English 中文(简体)
搬走所有宇宙号之后的空间
原标题:Removing spaces after all commas
  • 时间:2012-05-16 08:36:40
  •  标签:
  • regex
  • sed

我有一份CSV文件,每 com有一间空间。 我愿在每一 com子之后搬走这个空间,我尝试的是:

sed -e  s/ ,/,/g  local.csv > localNoSpaces.csv

但是,这只排除了每一行的第一 com之后的空间。 我怎么会把空间移走下去?

感谢。

最佳回答

如果空间不是空地,而是可以使用的表格和空间。

 sed -e  s/s+,/,/g  local.csv > localNoSpaces.csv

或每 com使用后使用

 sed -e  s/,s+/,/g  local.csv > localNoSpaces.csv
问题回答

您的格鲁斯将空间移至 com之前,而不是之后:

sed -e  s/, /,/g  local.csv > localNoSpaces.csv

如果有不止一个空间,则使用+之四:

sed -e  s/, +/,/g  local.csv > localNoSpaces.csv




相关问题
Uncommon regular expressions [closed]

Recently I discovered two amazing regular expression features: ?: and ?!. I was curious of other neat regex features. So maybe you would like to share some tricky regular expressions.

regex to trap img tag, both versions

I need to remove image tags from text, so both versions of the tag: <img src="" ... ></img> <img src="" ... />

C++, Boost regex, replace value function of matched value?

Specifically, I have an array of strings called val, and want to replace all instances of "%{n}%" in the input with val[n]. More generally, I want the replace value to be a function of the match ...

PowerShell -match operator and multiple groups

I have the following log entry that I am processing in PowerShell I m trying to extract all the activity names and durations using the -match operator but I am only getting one match group back. I m ...

Is it possible to negate a regular expression search?

I m building a lexical analysis engine in c#. For the most part it is done and works quite well. One of the features of my lexer is that it allows any user to input their own regular expressions. This ...

regex for four-digit numbers (or "default")

I need a regex for four-digit numbers separated by comma ("default" can also be a value). Examples: 6755 3452,8767,9865,8766,3454 7678,9876 1234,9867,6876,9865 default Note: "default" ...

热门标签