統(tǒng)計(jì)代碼行數(shù)

find . -name "*.m" -or -name "*.h" | xargs grep -v "^$"| wc -l

獲取腳本所在的路徑

cwd=$(cd $(dirname ${0}); pwd)

跨行字符串

a="aa
b c
def"

echo $a #錯(cuò)誤
echo "$a" #正確

正則表達(dá)式

# 存在連續(xù)的non-space字符
if [[ $line =~ [^\[:space:\]]+ ]]; then echo ${BASH_REMATCH[@]}; fi

# 存在連續(xù)的space字符
if [[ $line =~ [[:space:]]+ ]]; then echo ${BASH_REMATCH[@]}; fi