_repeat() { #@ USAGE: _repeat string number _REPEAT=$1 while (( ${#_REPEAT} < $2 )) ## Loop until string exceeds desired length do _REPEAT=$_REPEAT$_REPEAT$_REPEAT ## 3 seems to be the optimum number done _REPEAT=${_REPEAT:0:$2} ## Trim to desired length } repeat() { ...
After deletion of shortest match from front: string.txt After deletion of shortest match from back: bash.string In the first echo statement substring ‘*.’ matches the characters and a dot, and # strips from the front of the string, so it strips the substring “bash.” from the variable...
@查尔斯达菲,你说得对。似乎我不理解tldp.orgstringZ=abcABC123ABCabc; echo ${stringZ:-4} Defaults to full string, as in ${parameter:-default}上的例子。bash语法很误导人,${3: -1}和${3:-1}之间只有一个空格,我得到了两个不同的东西… @Piotrekkr,我强烈推荐使用bash hacker参考(wiki.bash hack...
\nnn the eight-bit character whose value is the octal value nnn (one to three digits) \xHH the eight-bit character whose value is the hexadecimal value HH (one or two hex digits) \uHHHH the Unicode (ISO/IEC 10646) character whose value is the hexadecimal value HHHH (one to four hex ...
OPTIONS In addition to the single-character shell options documented in the description of the set builtin command, bash inter- prets the following options when it is invoked: -c string If the -c option is present, then commands are read from string. If there are arguments after the string...
" $ trim_all "$name" John Black is my name.Use regex on a stringThe result of bash's regex matching can be used to replace sed for a large number of use-cases.CAVEAT: This is one of the few platform dependent bash features. bash will use whatever regex engine is installed on the...
All the single-character shell options documented in the description of the set builtin command can be used as options when invoking bash.The following options are also available:-c string If the -c option is present, then commands are read from string. If there are arguments after the ...
You can also use the hash to trim a string variable and remove some text from the beginning. This command creates a string variable calledthis_string. ✕Remove Ads In this example, we assign the text "Dave Geek!" to the variable. ...
test suite: If colon trim doesn't do anything, trim as usual (f4ffafe) test suite: Ignore env var pulled in by use of scp in tests (7f1f33b) test suite: Fix ifdown and ifup CI test skipping (089288d) test suite: Skip an expected make test case failure in centos6 CI (4d5785f...
The Prompt Variables: PROMPT_COMMAND, PROMPT_DIRTRIMThe Prompt String Variables: PS0, PS1, PS2, PS3, and PS4 $PS0 $PS1 $PS2 $PS3 $PS4 The shell prompt is where you type commands on your terminal in an interactive shell session. The prompt can be customized to display useful informati...