* 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>
2.6 KiB
2.6 KiB
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,param1
和param2
:
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"
和"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--
- 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。 - 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);