Oliver Eyton-Williams ee1e8abd87
feat(curriculum): restore seed + solution to Chinese (#40683)
* feat(tools): add seed/solution restore script

* chore(curriculum): remove empty sections' markers

* chore(curriculum): add seed + solution to Chinese

* chore: remove old formatter

* fix: update getChallenges

parse translated challenges separately, without reference to the source

* chore(curriculum): add dashedName to English

* chore(curriculum): add dashedName to Chinese

* refactor: remove unused challenge property 'name'

* fix: relax dashedName requirement

* fix: stray tag

Remove stray `pre` tag from challenge file.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
2021-01-12 19:31:00 -07:00

2.6 KiB
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id, title, challengeType, videoUrl, forumTopicId, dashedName
id title challengeType videoUrl forumTopicId dashedName
56533eb9ac21ba0edf2244bd 将值传递给带有参数的函数 1 https://scrimba.com/c/cy8rahW 18254 passing-values-to-functions-with-arguments

--description--

函数的参数parameters在函数中充当占位符(也叫形参)的作用,参数可以为一个或多个。调用一个函数时所传入的参数为实参,实参决定着形参真正的值。简单理解:形参即形式、实参即内容。

这是带有两个参数的函数,param1param2

function testFun(param1, param2) {
  console.log(param1, param2);
}

接着我们调用testFun testFun("Hello", "World"); 我们传递了两个参数,"Hello""World"。在函数内部,param1等于“Hello”param2等于“World”。请注意testFun函数可以多次调用,每次调用时传递的参数会决定形参的实际值。

--instructions--

  1. 创建一个名为functionWithArgs的函数,它可以接收两个参数,计算参数的和,将结果输出到控制台。
  2. 调用这个函数。

--hints--

functionWithArgs应该是一个函数。

assert(typeof functionWithArgs === 'function');

functionWithArgs(1,2)应该输出3

if (typeof functionWithArgs === 'function') {
  capture();
  functionWithArgs(1, 2);
  uncapture();
}
assert(logOutput == 3);

functionWithArgs(7,9)应该输出16

if (typeof functionWithArgs === 'function') {
  capture();
  functionWithArgs(7, 9);
  uncapture();
}
assert(logOutput == 16);

在你定义functionWithArgs之后记得调用它。

assert(/^\s*functionWithArgs\s*\(\s*\d+\s*,\s*\d+\s*\)\s*;?/m.test(code));

--seed--

--before-user-code--

var logOutput = "";
var originalConsole = console
function capture() {
    var nativeLog = console.log;
    console.log = function (message) {
        if(message) logOutput = JSON.stringify(message).trim();
        if(nativeLog.apply) {
          nativeLog.apply(originalConsole, arguments);
        } else {
          var nativeMsg = Array.prototype.slice.apply(arguments).join(' ');
          nativeLog(nativeMsg);
        }
    };
}

function uncapture() {
  console.log = originalConsole.log;
}

capture();

--after-user-code--

uncapture();

if (typeof functionWithArgs !== "function") { 
  (function() { return "functionWithArgs is not defined"; })();
} else {
  (function() { return logOutput || "console.log never called"; })();
}

--seed-contents--

--solutions--

function functionWithArgs(a, b) {
  console.log(a + b);
}
functionWithArgs(10, 5);