基于非贪婪的正则表达式替换javascript

Question

我想在javascript中使用非贪婪的正则表达式替换字符串，如：

"blank blank this is blank blank my blank channel for blank blank blank blank audio video transcription blank blank blank blank blank"

我正在寻找一种解决方案，可以全局替换多个blank连续出现的单blank。对于上面的字符串，结果应该是： blank this is blank my blank channel for blank audio video transcription blank

Answer 1

您不需要非贪婪的匹配。使用

/\bblank( blank)+\b/g

Answer 2

描述

此正则表达式将执行以下操作：

• 查找public static double[] createArray (int n, Scanner enter){ double[] tempArray = new double[n]; int pos=0; while (enter.hasNext()) { tempArray[pos++] = enter.nextDouble(); if (pos>=n) break; } return tempArray; } 后跟空格或字符串结尾的所有实例
• 捕获多个连续实例

正则表达式：blank

替换为：(blank(?:\s+|$))+

解释

$1

实施例

示例文字

NODE                     EXPLANATION
----------------------------------------------------------------------
  (                        group and capture to \1 (1 or more times
                           (matching the most amount possible)):
----------------------------------------------------------------------
    blank                    'blank'
----------------------------------------------------------------------
    (?:                      group, but do not capture:
----------------------------------------------------------------------
      \s+                      whitespace (\n, \r, \t, \f, and " ")
                               (1 or more times (matching the most
                               amount possible))
----------------------------------------------------------------------
     |                        OR
----------------------------------------------------------------------
      $                        before an optional \n, and the end of
                               a "line"
----------------------------------------------------------------------
    )                        end of grouping
----------------------------------------------------------------------
  )+                       end of \1 (NOTE: because you are using a
                           quantifier on this capture, only the LAST
                           repetition of the captured pattern will be
                           stored in \1)
----------------------------------------------------------------------

搜索并更换后

blank blank this is blank blank my blank channel for blank blank blank blank audio video transcription blank blank blank blank blank

替代地

如果您希望用一个空格替换多个空格的所有实例，那么我只是使用：

正则表达式：blank this is blank my blank channel for blank audio video transcription blank

替换为：没有