设置关联数组 值并发生重复赋值时,bash会覆盖该键。这 允许我们有效地删除数组重复。 CAVEAT:需要bash4+ 示例功能: remove_array_dups() { # Usage: remove_array_dups "array" declare -A tmp_array for i in "$@"; do [[ $i ]] && IFS=" " tmp_array["${i:- }"]=1 done printf '%s\n'...
function is_week_day { local -i day_of_week day_of_week=$(/usr/bin/date +%u)|| exit 100 # 1 = Monday .. 5 = Friday test "$day_of_week" -ge 1 -a "$day_of_week" -le 5 && return 0 || return 1 } function too_early { local -i hour hour=$(/usr/bin/date +%H)||...
设置关联数组 值并发生重复赋值时,bash会覆盖该键。这 允许我们有效地删除数组重复。 CAVEAT:需要bash4+ 示例功能: remove_array_dups() {# Usage: remove_array_dups "array"declare-A tmp_arrayforiin"$@";do[[$i]] && IFS=" "tmp_array["${i:- }"]=1doneprintf'%s\n'"${!tmp_array[@]}"}...
# Example (Exit early if program is not installed). if ! type -p convert &>/dev/null; then printf '%s\n' "error: convert is not installed, exiting..." exit 1 fi 使用获取当前日期 strftime Bash printf有一个内置的获取日期的方法,可用于代替date命令。 CAVEAT:需要bash4+ 示例功能: date()...
Bash basic exit status handling is flawed by decisions made early during bash design along with heavy POSIX constraints on the subject. The resultingset -emode isunsatisfactoryanderror-prone: whenever scripts are thought to fail fast, they could just behave in unintuitive ways, fallen into one of...
fi # Example (Exit early if program is not installed). if ! type -p convert &>/dev/null; then printf '%s\n' "error: convert is not installed, exiting..." exit 1 fiGet the current date using strftimeBash’s printf has a built-in method of getting the date which can be used in...
When to Use `set -e` vs. `|| exit` in Bash Scripts How to Handle Non-Critical Errors in Bash Scripts Best Practices for Writing Bash Scripts in CI/CD Pipelines Why Is Error Handling Important? Catching errors early prevents the pipeline from proceeding with failed builds or deployments. ...
and it is retrieved from this location when the binding scope ends. This technique was first used in early Lisp implementations to implement Local variable s, and it continues to be used in some current dialects like GNU Emacs Lisp. It is interesting to note that dynamic scope originated from...
If we drill down deeper, we finally get to this function, that checks the static trust cache: From there, we can see, using XREFs, that the values are set here: The function above parses the raw trust cache format. It is left as an exercise to the reader to follow the code and th...
ctrlc_count=0 function no_ctrlc() { let ctrlc_count++ echo if [[ $ctrlc_count == 1 ]]; then echo "Stop that." elif [[ $ctrlc_count == 2 ]]; then echo "Once more and I quit." else echo "That's it. I quit." exit fi } ...