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","creator":{"public_name":"Сергей К.","id":5174,"is_tutor":false},"comments":[{"creator":{"public_name":"Nikolai Gagarinov","id":104929,"is_tutor":true},"id":172432,"body":"Добрый день.\n\nВ первом случае используется ренж, а во втором - два аргумента.\nСам метод (квадратные скобки это метод) может принимать даже другую строку или регулярку.\nПодробнее про метод - https://ruby-doc.org/3.2.1/String.html#method-i-5B-5D","topic_id":85492}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Строки","entity_url":null,"active":true}},{"id":77125,"title":"Привет! \nНе понятно, почему у меня в тесте этот ответ неправильный? Ведь ровно это он и печатает. \nВопрос: \nДопишите код так, чтобы он напечатал строку Hello, #{hexlet}:\nОтвет:\nputs 'Hello, #{hexlet}'\nПодскажите, почему так?","plain_title":"Привет! Не понятно, почему у меня в тесте этот ответ неправильный? Ведь ровно это он и печатает. Вопрос: Допишите код так, чтобы он напечатал строку Hello, #{hexlet}: Ответ: puts 'Hello, #{hexlet}' Подскажите, почему так? ","creator":{"public_name":"Julia Gulla","id":195863,"is_tutor":false},"comments":[{"creator":{"public_name":"Aleksandr Litvinov","id":117182,"is_tutor":true},"id":160303,"body":"Мы с вами общались в слаке, верно? Я всё поправил :)","topic_id":77125},{"creator":{"public_name":"Julia Gulla","id":195863,"is_tutor":false},"id":160559,"body":"Спасибо!","topic_id":77125},{"creator":{"public_name":"Julia Gulla","id":195863,"is_tutor":false},"id":160112,"body":"Проверила код в RubyMine. Всё выводится как надо. Но в тесте упорно висит \"Неправильный ответ\"","topic_id":77125}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Строки","entity_url":null,"active":true}},{"id":78090,"title":"Много вариантов подходит под это выражение 'hexlet'. ? 'ruby' => false.\nНапример hexlet'.eql? 'ruby\nТут нужно угадать ?","plain_title":"Много вариантов подходит под это выражение 'hexlet'. ? 'ruby' => false. Например hexlet'.eql? 'ruby Тут нужно угадать ? ","creator":{"public_name":"Денис Левченко","id":279045,"is_tutor":false},"comments":[{"creator":{"public_name":"Денис Левченко","id":279045,"is_tutor":false},"id":161876,"body":"Да было бы хорошо, что я далее двигаться не могу","topic_id":78090},{"creator":{"public_name":"Aleksandr Litvinov","id":117182,"is_tutor":true},"id":161875,"body":"Да, вы правы. Не очень удачный вопрос. Переделаю его.","topic_id":78090},{"creator":{"public_name":"Денис Левченко","id":279045,"is_tutor":false},"id":162054,"body":"Да стало понятнее, спасибо)","topic_id":78090},{"creator":{"public_name":"Aleksandr Litvinov","id":117182,"is_tutor":true},"id":161996,"body":"Обновил, посмотрите, стало ли понятнее?","topic_id":78090}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Строки","entity_url":null,"active":true}},{"id":93869,"title":"Добрый день. \n\nВ решении учителя дано следующее решение: \n```\ndef prepare_card_for_display(card_number)\n last_part = card_number[-4..]\n \"**#{last_part}\"\nend\n```\nЕсли я меняю последнюю строку на `puts **#{last_part}` то в результате, к примеру, номер карты 12349876534521349 выдает **197598024552341584 а не **1349. Что тут неправильно? Проверял через VSCode и встроенный в Хекслет тренажёр. ","plain_title":"Добрый день. В решении учителя дано следующее решение: def prepare_card_for_display(card_number) last_part = card_number[-4..] \"**#{last_part}\" end Если я меняю последнюю строку на puts **#{last_part} то в результате, к примеру, номер карты 12349876534521349 выдает *197598024552341584 а не *1349. Что тут неправильно? Проверял через VSCode и встроенный в Хекслет тренажёр. ","creator":{"public_name":"Егений Соколов","id":709019,"is_tutor":false},"comments":[{"creator":{"public_name":"Егений Соколов","id":709019,"is_tutor":false},"id":184029,"body":"Прошу прощения, ошибку свою понял. При передаче card_number я использовал INT вместо строки :) ","topic_id":93869}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Строки","entity_url":null,"active":true}}],"lesson":{"exercise":{"id":1964,"slug":"ruby_basics_strings","name":null,"state":"active","kind":"exercise","language":"ruby","locale":"ru","has_web_view":false,"has_test_view":false,"reviewable":true,"readme":"## solution.rb\n\nНомер банковской карточки является персональной и достаточно чувствительной информацией. Поэтому никакие системы не показывают его полностью даже владельцу карты (вдруг кто-то украл доступ в аккаунт). Вместо этого в интерфейсах часто показывают четыре последних символа, а остальное скрывают за зведочками.\n\nРеализуйте функцию `prepare_card_for_display()`, которая принимает на вход номер карты (в виде строки) и возвращает строку, в которой шесть символов. Первые два — звездочки, последние четыре соответствуют последним четырём цифрам в номере карты:\n\n```ruby\nprepare_card_for_display('1234789023457890') # '**7890'\nprepare_card_for_display('0192837409128735') # '**8735'\n```\n","prepared_readme":"## solution.rb\n\nНомер банковской карточки является персональной и достаточно чувствительной информацией. Поэтому никакие системы не показывают его полностью даже владельцу карты (вдруг кто-то украл доступ в аккаунт). Вместо этого в интерфейсах часто показывают четыре последних символа, а остальное скрывают за зведочками.\n\nРеализуйте функцию `prepare_card_for_display()`, которая принимает на вход номер карты (в виде строки) и возвращает строку, в которой шесть символов. Первые два — звездочки, последние четыре соответствуют последним четырём цифрам в номере карты:\n\n```ruby\nprepare_card_for_display('1234789023457890') # '**7890'\nprepare_card_for_display('0192837409128735') # '**8735'\n```\n","has_solution":true,"entity_name":"Строки"},"units":[{"id":6404,"name":"theory","url":"/courses/ruby-basics/lessons/strings/theory_unit"},{"id":7014,"name":"quiz","url":"/courses/ruby-basics/lessons/strings/quiz_unit"},{"id":6425,"name":"exercise","url":"/courses/ruby-basics/lessons/strings/exercise_unit"}],"links":[],"ordered_units":[{"id":6404,"name":"theory","url":"/courses/ruby-basics/lessons/strings/theory_unit"},{"id":7014,"name":"quiz","url":"/courses/ruby-basics/lessons/strings/quiz_unit"},{"id":6425,"name":"exercise","url":"/courses/ruby-basics/lessons/strings/exercise_unit"}],"id":2811,"slug":"strings","state":"approved","name":"Строки","course_order":350,"goal":"Изучаем различные способы работы со строками","self_study":null,"theory_video_provider":null,"theory_video_uid":null,"theory":"Базовые операции со строками в любом языке – это интерполяция и конкатенация. Как это делается на Ruby:\n\n```ruby\n# Конкатенация\nname = 'H' + 'e' + 'x' + 'l' + 'e' + 't' # Hexlet\n# Можно даже так\nname = 'H' 'e' 'x' 'l' 'e' 't' # Hexlet\n# Интерполяция\ngreeting = \"hello #{name}\" # hello Hexlet\n```\n\nИнтерполяция выполняется только в строках с двойными кавычками. Строки, состоящие из одиночных кавычек, воспринимаются «как есть» — по аналогии с PHP.\n\n```ruby\nline_feed = \"one line\\nanother one\"\n# one line\n# another one\n```\n\nКак и в большинстве других языков, интерполяция в Ruby предпочтительнее конкатенации.\n\nПомимо стандартных конкатенации и интерполяции, строки в Ruby усилены срезами и большим числом полезных методов. Вот лишь некоторые примеры:\n\n```ruby\nname = 'ruby'\nname.upcase # 'RUBY'\n''.empty? # true\nname.include? 'ru' # true\nname.capitalize # Ruby\nname.length # 4\n```\n\nОдна из самых классных возможностей у строк – слайсы. С их помощью можно находить любую подстроку в строке. Слайс — тоже метод, но с дополнительным синтаксисом из квадратных скобок:\n\n```ruby\nname = 'ruby'\n# второй символ (счёт идёт с нуля)\nname[1] # u\n# Последний символ\nname[-1] # y\n# два символа, начиная с нулевого индекса\nname[0, 2] # ru\n# от первого до второго с конца\nname[0..-2] # rub\n# от 4 с конца до последнего символа\nname[-4..] # ruby\n# и даже регулярные выражения!\nname[/ru/] # ru\n```\n"},"lessonMember":null,"courseMember":null,"course":{"start_lesson":{"exercise":null,"units":[{"id":7191,"name":"theory","url":"/courses/ruby-basics/lessons/intro/theory_unit"}],"links":[],"ordered_units":[{"id":7191,"name":"theory","url":"/courses/ruby-basics/lessons/intro/theory_unit"}],"id":3209,"slug":"intro","state":"approved","name":"Введение","course_order":50,"goal":"Знакомимся с курсом","self_study":null,"theory_video_provider":null,"theory_video_uid":null,"theory":"Ruby — язык, созданный для того, чтобы программисты были счастливы. Он взял в себя лучшее из Lisp, Smalltalk и Perl — он объектно-ориентирован, но в то же время его декларативность позволяет писать в процедурной и функциональной парадигме.\n\nЛаконичный код, отсутствие шума и богатые возможности делают Ruby одним из самых \"быстрых\" языков для написания кода.\n\nПрофессия разработчик на Ruby on Rails на Хекслете дает все необходимые знания и навыки для трудоустройства. С этого курса начинается погружение в сам язык.\n\nКурс включает в себя основы программирования на Ruby. Также в нем объясняются такие вещи, как особенности самого Ruby, его отличия от других языков, рассказывается о функциональном программировании, тестировании, метапрограммировании и многом другом.\n\nЦели данного курса:\n\n* Познакомиться с основными конструкциями языка\n* Научиться работать в среде Хекслета, разобраться со структурой практических заданий\n* Познакомиться с отладкой и научиться эффективно ее выполнять\n"},"id":232,"slug":"ruby-basics","challenges_count":10,"name":"Ruby","allow_indexing":true,"state":"approved","course_state":"finished","pricing_type":"paid","description":"На этом курсе вы изучите основы языка Ruby. Вы познакомитесь с экосистемой Ruby, ключевыми возможностями языка, а также узнаете о объектно-ориентированном программировании и метапрограммировании. В итоге научитесь использовать и определять функции, писать несложные программы, искать и анализировать ошибки в коде. Знания из этого курса помогут получить основное представление о языке Ruby, его принципах и особенностях.","kind":"basic","updated_at":"2026-01-20T11:54:35.251Z","language":"ruby","duration_cache":151680,"skills":["Синтаксису Ruby","Использовать коллекции","Писать в функциональном стиле","Тестировать свой код","Писать программы, которые могут менять свое поведение во время выполнения","Разбираться в богатой экосистеме Ruby-библиотек"],"keywords":["ruby","rubygems","testing","oop","metaprogramming"],"lessons_count":33,"cover":"https://hexlet.io/rails/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6OTExMSwicHVyIjoiYmxvYl9pZCJ9fQ==--096a7d4515011efc87371bcdd9152f2b583e3c78/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJwbmciLCJyZXNpemVfdG9fZmlsbCI6WzYwMCw0MDBdfSwicHVyIjoidmFyaWF0aW9uIn19--6067466c2912ca31a17eddee04b8cf2a38c6ad17/image.png"},"recommendedLandings":[{"stack":{"id":475,"slug":"rails","title":"Ruby on 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{.mantine-hidden-from-lg {display: none !important;}}@media (max-width: 87.99375em) {.mantine-visible-from-xl {display: none !important;}}@media (min-width: 88em) {.mantine-hidden-from-xl {display: none !important;}}</style><div style="position:absolute;top:0rem" class=""></div><div style="max-width:var(--container-size-xl);height:100%;min-height:0rem" class=""><style data-mantine-styles="inline">.__m__-_R_5ub_{--grid-gutter:0rem;}</style><div style="height:100%;min-height:0rem" class="m_410352e9 mantine-Grid-root __m__-_R_5ub_"><div class="m_dee7bd2f mantine-Grid-inner" style="height:100%"><style data-mantine-styles="inline">.__m__-_R_rdub_{--col-flex-grow:auto;--col-flex-basis:91.66666666666667%;--col-max-width:91.66666666666667%;}@media(min-width: 48em){.__m__-_R_rdub_{--col-flex-grow:auto;--col-flex-basis:83.33333333333334%;--col-max-width:83.33333333333334%;}}</style><div style="min-width:0rem;height:100%;min-height:0rem;display:flex" class="m_96bdd299 mantine-Grid-col __m__-_R_rdub_"><style data-mantine-styles="inline">.__m__-_R_6qrdub_{margin-top:0rem;padding-inline:var(--mantine-spacing-xs);width:100%;}@media(min-width: 48em){.__m__-_R_6qrdub_{margin-top:var(--mantine-spacing-xl);width:80%;}}@media(min-width: 62em){.__m__-_R_6qrdub_{padding-inline:var(--mantine-spacing-xl);}}</style><div style="margin-inline:auto;max-width:var(--mantine-breakpoint-xl)" class="__m__-_R_6qrdub_"><div style="color:var(--mantine-color-dimmed)" class="m_4451eb3a mantine-Center-root" data-inline="true"><div style="--ti-size:var(--ti-size-xs);--ti-bg:transparent;--ti-color:var(--mantine-color-indigo-light-color);--ti-bd:calc(0.0625rem * var(--mantine-scale)) solid transparent;margin-inline-end:calc(0.125rem * var(--mantine-scale));color:inherit" class="m_7341320d mantine-ThemeIcon-root" data-variant="transparent" data-size="xs"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-lock "><path d="M5 13a2 2 0 0 1 2 -2h10a2 2 0 0 1 2 2v6a2 2 0 0 1 -2 2h-10a2 2 0 0 1 -2 -2v-6"></path><path d="M11 16a1 1 0 1 0 2 0a1 1 0 0 0 -2 0"></path><path d="M8 11v-4a4 4 0 1 1 8 0v4"></path></svg></div><p style="font-size:var(--mantine-font-size-sm)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Ruby</p></div><h1 style="--title-fw:var(--mantine-h1-font-weight);--title-lh:var(--mantine-h1-line-height);--title-fz:var(--mantine-h1-font-size);margin-bottom:var(--mantine-spacing-xl)" class="m_8a5d1357 mantine-Title-root" data-order="1">Теория: Строки</h1><script type="application/ld+json">{"@context":"https://schema.org","@type":"LearningResource","name":"Строки","inLanguage":"ru","isPartOf":{"@type":"LearningResource","name":"Ruby"},"isAccessibleForFree":"False","hasPart":{"@type":"WebPageElement","isAccessibleForFree":"False","cssSelector":".paywalled"}}</script><div class=""><div style="--alert-color:var(--mantine-color-indigo-light-color);margin-bottom:var(--mantine-spacing-lg);font-size:var(--mantine-font-size-lg)" class="m_66836ed3 mantine-Alert-root" id="mantine-_R_remqrdub_" role="alert" aria-describedby="mantine-_R_remqrdub_-body" aria-labelledby="mantine-_R_remqrdub_-title"><div class="m_a5d60502 mantine-Alert-wrapper"><div class="m_667f2a6a mantine-Alert-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-rocket "><path d="M4 13a8 8 0 0 1 7 7a6 6 0 0 0 3 -5a9 9 0 0 0 6 -8a3 3 0 0 0 -3 -3a9 9 0 0 0 -8 6a6 6 0 0 0 -5 3"></path><path d="M7 14a6 6 0 0 0 -3 6a6 6 0 0 0 6 -3"></path><path d="M14 9a1 1 0 1 0 2 0a1 1 0 1 0 -2 0"></path></svg></div><div class="m_667c2793 mantine-Alert-body"><div class="m_6a03f287 mantine-Alert-title"><span id="mantine-_R_remqrdub_-title" class="m_698f4f23 mantine-Alert-label">Полный доступ к материалам</span></div><div id="mantine-_R_remqrdub_-body" class="m_7fa78076 mantine-Alert-message"><div style="--group-gap:var(--mantine-spacing-md);--group-align:center;--group-justify:space-between;--group-wrap:wrap" class="m_4081bf90 mantine-Group-root"><p class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Зарегистрируйтесь и получите доступ к этому и десяткам других курсов</p><a style="--button-height:var(--button-height-xs);--button-padding-x:var(--button-padding-x-xs);--button-fz:var(--mantine-font-size-xs);--button-bg:linear-gradient(45deg, var(--mantine-color-blue-filled) 0%, var(--mantine-color-cyan-filled) 100%);--button-hover:linear-gradient(45deg, var(--mantine-color-blue-filled) 0%, var(--mantine-color-cyan-filled) 100%);--button-color:var(--mantine-color-white);--button-bd:none" class="mantine-focus-auto mantine-active m_77c9d27d mantine-Button-root m_87cf2631 mantine-UnstyledButton-root" data-variant="gradient" data-size="xs" href="/u/new"><span class="m_80f1301b mantine-Button-inner"><span class="m_811560b9 mantine-Button-label">Зарегистрироваться</span></span></a></div></div></div></div></div><div class="paywalled m_d08caa0 mantine-Typography-root"><p>Базовые операции со строками в любом языке – это интерполяция и конкатенация. Как это делается на Ruby:</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code"># Конкатенация
name = 'H' + 'e' + 'x' + 'l' + 'e' + 't' # Hexlet
# Можно даже так
name = 'H' 'e' 'x' 'l' 'e' 't' # Hexlet
# Интерполяция
greeting = "hello #{name}" # hello Hexlet</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<p>Интерполяция выполняется только в строках с двойными кавычками. Строки, состоящие из одиночных кавычек, воспринимаются «как есть» — по аналогии с PHP.</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">line_feed = "one line\nanother one"
# one line
# another one</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<p>Как и в большинстве других языков, интерполяция в Ruby предпочтительнее конкатенации.</p>
<p>Помимо стандартных конкатенации и интерполяции, строки в Ruby усилены срезами и большим числом полезных методов. Вот лишь некоторые примеры:</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">name = 'ruby'
name.upcase # 'RUBY'
''.empty? # true
name.include? 'ru' # true
name.capitalize # Ruby
name.length # 4</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<p>Одна из самых классных возможностей у строк – слайсы. С их помощью можно находить любую подстроку в строке. Слайс — тоже метод, но с дополнительным синтаксисом из квадратных скобок:</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">name = 'ruby'
# второй символ (счёт идёт с нуля)
name[1] # u
# Последний символ
name[-1] # y
# два символа, начиная с нулевого индекса
name[0, 2] # ru
# от первого до второго с конца
name[0..-2] # rub
# от 4 с конца до последнего символа
name[-4..] # ruby
# и даже регулярные выражения!
name[/ru/] # ru</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div></div><div style="margin-block:var(--mantine-spacing-xl)" class=""><h2 style="--title-fw:var(--mantine-h2-font-weight);--title-lh:var(--mantine-h2-line-height);--title-fz:var(--mantine-h2-font-size);margin-bottom:var(--mantine-spacing-md)" class="m_8a5d1357 mantine-Title-root" data-order="2">Рекомендуемые программы</h2><style data-mantine-styles="inline">.__m__-_R_2mremqrdub_{--carousel-slide-gap:var(--mantine-spacing-xs);--carousel-slide-size:70%;}@media(min-width: 36em){.__m__-_R_2mremqrdub_{--carousel-slide-gap:var(--mantine-spacing-xl);--carousel-slide-size:50%;}}</style><div style="--carousel-control-size:calc(2.5rem * 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<div>ООО «<a href="/" class="text-decoration-none link-light">Хекслет Рус</a>»</div>
<div>108813 г. Москва, вн.тер.г. поселение Московский,</div>
<div>г. Московский, ул. Солнечная, д. 3А, стр. 1, помещ. 20Б/3</div>
<div>ОГРН 1217300010476</div>
<div>ИНН 7325174845</div>
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<div>АНО ДПО «<a href="/" class="text-decoration-none link-light">Учебный центр «Хекслет</a>»</div>
<div>119331 г. Москва, вн. тер. г. муниципальный округ</div>
<div>Ломоносовский, пр-кт Вернадского, д. 29</div>
<div>ОГРН 1247700712390</div>
<div>ИНН 7736364948</div>
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