regex

问题 Rule: field must contain at least 2 non-space alphanumeric characters. please any one can guide us how to write the regular expression thanks in advance.... 回答1: Match one alphanumeric character followed by zero or more characters followed by another alphanumeric character: \w.*\w If the validation automatically adds ^ and $, you have to match the characters before and after also: .*\w.*\w.* The \w code matches A-Z, a-z, 0-9 and _. If you have a different definition for aplhanumeric

问题 I have the following regex: Regex pattern = new Regex(@"^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])[0-9a-zA-Z]{8,20}/(.)$"); (?=.*\d) //should contain at least one digit (?=.*[a-z]) //should contain at least one lower case (?=.*[A-Z]) //should contain at least one upper case [a-zA-Z0-9]{8,20} //should contain at least 8 characters and maximum of 20 My problem is I also need to check if 3 consecutive characters are identical. Upon searching, I saw this solution: /(.)\1\1/ However, I can't make it to work

问题 I'm trying to remove rows from my data frame that contain less than 5 words. e.g. mydf <- as.data.frame(read.xlsx("C:\\data.xlsx", 1, header=TRUE) head(mydf) NO ARTICLE 1 34 The New York Times reports a lot of words here. 2 12 Greenwire reports a lot of words. 3 31 Only three words. 4 2 The Financial Times reports a lot of words. 5 9 Greenwire short. 6 13 The New York Times reports a lot of words again. I want to remove rows with 5 or less words. how can i do that? 回答1: Here are two ways:

问题 I have a Google spreadsheet with 2 columns. Each cell of the first one contains JSON data, like this: { "name":"Love", "age":56 }, { "name":"You", "age":42 } Then I want a second column that would, using a formula, extract every value of name and string it like this: Love,You Right now I am using this formula: =REGEXEXTRACT(A1, CONCATENER(CHAR(34),"name",CHAR(34),":",CHAR(34),"([^",CHAR(34),"]+)",CHAR(34),",")) The RegEx expresion being "name":"([^"]+)", The problem being that it currently

问题 I have a Google spreadsheet with 2 columns. Each cell of the first one contains JSON data, like this: { "name":"Love", "age":56 }, { "name":"You", "age":42 } Then I want a second column that would, using a formula, extract every value of name and string it like this: Love,You Right now I am using this formula: =REGEXEXTRACT(A1, CONCATENER(CHAR(34),"name",CHAR(34),":",CHAR(34),"([^",CHAR(34),"]+)",CHAR(34),",")) The RegEx expresion being "name":"([^"]+)", The problem being that it currently

问题 I have a string of following types: a1 = 'images1subimages1/folder100/hello1.png' a1 = 'images1subimages1 folder100 hello1.png' a1 = 'images1subimages1folder100hello1.png' a1 = 'images1b100d1.png' The first Integer of the string is num0 and we only care about it. We want to increase all occurrence of num0 by one and keep other numbers the same. Required: a2 = 'images2subimages2/folder100/hello2.png' a2 = 'images2subimages2 folder100 hello2.png' a2 = 'images2subimages2folder100hello2.png' a2 =

问题 I have a string of following types: a1 = 'images1subimages1/folder100/hello1.png' a1 = 'images1subimages1 folder100 hello1.png' a1 = 'images1subimages1folder100hello1.png' a1 = 'images1b100d1.png' The first Integer of the string is num0 and we only care about it. We want to increase all occurrence of num0 by one and keep other numbers the same. Required: a2 = 'images2subimages2/folder100/hello2.png' a2 = 'images2subimages2 folder100 hello2.png' a2 = 'images2subimages2folder100hello2.png' a2 =

问题 Any simple unicode string like زسس or یسیتنانت matches in c# regex using the following pattern but they don’t match in java. Can anyone explain this? How do I correct it for it to work in Java? "\\b[\\w\\p{M}\\u200B\\u200C\\u00AC\\u001F\\u200D\\u200E\\u200F]+\\b" c# code :(it matches the strings) private static readonly Regex s_regexEngine; private static readonly string s_wordPattern = @"\b[\w\p{M}\u200B\u200C\u00AC\u001F\u200D\u200E\u200F]+\b"; static PersianWordTokenizer() { s_regexEngine

问题 How to extract data from HTML table in PHP. The data is in this format Table 1 <tr><td class="body" valign="top"><a href="example"><b>DATA</b></a></td><td class="body" valign="top">Data_Text</td></tr> Table 2 <tr><th><div id="Data">Data</div></th><td>Data_Text_1</td><td>Data_Text_2</td></tr> Table 3 <tr><td width="120"><a href="example" target="_blank">DATA</a></td><td>Data_Text</td></tr> I want to get the Data & Data_Text or (Data_Text_1 & Data_Text_2) from the 3 tables . I've used $html =

问题 I'm trying to write a simple text replacer in React.js using a regular expression but I can't wrap my head around it. So I've got a list of tokens and their corresponding replacement text. I also have a text area with text written by the user. Whenever a word is wrapped around { } the text will be replaced with the replacement text of the corresponding token. For example if I have a {example} somewhere in my textarea I will have to check my tokenlist and see if I have the value example in the