问题描述
我正在尝试匹配模式(\ ^ | \〜?)(\ d | x | \ *)+ \.(\ d | x | \ *)+ \.(\ d |x | \ *)+ 和 sed ，但没有运气.我正在运行的文件是这样的:
I'm trying to match a pattern (\^|\~?)(\d|x|\*)+\.(\d|x|\*)+\.(\d|x|\*)+ with sed without luck.The file I'm running through is this:
{
"name": "something",
"version": "0.0.1",
"description": "some desc",
"main": "gulpfile.js",
"directories": {
"test": "tests"
},
"dependencies": {
"babel-polyfill": "^6.7.4",
"babel-preset-es2015": "^6.6.0",
"babel-preset-react": "^6.5.0",
"gulp-clean": "^0.3.2",
"jquery": "^2.1.4",
"lodash": "^4.0.0",
"moment": "^2.13.0",
"moment-timezone": "^0.5.0",
"radium": "^0.16.2",
"react": "^15.1.0",
"react-bootstrap-sweetalert": "^1.1.10",
"react-dom": "^15.1.0",
"react-timeago": "^2.2.1",
"sprintf": "^0.1.5",
"smoothscroll": "~0.2.2"
},
"devDependencies": {
"babel": "^6.3.26",
"babelify": "^7.2.0",
"browserify": "~12.0.1",
"console-stamp": "^0.2.0",
"estraverse-fb": "^1.3.1",
"gulp": "^3.9.0",
"gulp-concat": "^2.6.0",
"gulp-sass": "^2.1.1",
"gulp-sourcemaps": "^1.6.0",
"gulp-util": "^3.0.7",
"lodash": "4.5.1",
"lodash.assign": "^3.2.0",
"lodash.isfunction": "^3.0.8",
"lodash.reduce": "^4.3.0",
"node-sass": "3.4.2",
"react-bootstrap": "^0.29.4",
"react-intl": "2.1.0",
"reactify": "1.1.1",
"sweetalert": "^1.1.3",
"vinyl": "^1.1.0",
"vinyl-buffer": "^1.0.0",
"vinyl-source-stream": "^1.1.0",
"watchify": "^3.4.0",
"jsx-to-string": "~0.2.11"
},
"optionalDependencies": {
"pkg-save": "~1.0.2"
},
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"repository": {
"type": "git",
"url": "someurl"
},
"author": "authorname",
"license": "MIT"
}
正如您在regexr中看到的，它与所需的模式匹配(也与版本"匹配，但这是我稍后要解决的另一个问题): http://regexr.com/3e324
As you can see in regexr it matches the desired pattern (also matching "version" but that's another issue I'll tackle later):http://regexr.com/3e324
我正在使用以下命令调用sed: cat package.json |sed's/(\ ^ | \〜?)(\ d | x | \ *)+ \.(\ d | x | \ *)+ \.(\ d | x | \ *)+/Hello/g'-r
I'm invoking invoking sed with the following command:cat package.json | sed 's/(\^|\~?)(\d|x|\*)+\.(\d|x|\*)+\.(\d|x|\*)+/Hello/g' -r
为简洁起见，它输出类似(即未过滤的输入)的内容:
For the sake of brevity, it outputs something like (ie. unfiltered input):
...
"dependencies": {
"babel-polyfill": "^6.7.4",
"babel-preset-es2015": "^6.6.0",
"babel-preset-react": "^6.5.0",
"gulp-clean": "^0.3.2",
...
应将所有数字替换为"Hello".
我在做什么错?
与错误标志有关(我已经尝试过/gm )
还是没有使用正确的正则表达式引擎(我正在通过 -r 选项来利用扩展的正则表达式)?
It should replace all digits with "Hello".
What am I doing wrong?
Something to do with bad flags (I've tried /gm)
or not using the correct regex engine (I'm passing the -r option to utilize extended regex)?
推荐答案
虽然POSIX正则表达式支持某些命名字符类，例如 [[:digit:]] 和 [[:alnum:]] ，它们不支持速记类，例如 \ d 和 \ w .
While POSIX regular expression support some named character classes, like [[:digit:]] and [[:alnum:]], they do not support shorthand classes such as \d and \w.
一些GNU扩展带来了速记类支持，但仅限于其中的一些， \ w ， \ W ， \ s 和 \ S 并根据 regular-expressions.info .
Some GNU extensions bring shorthand classes support, but they are restricted to a few of them, \w, \W, \s and \S according to regular-expressions.info.
通过将正则表达式中的 \ d 替换为 [0-9] ，我得以转换您的文档.正则表达式变为(\ ^ | \〜?)([0-9] | x | \ *)+ \.([0-9] | x | \ *)+ \.([0-9] | x | \ *)+ ，或者更好的 [〜^]([0-9x *] + \.){2} [0-9x *] (感谢Ed Morton！).
By replacing the \d in your regular expression to [0-9] I was able to transform your document. The regular expression becomes (\^|\~?)([0-9]|x|\*)+\.([0-9]|x|\*)+\.([0-9]|x|\*)+, or better [~^]([0-9x*]+\.){2}[0-9x*] (thanks Ed Morton !).
请注意，您的命令可以重写为以下内容，而不使用 cat :
As a side note, your command could be rewritten to the following, which does not use cat :
sed -E 's/[~^]([0-9x*]+\.){2}[0-9x*]/Hello/' package.json
而且正如Matt所言，最好使用JSON解析器，例如 jq .
And as noted by Matt, you'd be better off using a JSON parser such as jq.
这篇关于无法将regex与sed匹配的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！