We define a function named getMax with a parameter, ...args: number[]. We call Math.max() method passing argument, ...args. The three dots in the argument, ...args, works as spread operator. It spreads/ unpacks the elements of the array args.Open Compiler function getMax(...args...
The length property ignores the Rest Parameter. varshowCollections =function(id, ...collection){console.log(arguments.length); };showCollections(123,'movie','music'); vargetFirst =newFunction("...args"," return args[0]");console.log(getFirst(1,2)); The Spread Operator Spread Operator s...
We pass individual numbers as arguments and group them using the rest operator or the rest parameter.The rest parameter gives us an array so an essential use case would be where we have to implement certain functionality on certain values as a single entity. For example, using array methods ...
+ 5 ->The spread operator allows us to spread the value of an array (or any iterable) across zero or more arguments in a function or elements in an array (or any iterable). ->The rest parameter allows us to pass an indefinite number of parameters to a function and access them in an...
log(sum(1, 2, 3, 4, 5, 6, 7, 8, 9)); // SyntaxError: Rest parameter must be last formal parameter CopyConclusionIn this article, we saw how visually same the spread operator (...) and the rest operator (...) are different from each other. We also saw how to use them in ...
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Rest parameter ( … ) It provides an improved way of handling parameters of a function. Using the rest parameter syntax, we can create functions that can take a variable number of arguments. Any number of arguments will be converted into an array using the rest parameter. ...
typescript 40 Parameter Properties 1080p 03:37 typescript 43 declare a function type 1080p 08:48 typescript 69 完结 1080p 05:59 typescript 64 Generic Type Aliases-.1080p 02:36 typescript 55 generics --- class 1080p 06:23 typescript 47 Type ---Guards 2 1080p 09:40 typescri...
参数默认值,剩余参数,拓展参数(default spread rest parameter) 默认参数 letaa=(name='wwrs')=>{console.log(`Hello${name}`); }aa();//Hello wwrsaa('sss');//Hello sss 扩展参数 letbb=(a,b,c)=>{console.log(a+b+c);//9}letdd=[2,3,4];bb(...dd); ...
I recently wrote an article on how to conditionally spread objects in JavaScript. In that article, I mentioned that the spread operator (...) can be used to spread the properties of an object.