Deleting elements
There are several ways to delete elements from a list. If you know the index of the element you want, you can use pop:
pop modifies the list and returns the element that was removed.
If you don’t need the removed value, you can use del operator:
If you know the element you want to remove (but not the index), you can use remove:
The return value from remove is None.
To remove more than one element, you can use del with a slice index:
As usual, the slice selects all elements up to, but not including, the second index.
from Thinking in Python
Deleting elements的更多相关文章
- Array类
class Array Arrays are ordered, integer-indexed collections of any object. Array indexing starts at ...
- Java性能提示(全)
http://www.onjava.com/pub/a/onjava/2001/05/30/optimization.htmlComparing the performance of LinkedLi ...
- Think Python - Chapter 10 - Lists
10.1 A list is a sequenceLike a string, a list is a sequence of values. In a string, the values are ...
- vector list array deque
因此在实际使用时,如何选择这三个容器中哪一个,应根据你的需要而定,一般应遵循下面 的原则: 1.如果你需要高效的随即存取,而不在乎插入和删除的效率,使用vector 2.如果你需要大量的插入和 ...
- Unix Shells: Bash, Fish, Ksh, Tcsh, Zsh
Hyperpolyglot Unix Shells: Bash, Fish, Ksh, Tcsh, Zsh grammar | quoting and escaping | charactersvar ...
- Multidimensional Arrays
Overview An array having more than two dimensions is called a multidimensional array in the MATLAB® ...
- Dom4j学习笔记
一.Loading XML Data 以下代码从File中或一个URL中读取一个XML文件,并产生一个Document对象.一个Document对象表示了内存中的一棵XML树,可以在这个XML树中进行 ...
- Ultimate guide to learning AngularJS in one day
What is AngularJS? Angular is a client-side MVC/MVVM framework built in JavaScript, essential for mo ...
- Read-Copy Update Implementation For Non-Cache-Coherent Systems
A technique for implementing read-copy update in a shared-memory computing system having two or more ...
随机推荐
- POJ 3749
第一道简单密码学的题,太水了,本不打算做,第一道,还是纪念一下. #include <iostream> #include <cstdio> #include <cstr ...
- jqMobi(App Framework)入门学习(一)
jqMobi(App Framework)入门学习(一) 1. 什么是jqMobi? jqMobi是由appMobi针对HTML5浏览器和移动设备开发的javascript框架.是个极其高速的查询选择 ...
- leetCode(46):Kth Smallest Element in a BST
Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. Not ...
- m_Orchestrate learning system---十四、数据表中字段命名规则
m_Orchestrate learning system---十四.数据表中字段命名规则 一.总结 一句话总结:a.保证唯一 b.见名知意 1.注意php中的数组类函数和字符串类函数的前缀? 数组类 ...
- _itoa进制转换
#define _CRT_SECURE_NO_WARNINGS #include <stdlib.h> #include <stdio.h> void main() { int ...
- (转载)Android项目实战(二十八):使用Zxing实现二维码及优化实例
Android项目实战(二十八):使用Zxing实现二维码及优化实例 作者:听着music睡 字体:[增加 减小] 类型:转载 时间:2016-11-21我要评论 这篇文章主要介绍了Android项目 ...
- 用Maven创建第一个web项目Struts2项目
一.创建一个web项目 参考前面文章,项目名:maven-struts-demo. 二.配置pom.xml文件添加struts2依赖 <project xmlns="http://ma ...
- passwd文件
1.查看/etc/passwd [admin@localhost /]$ cat -n /etc/passwd 1 root:x:0:0:root:/root:/bin/bash 2 bin:x:1: ...
- nginx的location 匹配的规则问题
正则解释: ~ #匹配一个正则匹配,区分大小写~* #匹配一个正则,不区分大小写^~ #普通字符匹配,如果该选择匹配不匹配别的选项,一般用来匹配目录= #精确匹配 匹配案例:location = / ...
- RocketMQ学习笔记(2)----Broker的集群四种方式
RocketMQ推荐了几种Broker集群方式,这里的Slave不可写,但可读,类似于Mysql主备方式 1. 单个Master 这是一种风险比较大的集群方式,因为一旦Borker重启或宕机期间,将会 ...