Category：Regular Expression
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Time：2020-1-24
1. Regular is only used to process strings: match, capture Match: verify that the current string conforms to our rules (each rule is a rule)Capture: in the whole string, get the characters that meet the rules in turn to — > exec, match, replace 2. Regular composition: metacharacter, modifier Meta character: Special metacharacters: \D matching […]
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Time：2020-1-23
Mind mapping introduce Regular expressions are often used in development. Now many development languages have regular expression applications, such as JavaScript, Java,. Net, PHP, etc. I will nag you about my understanding of regular expressions today. Please give me more advice on the improper points! Terms to know – how much do you know about […]
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Time：2020-1-22
Regexp direct quantity and object creation Just like strings and numbers, it is obvious that every primitive type direct quantity in a program that takes the same value represents the same value. The program creates new objects every time it encounters object direct quantities (initialization expressions), such as {} and []. For example, if you […]
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Time：2020-1-21
In this article, I have written 12 super useful regular expressions, which are the favorite of web developers. 1. In the input box, you can only enter the amount, in fact, you can only enter a number with two decimal places at most //The first is limited in the input input field < input type […]
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Time：2020-1-19
No more nonsense, just post regular expression code for you. function myValid() { var errorMsg = “”; var res = true; //Get the value to verify Var receivename = $(“#receivename”). Val(); // name Var receivemobile = $(“ාtmobile”). Val(); // mobile number Var validcode = $(“#validcode”). Val(); // verification code Var regname = / ^ [\ […]
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Time：2020-1-18
Var recat = new regexp (“cat”, “GI”); // the regexp constructor can take one or two parameters, the first parameter describes the pattern string to be matched, and the second parameter specifies additional processing commands Var recat = / cat / GI; // use Perl style syntax i: Perform case insensitive matching g: Perform a […]
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Time：2020-1-17
Although developpaer has not published many regular expression tutorials before, this article is still good. No nonsense is more practical. The premise is that you need to know some regular expressions before, or read some basic regular expression tutorials first. ————————————————————————- ^And $are used to match the start and end of a string, respectively ————————————————————————- […]
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Time：2020-1-16
1、 Regular expressions removing line numbers As developers, we often copy some codes from the Internet. Sometimes the copied codes are preceded by line numbers, such as: MyEclipse has its own find and replace function and supports regular expression replacement. Using regular replacement can easily remove these line numbers Using shortcut keys“ctrl+F”Open the find and […]
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Time：2020-1-15
Regular expression:Search, replace and extract the information in the string. (comments and blanks are not supported and must be written in one line) Regular expression creation:Characters contained between a pair of slashes (direct quantity syntax)For example: Var pattern = / S $/; // create a regular to match all strings ending in the letter S […]
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Time：2020-1-14
1、 JS regular expression‘s replace function usage: Function functions:The replace function returns a copy of a string after a literal replacement based on a regular expression. Function format:stringObj.replace(rgExp, replaceText) Parameters:String obj, rgexp regular expression, replacetextThe content of this module includes string creation, regular expression implicitly creating objects, creating regular expressions, and matching replacement methodsExample code: […]
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Time：2020-1-13
Methods of regular expression objects 1、test,Returns a Boolean value indicating whether a pattern exists in the string being looked up. Returns true if it exists, false otherwise. 2、exec,Runs a lookup in a string in regular expression mode and returns an array containing the result of the lookup. 3、compile,The regular expression is compiled into an internal […]
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Time：2020-1-12
Regular expression syntax is not much to say, you can search and consult the relevant information to learn. The examples in this article are seen in “the essence of JavaScript language”. After reading it, I have a further understanding of regular expressions, so I share it. Example //This is a regular expression used to match […]
