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Manipulation of strings 1. Remove the leading and trailing spaces and special characters of a string function trim () to remove characters from the start position and end position Syntax string trim (String str[, String charlist]), where charlist is

Source: https://www.cnblogs.com/moqing/p/5665126.htmlExample (frequently asked in an interview question): The maximum number of characters to find duplicatesSplit (): A method in a string that transfers a string to an array.Sort (): The sorting

Regular expression, there are wood people like me, learned several times but still very ignorant circle, learning when the old understand, learned to forget the light. Well, in fact, or practice is not enough, so-called temperature so that the new,

Xargs usage Explanation1. IntroductionThe key to using this command is that many commands do not support | Pipelines to pass parameters, and in daily work there is a need for the Xargs command, for example:Find/sbin-perm +700 |ls-l This command is

Xargs and find are often used in combination to perform file operations. When you delete logs, you just get used to deleting them, such as # find. -typef-name *. log | xargsrm-rf * deletes the file ending with log. If I want to move or copy the file,

IntroductionUsage scenarios:I am in the development environment, using the SVN version management tool, and compared to git, if you sometimes change more files, but not all need to commit (or need to follow a case a commit to commit), then how to