Menu
How does the Math.max.apply() work?.
<!DOCTYPE html> <html> <head> <meta charset=utf-8 /> <title>JS Bin</title> </head> <body> <script> var list = ["12","23","100","34","56", "9","233"]; console.log(Math.max.apply(Math,list)); </script> </body> </html> https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/max
The above code finds the Max number in the List. Can anyone tell me how does the below code work?. It seems it works if i pass null or Math.
console.log(Math.max.apply(Math,list)); Does all the user-defined/Native functions have call and apply method which we can use?.
243
max() The Math. max() function returns the largest of the zero or more numbers given as input parameters, or NaN if any parameter isn't a number and can't be converted into one.
when you execute Math. min(), you will get (Infinity) and when you execute Math. max(), you will get (-Infinity). by this result for sure if you compare Math.
max(int a, int b) returns the greater of two int values. That is, the result is the argument closer to positive infinity. If the arguments have the same value, the result is that same value.
max is returning -Infinity when there is no argument passed. If no arguments are given, the result is -∞. So when you spread an empty array in a function call, it is like calling the function without an argument. But the result is negative infinity, not positive.
apply accepts an array and it applies the array as parameters to the actual function. So,
Math.max.apply(Math, list); can be understood as,
Math.max("12", "23", "100", "34", "56", "9", "233"); So, apply is a convenient way to pass an array of data as parameters to a function. Remember
console.log(Math.max(list)); # NaN will not work, because max doesn't accept an array as input.
There is another advantage, of using apply, you can choose your own context. The first parameter, you pass to apply of any function, will be the this inside that function. But, max doesn't depend on the current context. So, anything would work in-place of Math.
console.log(Math.max.apply(undefined, list)); # 233 console.log(Math.max.apply(null, list)); # 233 console.log(Math.max.apply(Math, list)); # 233 Since apply is actually defined in Function.prototype, any valid JavaScript function object, will have apply function, by default.
178
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
