1.字符串的截取- (NSString *)substringFromIndex:(NSUInteger)from; 从指定位置from开始(包括指定位置的字符)到尾部 从指定位置from开始(包括指定位置的字符)到尾部 - (NSString *)substringToIndex:(NSUInt 字符串 指定位置 子串 转载 mb5ff981d806017 ...
Bash, together with theGNU Coreutilspackage and tools such assedandawk, provides several means for manipulating strings and variables. One common task is to remove specific characters from a variable. This can be useful when performing data processing or text formatting. ...
FTP options:--ftp-user=USER setftpuser to USER--ftp-password=PASS setftppassword to PASS--no-remove-listing don't remove'.listing'files--no-glob turn off FTPfilename globbing--no-passive-ftpdisable the"passive"transfer mode--preserve-permissions preserve remotefilepermissions--retr-symlinks whe...
# Usage: remove_array_dups "array" declare -A tmp_array for i in "$@"; do [[ $i ]] && IFS=" " tmp_array["${i:- }"]=1 done printf '%s\n' "${!tmp_array[@]}" } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 用法示例: $ remove_array_dups 1 1 2 2 3 3 3 3 3 4...
remove empty direcories 移除空目录 常用选项: -p:删除某目录后,如果其父目录为空,则一并删除之 -v:显示过程 [root@localhost b]#rmdir-pv /tmp/a/b/c/rmdir: removing directory, ‘/tmp/a/b/c/’rmdir: removing directory, ‘/tmp/a/b’rmdir: removing directory, ‘/tmp/a’rmdir: removing di...
我想使用bash将文件中的多行合并为一行。我尝试了How do I remove newlines from a text file?中提到的几乎所有选项,但没有成功,也没有删除新的行。该文件是REST API的JSON输出,并使用bash进行解析。 如何将下面的几行合并成一行?文件< 浏览45提问于2019-02-01得票数0 ...
shell.cd('lib');shell.ls('*.js').forEach(function(file){shell.sed('-i','BUILD_VERSION','v0.1.2',file);shell.sed('-i',/^.*REMOVE_THIS_LINE.*$/,'',file);shell.sed('-i',/.*REPLACE_LINE_WITH_MACRO.*\n/,shell.cat('macro.js'),file);});shell.cd('..');# 除非另有说...
Bash provides us with a mechanism to remove a substring from a given string using the parameter expansion. It always removes only one matched substring. Depending on usage, it can match the longest or shortest substring and match starting from the beginning or from the end. It’s important to...
alias [alias-name[=string]...] 如何列出 bash 别名 输入下面的alias 命令: alias 结果为: alias ..='cd ..' alias amazonbackup='s3backup' alias apt-get='sudo apt-get' ... alias命令默认会列出当前用户定义好的别名。 如何定义或者创建一个 bash shell 别名 ...
# Usage: remove_array_dups "array" declare -A tmp_array for i in "$@"; do [[ $i ]] && IFS=" " tmp_array["${i:- }"]=1 done printf '%s\n' "${!tmp_array[@]}" } 用法示例: $ remove_array_dups 1 1 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 5 ...