# get number of elements in the array ELEMENTS=${#ARRAY[@]} # echo each element in array # for loop for (( i=0;i<$ELEMENTS;i++)); do echo ${ARRAY[${i}]} done 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 8.2. Read file int
在Bash中,可以使用readarray命令或者使用while循环读取文本文件的每一行并将其存储在数组中。 方法一:使用readarray命令 readarray命令可以从标准输入或者文件中读取数据,并将每一行存储在数组中。 代码语言:txt 复制 readarray -t array < file.txt 其中,-t选项用于去除每行结尾的换行符。
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caller [expr] pwd [-LP] case WORD in [PATTERN [| PATTERN]...)> read [-ers] [-a array] [-d delim] [-> cd [-L|-P] [dir] readarray [-n count] [-O origin] [-s> command [-pVv] command [arg ...] readonly [-af] [name[=value] ...] or> compgen [-abcdefgjksuv] [...
[root@localhost ~]# read -p"input contents" -t10 input contents#-t默认30秒 4.declare / typeset *declare/typeset [dmtsai@study ~]# declare [-aixr] variable 选项与参数: -a :将后面名为 variable 的变量定义成为阵列 (array) 类型
对于数组来说, ${#array[*]} 和 ${#array[@]} 表示数组中元素的个数。 匹配字符串开头的子串长度 语法: expr match "$string" '$substring' # $substring 是一个正则表达式. expr "$string" : '$substring' # $substring是一个正则表达式.
read命令是用于从终端或者文件中读取输入的内建命令,read命令读取整行输入,每行末尾的换行符不被读入。在read命令后面,如果没有指定变量名,读取的数据将被自动赋值给特定的变量REPLY。下面的列表给出了read命令的常用方式: 见下面的示例(绿色高亮部分的文本为控制台手工输入信息): ...
jpg picture is equal to img451.jpg Array: Current stooge: curly Current stooge: larry Current stooge: moe Command substitution: bigmath.sh is a bash script condexif.sh is a bash script forloop.sh is a bash script letsread.sh is a bash script manyloops.sh is a bash script math.sh ...
README MIT licensepure bash bibleA collection of pure bash alternatives to external processes.The goal of this book is to document commonly-known and lesser-known methods of doing various tasks using only built-in bash features. Using the snippets from this bible can help remove unneeded dependen...
" fi # 也可以在数组中运行 if [[ ${arr[*]} == *sub_string* ]]; then printf '%s\n' "sub_string is in array." fi使用case语句:case "$var" in *sub_string*) # Do stuff ;; *sub_string2*) # Do more stuff ;; *) # Else ;; esac...