4.0 版的bash中引入的关联数组使用字符串作为下标,并且必须在使用前声明: $ declare -A array $ for subscript in a b c d e > do > array[$subscript]="$subscript $RANDOM" > done $ printf ":%s:\n" "${array["c"]}" ## print one element :c 1574: $ printf ":%s:\n" "${array[@]...
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You can also change an individual elements in the array by specifying their index with square brackets:
In this example, we have two arrays:fruitsandcolors. We use a ‘for’ loop to iterate through the indices of thefruitsarray (obtained using the!symbol before the array variable). For each iteration, we print out a sentence that combines elements from both arrays at the same index. Loops ...
numbers_array[i]=”${numbers_array[j]}”– updates the element at indexito the element at indexj numbers_array[j]=”$temp”– updates the element at indexjto the original element at indexithat’s stored in thetempvariable Now, let’s see the output of the Bash scriptexample.sh: ...
To remove an element from the array, you can use theunsetcommand. Take a look at the below example where using theunsetcommand the element from theindex(2)is removed. $ echo ${locations[@]} $ unset locations[2] $ echo ${locations[@]} ...
${#arrayname[n]} should give the length of the nth element in an array. $cat arraymanip.sh #! /bin/bash Unix[0]='Debian' Unix[1]='Red hat' Unix[2]='Ubuntu' Unix[3]='Suse' echo ${#Unix[3]} # length of the element located at index 3 i.e Suse ...
新版本和取得方法 最新版本可以在 http://tille.xalasys.com/training/bash 找到,你也可以在找到相同的版本 http://tldp.org/LDP/Bash−Beginners−Guide/html/index.html Fultus.com 已经有印刷版本. 7/91 图 1.封面 Bash 新手指南 4. 历史修订 Revision 1.7 2005−09−05 Revised by: MG Corrected...
[] 数组元素 Array[1]=slot_1 echo ${Array[1]}[] 字符范围 在正则表达式中使用,作为字符匹配的一个范围(()) 数学计算的扩展 在(())结构中可以使用一些数字计算. 具体参阅((...))结构.>&>>&>>< 重定向. scriptname >filename 重定向脚本的输出到文件中.覆盖文件原有内容....
array_name[1]=value1 array_name[2]=value2 可以不使用连续的下标,而且下标的范围没有限制。 回到顶部 12.2 读取数组 读取数组元素值的一般格式是: ${array_name[index]} 例如: valuen=${array_name[2]} 举个例子: #!/bin/sh NAME[0]="Zara" ...