The simplest use of Regular Expressions is to find a plain text pattern. In this lesson we'll look at at finding plain text patterns as well as using the metacharacter "." and how to escape a metacharacter.

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="UTF-8">

  <title>Javascript Regular Expressions: Find Plain Text Patterns</title>

  <style>

    pre {

      line-height: 2;

    }

    span {

      background-color: #eee;

      padding: 1px;

      outline: 1px solid #999;

    }

  </style>

</head>

<body>

  <pre></pre>

</body>

</html>
'use strict';

var str = `Cat

sat on

the hat.`;

var regex = /..\./g  //any two charaters follow by a '.'

/**

 * @param  String str

 * @param  RegExp regex

 * @param  HTMLElement target

 */

const output = (str, regex, target) => {

  target.innerHTML =

    str.replace(regex, str =>

      `<span>${str}</span>`

    );

}

output(str, regex, document.querySelector('pre'));

[Regular Expressions] Find Plain Text Patterns的更多相关文章

  1. Regular Expressions in Grep Command with 10 Examples --reference

    Regular expressions are used to search and manipulate the text, based on the patterns. Most of the L ...

  2. 正则表达式（Regular expressions）使用笔记

    Regular expressions are a powerful language for matching text patterns. This page gives a basic intr ...

  3. PCRE Perl Compatible Regular Expressions Learning

    catalog . PCRE Introduction . pcre2api . pcre2jit . PCRE Programing 1. PCRE Introduction The PCRE li ...

  4. 8 Regular Expressions You Should Know

    Regular expressions are a language of their own. When you learn a new programming language, they're ...

  5. Regular Expressions --正则表达式官方教程

    http://docs.oracle.com/javase/tutorial/essential/regex/index.html This lesson explains how to use th ...

  6. Introducing Regular Expressions 学习笔记

    Introducing Regular Expressions 读书笔记 工具: regexbuddy:http://download.csdn.net/tag/regexbuddy%E7%A0%B4 ...

  7. [转]8 Regular Expressions You Should Know

    Regular expressions are a language of their own. When you learn a new programming language, they're ...

  8. Finding Comments in Source Code Using Regular Expressions

    Many text editors have advanced find (and replace) features. When I’m programming, I like to use an ...

  9. Python re module (regular expressions)

    regular expressions (RE) 简介 re模块是python中处理正在表达式的一个模块 r"""Support for regular expressi ...

随机推荐

  1. CCArray(转)

    http://blog.csdn.net/passtome/article/details/7966451 CCArray也是cocos2d-x自己写的类.它相当于是objc的NSArray.在coc ...

  2. PHP页面之间跳转方法总结

    编程中,在页面之间进行跳转是必须的.这里列出了三种办法,供参考. 一.用HTTP头信息 也就是用PHP的HEADER函数.PHP里的HEADER函数的作用就是向浏览器发出由HTTP协议规定的本来应该通 ...

  3. 显示目录树命令tree

    -a:显示所有文件,包括隐藏文件 -d:只显示目录 -f:显示完整的文件名,包含路径 -L:显示目录树的深度 [root@rusky /]# tree -L -a -f /home /home |-- ...

  4. 使用OpenXml实现生成数据字典文档(beta)

    最近项目在走验收流程,之前没有仔细看SOW文档,发现需要补好多份文档,其中就有数据字典,项目组不愿意花时间太多的时间弄这些文档,也不希望以后还要重复劳动力,最终决定做一个工具,方便自己生成数据字典文档 ...

  5. C#调用cmd 脚本实例

    1.实例1 public static void TestOne() { Process p = new Process(); p.StartInfo.FileName = "cmd.exe ...

  6. CGRectInset CGRectoffset UIEdgeInsetsInsetRect 这三个函数的使用情况

    //CGRectInset 将原来的矩形放大或者缩小,正表示缩小,-表示放大. CGRect rect= CGRectMake(20, 50, 100, 80); CGRect rect1=CGRec ...

  7. ios中模拟延时的几种方法

    - (void)delay1 {     // 延迟执行不要用sleep,坏处:卡住当前线程     [NSThread sleepForTimeInterval:3];     NSLog(@&qu ...

  8. Swift中构造器的继承和重写

    import Foundation /* 构造器的继承: Swift的子类不会自动继承父类的构造器, 若继承, 则满足如下规则: 1.如果子类没有提供任何指定构造器, 那么它将自动继承父类的所有指定构 ...

  9. ArrayList 练习

    ArrayList list = new ArrayList(); Random rd = new Random(); ; i <; i++) { , ); //是否包含当前数字 if (!li ...

  10. 东软实训4-JDBC连接数据库

    JDBC(Java Data Base Connectivity,java数据库连接)是一种用于执行SQL语句的Java API,可以为多种关系数据库提供统一访问,它由一组用Java语言编写的类和接口 ...