这篇文章是免费Java 8 课程中关于Clean Code原则的一部分。在这篇文章中,我们要聊一聊Java Comparable接口。还有一个不错的视频可以点这里。Comparable接口时用来干什么的呢?我们应该如何对事物进行比较和排序?这问题听上去有点莫名其妙,但我希望你认真考虑一下。比方说,我们有一组苹果:例1我们要怎样对它们进行排序呢?我们希望通过重量进行排序吗?如果是的话,排序是从最轻到最重还是从最重到最轻?当我们对它们进行排序的时候,我们需要反复比较两个苹果的重量,直到正确地排好所有的苹果。苹果1比苹果2重?那它比苹果3重吗?我们需要不断比较,直到完成排序。Comparable接口可以帮助我们实现这一目标。Comparable本身不能对对象进行排序,但接口定义的方法 int compareTo(T)可以。compareTo(T)如何工作让我们通过使用compareTo()方法来
简介:这篇文章是免费Java 8 课程中关于Clean Code原则的一部分。在这篇文章中,我们要聊一聊Java Comparable接口。还有一个不错的视频可以点这里。Comparable接口时用来干什么的呢?我们应该如何对事物进行比较和排序?这问题听上去有点莫名其妙,但我希望你认真考虑一下。比方说,我们有一组苹果:例1我们要怎样对它们进行排序呢?我们希望通过重量进行排序吗?如果是的话,排序是从最轻到...
简介:Java8比较器-如何对List排序详解在本文中,我们将看到几个关于如何在Java 8中对List进行排序的例子。按字母排序字符串列表List<String> cities = Arrays.asList( "Milan",
简介:Java8比较器-如何对List排序详解在本文中,我们将看到几个关于如何在Java 8中对List进行排序的例子。按字母排序字符串列表List<String> cities = Arrays.asList( "Milan",
简介:PHP数组的倒序在一篇文章《如何对PHP数组进行排序》中我们介绍了sort、asort和ksort,它们都是按照升序来对数组进行排序的,那么如果要实现数组的倒序呢?下面就是我们要说的另一组函数:rsort、arsort、krsort下面我们将一一介绍这组函数!rsortrsort —对数值数组进行降序排序。rsort() 函数对数组的元素按照键值进行逆向排序。与 arsort() 的功能...
Introduction: Reverse order of PHP arrays In an article "How to Sort PHP Arrays" we introduced sort, asort and ksort. They all sort arrays in ascending order. So if you want to implement What about the reverse order of the array? Here is another set of functions we are going to talk about: rsort, arsort, krsort. Below we will introduce this set of functions one by one! rsortrsort —Sorts a numeric array in descending order. The rsort() function sorts the elements of an array in reverse order by key value. With the function of arsort()...
6. 10 recommended articles about the php ksort() function
Introduction: Reverse order of PHP arrays In an article "How to Sort PHP Arrays" we introduced sort, asort and ksort, which are all in ascending order To sort the array, what if you want to implement the reverse order of the array? Here is another set of functions we are going to talk about: rsort, arsort, krsort. Below we will introduce this set of functions one by one! rsortrsort —Sorts a numeric array in descending order. The rsort() function sorts the elements of an array in reverse order by key value. With the function of arsort()...
7. 10 recommended articles about the php krsort() function
Introduction: Reverse order of PHP arrays In an article "How to Sort PHP Arrays" we introduced sort, asort and ksort, which are all in ascending order To sort the array, what if you want to implement the reverse order of the array? Here is another set of functions we are going to talk about: rsort, arsort, krsort. Below we will introduce this set of functions one by one! rsortrsort —Sorts a numeric array in descending order. The rsort() function sorts the elements of an array in reverse order by key value. With the function of arsort()...
8. 10 recommended articles about the php asort() function
## Introduction: Reverse order of PHP arrays In an article "How to Sort PHP Arrays" we introduced sort, asort and ksort, which are all in ascending order To sort the array, what if you want to implement the reverse order of the array? Here is another set of functions we are going to talk about: rsort, arsort, krsort. Below we will introduce this set of functions one by one! rsortrsort —Sorts a numeric array in descending order. The rsort() function sorts the elements of an array in reverse order by key value. With the function of arsort()...
9. Recommended 10 articles about the php arsort() function
Introduction: Reverse order of PHP arrays In an article "How to Sort PHP Arrays" we introduced sort, asort and ksort, which are all in ascending order To sort the array, what if you want to implement the reverse order of the array? Here is another set of functions we are going to talk about: rsort, arsort, krsort. Below we will introduce this set of functions one by one! rsortrsort —Sorts a numeric array in descending order. The rsort() function sorts the elements of an array in reverse order by key value. With the function of arsort()...
10. 10 recommended articles about php array_splice()
Introduction: PHP array interception, equal division and replacement of part of the array. In this article, we will introduce the interception of the array (array_slice), equal division (array_chunk) and replacement ( array_splice) and the difference between array_slice and array_splice! In the previous three articles "How to sort PHP arrays?" "Random shuffle and reverse order of PHP arrays" and "Reverse order of PHP arrays", we introduced the sorting of arrays, including ascending and descending order of arrays. As well as disorder and reverse order, I believe everyone is familiar with arithmetic...
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