, –º—ã —Ö–æ—Ç–∏–º –Ω–∞–π—Ç–∏ —Å—Ä–µ–¥–Ω–∏–π –≤–æ–∑—Ä–∞—Å—Ç —É—á–∞—Å—Ç–Ω–∏–∫–æ–≤ —Ç–∞–Ω—Ü–µ–≤–∞–ª—å–Ω–æ–≥–æ –∫–ª–∞—Å—Å–∞. –£ –Ω–∞—Å –µ—Å—Ç—å —Å–ø–∏—Å–æ–∫, –≤ –∫–æ—Ç–æ—Ä–æ–º —Ö—Ä–∞–Ω—è—Ç—Å—è —Ç–∞–Ω—Ü–æ—Ä—ã " –≤–æ–∑—Ä–∞—Å—Ç–æ–≤. –ü–æ–∑–∂–µ –º—ã —Ä–µ—à–∞–µ–º, —á—Ç–æ —Ö–æ—Ç–∏–º –æ–∫—Ä—É–≥–ª–∏—Ç—å —Å—Ä–µ–¥–Ω–µ–µ –∑–Ω–∞—á–µ–Ω–∏–µ –¥–æ –±–ª–∏–∂–∞–π—à–µ–≥–æ —Ü–µ–ª–æ–≥–æ —á–∏—Å–ª–∞. –ù–∞–º –Ω—É–∂–Ω–æ –±—É–¥–µ—Ç –∏—Å–ø–æ–ª—å–∑–æ–≤–∞—Ç—å —Å–≤–æ–π—Å—Ç–≤–æ length –¥–ª—è –ø–æ–ª—É—á–µ–Ω–∏—è –∫–æ–ª–∏—á–µ—Å—Ç–≤–∞ —ç–ª–µ–º–µ–Ω—Ç–æ–≤ –≤ —Å–ø–∏—Å–∫–µ. –≠—Ç–æ –∑–Ω–∞—á–µ–Ω–∏–µ –ø–æ–º–æ–∂–µ—Ç –Ω–∞–º –≤—ã—á–∏—Å–ª–∏—Ç—å —Å—Ä–µ–¥–Ω–µ–µ –∑–Ω–∞—á–µ–Ω–∏–µ.

–ü—Ä–∏–º–µ—Ä –ø—Ä–æ–≥—Ä–∞–º–º—ã

–í–æ—Ç –ø—Ä–∏–º–µ—Ä –ø—Ä–æ–≥—Ä–∞–º–º—ã, –∫–æ—Ç–æ—Ä–∞—è –ø–æ–∑–≤–æ–ª–∏—Ç –Ω–∞–º —Ä–∞—Å—Å—á–∏—Ç–∞—Ç—å —Å—Ä–µ–¥–Ω–∏–π –≤–æ–∑—Ä–∞—Å—Ç —É—á–∞—Å—Ç–Ω–∏–∫–æ–≤ —Ç–∞–Ω—Ü–µ–≤–∞–ª—å–Ω–æ–≥–æ –∫–ª–∞—Å—Å–∞: < / p>

–ù–∞—à –∫–æ–¥ –≤–æ–∑–≤—Ä–∞—â–∞–µ—Ç:

–í –ø–µ—Ä–≤–æ–π —Å—Ç—Ä–æ–∫–µ –∫–æ–¥–∞ –º—ã –æ–±—ä—è–≤–ª—è–µ–º —Å–ø–∏—Å–æ–∫ JavaScript –ø–æ–¥ –Ω–∞–∑–≤–∞–Ω–∏–µ–º dancer_ages, –∫–æ—Ç–æ—Ä—ã–π —Ö—Ä–∞–Ω–∏—Ç –≤–æ–∑—Ä–∞—Å—Ç –∫–∞–∂–¥–æ–≥–æ —É—á–∞—Å—Ç–Ω–∏–∫–∞ —Ç–∞–Ω—Ü–µ–≤–∞–ª—å–Ω–æ–≥–æ –∫–ª–∞—Å—Å–∞. –ó–∞—Ç–µ–º –º—ã –æ–±—ä—è–≤–ª—è–µ–º –ø–µ—Ä–µ–º–µ–Ω–Ω—É—é —Å –∏–º–µ–Ω–µ–º sum, –≤ –∫–æ—Ç–æ—Ä–æ–π —Ö—Ä–∞–Ω–∏—Ç—Å—è –æ–±—â–∏–π –≤–æ–∑—Ä–∞—Å—Ç —á–ª–µ–Ω–æ–≤ –∫–ª–∞—Å—Å–∞. –≠—Ç–æ –∑–Ω–∞—á–µ–Ω–∏–µ –ø–æ–Ω–∞–¥–æ–±–∏—Ç—Å—è –Ω–∞–º –¥–ª—è —Ä–∞—Å—á–µ—Ç–∞ —Å—Ä–µ–¥–Ω–µ–≥–æ –ø–æ–∑–∂–µ.

–ü–µ—Ä–≤–æ–Ω–∞—á–∞–ª—å–Ω–æ –º—ã —É—Å—Ç–∞–Ω–∞–≤–ª–∏–≤–∞–µ–º –∑–Ω–∞—á–µ–Ω–∏–µ sum —Ä–∞–≤–Ω—ã–º 0, –ø–æ—Ç–æ–º—É —á—Ç–æ –Ω–∞–º –Ω—É–∂–Ω–æ –æ–±—ä—è–≤–∏—Ç—å –ø–µ—Ä–µ–º–µ–Ω–Ω—É—é, –ø—Ä–µ–∂–¥–µ —á–µ–º –µ–µ –º–æ–∂–Ω–æ –±—É–¥–µ—Ç –∏—Å–ø–æ–ª—å–∑–æ–≤–∞—Ç—å. –ó–∞—Ç–µ–º –º—ã –¥–æ–±–∞–≤–ª—è–µ–º –≤–æ–∑—Ä–∞—Å—Ç –∫–∞–∂–¥–æ–≥–æ —Ç–∞–Ω—Ü–æ—Ä–∞ –∫ sum –≤ –Ω–∞—à–µ–º —Ü–∏–∫–ª–µ for.

–ó–∞—Ç–µ–º –º—ã —Å–æ–∑–¥–∞–µ–º JavaScript –¥–ª—è —Ü–∏–∫–ª–∞ , –∫–æ—Ç–æ—Ä—ã–π –ø–µ—Ä–µ–±–∏—Ä–∞–µ—Ç –∫–∞–∂–¥—ã–π —ç–ª–µ–º–µ–Ω—Ç –≤ —Å–ø–∏—Å–∫–µ dancer_ages –∏ –¥–æ–±–∞–≤–ª—è–µ—Ç –µ–≥–æ –≤ –ø–µ—Ä–µ–º–µ–Ω–Ω—É—é sum. –û–±—Ä–∞—Ç–∏—Ç–µ –≤–Ω–∏–º–∞–Ω–∏–µ, —á—Ç–æ –º—ã –∏—Å–ø–æ–ª—å–∑—É–µ–º —Å–≤–æ–π—Å—Ç–≤–æ dancer_ages.length, —á—Ç–æ–±—ã —Å–æ–æ–±—â–∏—Ç—å –Ω–∞—à–µ–π –ø—Ä–æ–≥—Ä–∞–º–º–µ, —Å–∫–æ–ª—å–∫–æ —Ä–∞–∑ –æ–Ω –¥–æ–ª–∂–µ–Ω –≤—ã–ø–æ–ª–Ω—è—Ç—å—Å—è.

–ü–æ—Å–ª–µ –≤—ã–ø–æ–ª–Ω–µ–Ω–∏—è —Ü–∏–∫–ª–∞ for –Ω–∞—à–∞ –ø—Ä–æ–≥—Ä–∞–º–º–∞ –≤—ã—á–∏—Å–ª—è–µ—Ç —Å—Ä–µ–¥–Ω–∏–π –≤–æ–∑—Ä–∞—Å—Ç —á–ª–µ–Ω–æ–≤ –≤ –∫–ª–∞—Å—Å–µ. –ù–∞—à–∞ –ø—Ä–æ–≥—Ä–∞–º–º–∞ –¥–µ–ª–∞–µ—Ç —ç—Ç–æ –ø—É—Ç–µ–º –¥–µ–ª–µ–Ω–∏—è —Å—É–º–º—ã (—Å—É–º–º–∞ –≤—Å–µ—Ö –≤–æ–∑—Ä–∞—Å—Ç–æ–≤ —Ç–∞–Ω—Ü–æ—Ä–æ–≤) –Ω–∞ dancer_ages.length (–∫–æ–ª–∏—á–µ—Å—Ç–≤–æ —á–µ–ª–æ–≤–µ–∫ –≤ —Ç–∞–Ω—Ü–µ–≤–∞–ª—å–Ω–æ–º –∫–ª–∞—Å—Å–µ). –ó–∞—Ç–µ–º –º—ã –∏—Å–ø–æ–ª—å–∑—É–µ–º –º–µ—Ç–æ–¥ Math.round () —á—Ç–æ–±—ã –æ–∫—Ä—É–≥–ª–∏—Ç—å –Ω–∞—à–µ –∑–Ω–∞—á–µ–Ω–∏–µ –¥–æ –±–ª–∏–∂–∞–π—à–µ–≥–æ —Ü–µ–ª–æ–≥–æ.

Fina –í –∫–æ–Ω—Ü–µ –∫–æ–Ω—Ü–æ–≤, –º—ã –≤—ã–≤–æ–¥–∏–º –Ω–∞ –∫–æ–Ω—Å–æ–ª—å —Å–æ–æ–±—â–µ–Ω–∏–µ, –≤ –∫–æ—Ç–æ—Ä–æ–º –≥–æ–≤–æ—Ä–∏—Ç—Å—è: " –°—Ä–µ–¥–Ω–∏–π –≤–æ–∑—Ä–∞—Å—Ç —É—á–∞—Å—Ç–Ω–∏–∫–∞ —Ç–∞–Ω—Ü–µ–≤–∞–ª—å–Ω–æ–≥–æ –∫–ª–∞—Å—Å–∞: & rdquo ;. –ó–∞ —ç—Ç–∏–º –≤—ã—Ä–∞–∂–µ–Ω–∏–µ–º —Å–ª–µ–¥—É–µ—Ç –∑–Ω–∞—á–µ–Ω–∏–µ, —Ö—Ä–∞–Ω—è—â–µ–µ—Å—è –≤ —Å—Ä–µ–¥–Ω–µ–º –ø–µ—Ä–µ–º–µ–Ω–Ω–æ–π JavaScript , –∏ —Ç–æ—á–∫–∞ (. < / em>).

–ó–∞–∫–ª—é—á–µ–Ω–∏–µ

–°–≤–æ–π—Å—Ç–≤–æ –¥–ª–∏–Ω—ã –º–∞—Å—Å–∏–≤–∞ JavaScript –∏—Å–ø–æ–ª—å–∑—É–µ—Ç—Å—è –¥–ª—è –ø–æ–ª—É—á–µ–Ω–∏—è –∫–æ–ª–∏—á–µ—Å—Ç–≤–∞ —ç–ª–µ–º–µ–Ω—Ç–æ–≤, —Ö—Ä–∞–Ω—è—â–∏—Ö—Å—è –≤ —Å–ø–∏—Å–∫–µ. –≠—Ç–æ—Ç –º–µ—Ç–æ–¥ –æ—Å–æ–±–µ–Ω–Ω–æ –ø–æ–¥—Ö–æ–¥–∏—Ç –¥–ª—è –≤—ã—á–∏—Å–ª–µ–Ω–∏—è —Å—Ä–µ–¥–Ω–∏—Ö –∏ –¥—Ä—É–≥–∏—Ö —Å—É–º–º, —Ç—Ä–µ–±—É—é—â–∏—Ö –∑–Ω–∞–Ω–∏—è –¥–ª–∏–Ω—ã —Å–ø–∏—Å–∫–∞.

–í —ç—Ç–æ–º —Ä—É–∫–æ–≤–æ–¥—Å—Ç–≤–µ –æ–±—Å—É–∂–¥–∞–ª–æ—Å—å, –∫–∞–∫ –∏—Å–ø–æ–ª—å–∑–æ–≤–∞—Ç—å —Å–≤–æ–π—Å—Ç–≤–æ length –¥–ª—è –ø–æ–ª—É—á–µ–Ω–∏—è –∫–æ–ª–∏—á–µ—Å—Ç–≤–∞ —ç–ª–µ–º–µ–Ω—Ç–æ–≤ –≤ –º–∞—Å—Å–∏–≤–µ JavaScript. –ú—ã —Ç–∞–∫–∂–µ —Ä–∞—Å—Å–º–æ—Ç—Ä–µ–ª–∏ –¥–≤–∞ –ø—Ä–∏–º–µ—Ä–∞ —Å–≤–æ–π—Å—Ç–≤–∞ –¥–ª–∏–Ω—ã. –ü—Ä–æ—á–∏—Ç–∞–≤ —ç—Ç–æ —Ä—É–∫–æ–≤–æ–¥—Å—Ç–≤–æ, –≤—ã –≥–æ—Ç–æ–≤—ã –Ω–∞—á–∞—Ç—å –∏—Å–ø–æ–ª—å–∑–æ–≤–∞—Ç—å —Å–≤–æ–π—Å—Ç–≤–æ length –∫–∞–∫ —ç–∫—Å–ø–µ—Ä—Ç!

–•–æ—Ç–∏—Ç–µ —É–∑–Ω–∞—Ç—å –±–æ–ª—å—à–µ –æ –∫–æ–¥–∏—Ä–æ–≤–∞–Ω–∏–∏ –Ω–∞ JavaScript? –ü—Ä–æ—á—Ç–∏—Ç–µ –Ω–∞—à–µ —Ä—É–∫–æ–≤–æ–¥—Å—Ç–≤–æ "–ö–∞–∫ –∏–∑—É—á–∏—Ç—å JavaScript" . –í—ã –Ω–∞–π–¥–µ—Ç–µ —Å–æ–≤–µ—Ç—ã –æ —Ç–æ–º, –∫–∞–∫–∏–µ –∫—É—Ä—Å—ã –∏ —É—á–µ–±–Ω—ã–µ —Ä–µ—Å—É—Ä—Å—ã –º–æ–≥—É—Ç –ø–æ–º–æ—á—å –≤–∞–º —É–ª—É—á—à–∏—Ç—å —Å–≤–æ–∏ –∑–Ω–∞–Ω–∏—è JavaScript.