How to use the JavaScript ratio function

This article mainly introduces the relevant knowledge of how to use the JavaScript ratio function, the content is detailed and easy to understand, the operation is simple and fast, and has a certain reference value. I believe you will gain something after reading this JavaScript ratio function. Let's take a look at it.

JavaScript ratio function

The purpose of the comparison function is to define another sort order.

The comparison function should return a negative, zero, or positive value, depending on the parameter:

Function (a, b) {return Amurb}

When the sort () function compares two values, it sends the values to the comparison function and sorts them based on the values returned (negative, zero, or positive).

Example:

When comparing 40 and 100, the sort () method calls the comparison function function (40100).

This function calculates 40-100 and returns-60 (negative).

The sort function will sort 40 to a value lower than 100.

You can use the following code snippet to test numeric and alphabetical ordering:

Sort in numerical order

Var points = [40,100,1,5,25,10]

Document.getElementById ("demo"). InnerHTML = points

Function myFunction1 () {

Points.sort ()

Document.getElementById ("demo"). InnerHTML = points

}

Function myFunction2 () {

Points.sort (function (a, b) {return a-b})

Document.getElementById ("demo"). InnerHTML = points

}

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