ColdFusion中的正則表達式

Question

如何使用rereplace修剪前導零和尾隨零？

它與一個插入符號和一個星星和一個美元符號有關。

和0。

這裏有一個備忘單： http://www.petefreitag.com/cheatsheets/regex/

Answer 1

reReplace(string, "^0*(.*?)0*$", "$1", "ALL") 

即：

^ = starting with 
0* = the character "0", zero or more times 
() = capture group, referenced later as $1 
.* = any character, zero or more times 
*? = zero or more, but lazy matching; try not to match the next character 
0* = the character "0", zero or more times, this time at the end 
$ = end of the string 

Answer 2

<cfset newValue = REReplace(value, "^0+|0+$", "", "ALL")> 

Answer 3

我不是一個ColdFusion的專家，但像，更換所有^ 0 + 0 + $的空字符串，例如：

REReplace("000xyz000","^0+|0+$","") 

Answer 4

這似乎工作..會檢查你的用例。

<cfset sTest= "0001" /> 
<cfset sTest= "leading zeros? 0001" /> 
<cfset sTest= "leading zeros? 0001.02" /> 
<cfset sTest= "leading zeros? 0001." /> 
<cfset sTest= "leading zeros? 0001.2" /> 

<cfset sResult= reReplace(sTest , "0+([0-9]+(\.[0-9]+)?)" , "\1" , "all") /> 

Answer 5

以上根本不起作用，除了布拉德利的回答！

在ColdFusion中，爲了引用捕獲組，您需要\而不是$，例如， \1而不是$1。

所以正確答案是：

reReplace(string, "^0*(.*?)0*$", "\1", "ALL") 

即：

^ = starting with 
0* = the character "0", zero or more times 
() = capture group, referenced later as $1 
.* = any character, zero or more times 
*? = zero or more, but lazy matching; try not to match the next character 
0* = the character "0", zero or more times, this time at the end 
$ = end of the string 

和：

\1 reference to capture group 1 (see above, introduced by () 

Answer 6

這個職位是很老，但我張貼的情況下，任何人發現它很有用。我發現自己需要多次修剪自定義字符，所以我想分享一下我寫的最近的幫手，如果您覺得它有用，可以使用rereplace修剪任何自定義字符。它和普通修剪一樣工作，但可以傳遞任何自定義字符串作爲第二參數，它將修剪所有前導/尾隨字符。

/** 
    * Trims leading and trailing characters using rereplace 
    * @param string - string to trim 
    * @param string- custom character to trim 
    * @return string - result 
    */ 
    function $trim(required string, string customChar=" "){ 
     var result = arguments.string; 

     var char = len(arguments.customChar) ? left(arguments.customChar, 1) : ' '; 

     char = reEscape(char); 

     result = REReplace(result, "#char#+$", "", "ALL"); 
     result = REReplace(result, "^#char#+", "", "ALL"); 

     return result; 
    } 

你的情況，你可以使用這個幫手做這樣的事情：

string = "0000foobar0000"; 
string = $trim(string, "0"); 
//string now "foobar" 

希望這可以幫助別人:)