freeCodeCamp/replacing-if-else-chains-with-switch.russian.md at c3adb60957a055655a60daa5655606720192f03d

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Beau Carnes 2ca3a2093f Add languages Russian, Arabic, Chinese, Portuguese (#18305 )

2018-10-11 03:33:03 +05:30

4.1 KiB

Raw Blame History

id, title, challengeType, videoUrl, localeTitle

id	title	challengeType	videoUrl	localeTitle
56533eb9ac21ba0edf2244e0	Replacing If Else Chains with Switch	1		Замена остальных цепей коммутатором

Description

Если у вас есть много вариантов на выбор, оператор switch может быть проще писать, чем многие прикованные if / else if . Следующие:

если (val === 1) {
answer = "a";
} else if (val === 2) {
answer = "b";
} else {
answer = "c";
}

можно заменить на:

switch (val) {
Дело 1:
answer = "a";
ломать;
случай 2:
answer = "b";
ломать;
по умолчанию:
answer = "c";
}

Instructions

Измените прикованные инструкции if / else if оператор switch .

Tests

tests:
  - text: Вы не должны использовать никаких <code>else</code> утверждений в любом месте редактора
    testString: 'assert(!/else/g.test(code), "You should not use any <code>else</code> statements anywhere in the editor");'
  - text: Вы не должны использовать какие-либо инструкции <code>if</code> в редакторе
    testString: 'assert(!/if/g.test(code), "You should not use any <code>if</code> statements anywhere in the editor");'
  - text: Вы должны иметь по крайней мере четыре <code>break</code> заявления
    testString: 'assert(code.match(/break/g).length >= 4, "You should have at least four <code>break</code> statements");'
  - text: <code>chainToSwitch(&quot;bob&quot;)</code> должен быть &quot;Marley&quot;
    testString: 'assert(chainToSwitch("bob") === "Marley", "<code>chainToSwitch("bob")</code> should be "Marley"");'
  - text: <code>chainToSwitch(42)</code> должен быть «Ответ»
    testString: 'assert(chainToSwitch(42) === "The Answer", "<code>chainToSwitch(42)</code> should be "The Answer"");'
  - text: <code>chainToSwitch(1)</code> должен быть «Нет №1»
    testString: 'assert(chainToSwitch(1) === "There is no #1", "<code>chainToSwitch(1)</code> should be "There is no #1"");'
  - text: <code>chainToSwitch(99)</code> должен быть «пропустил меня этим!»
    testString: 'assert(chainToSwitch(99) === "Missed me by this much!", "<code>chainToSwitch(99)</code> should be "Missed me by this much!"");'
  - text: <code>chainToSwitch(7)</code> должен быть «Ate Nine»
    testString: 'assert(chainToSwitch(7) === "Ate Nine", "<code>chainToSwitch(7)</code> should be "Ate Nine"");'
  - text: <code>chainToSwitch(&quot;John&quot;)</code> должен быть «» (пустая строка)
    testString: 'assert(chainToSwitch("John") === "", "<code>chainToSwitch("John")</code> should be "" (empty string)");'
  - text: <code>chainToSwitch(156)</code> должен быть «&quot; (пустая строка)
    testString: 'assert(chainToSwitch(156) === "", "<code>chainToSwitch(156)</code> should be "" (empty string)");'

Challenge Seed

function chainToSwitch(val) {
  var answer = "";
  // Only change code below this line

  if (val === "bob") {
    answer = "Marley";
  } else if (val === 42) {
    answer = "The Answer";
  } else if (val === 1) {
    answer = "There is no #1";
  } else if (val === 99) {
    answer = "Missed me by this much!";
  } else if (val === 7) {
    answer = "Ate Nine";
  }

  // Only change code above this line
  return answer;
}

// Change this value to test
chainToSwitch(7);

Solution

// solution required

4.1 KiB Raw Blame History Unescape Escape