In this example, we will try another method to declare an array. In this method, we will be using the “declare” keyword along with the flag to reserve memory space. For creating an array, we will simply run the below-displayed command: linux@linux-VirtualBox:~$declare–aarray_a=() ...
declare -a array (其实不用声明,按数组方式直接赋值给变量即可,BASH就知道那是数组) 数组赋值: (1)array=(var1 var2 var3 ... varN) (2)array=([0]=var1 [1]=var2 [2]=var3 ... [n]=varN) (3)array[0]=var1 arrya[1]=var2 ... array[n]=varN 计算数组元素个数: ${#array[@]}...
declare -a ARRAY_NAME(普通数组可以不加声明) declare -A ARRAY_NAME:关联数组(关联数组必须先声明再使用) 数组赋值 数组元素的赋值: (1)一次只赋值一个元素 declare -a menu menu[0]=hsr menu[1]=bjky menu[2]=mckr echo ${menu[*]} (2)一次赋值全部元素 number=(1 3 5 6 8 9) unmber2=({...
你可以这样使用它：## declare an array variabledeclare&...
$ declare -A array $forsubscriptina b c d e>do> array[$subscript]="$subscrupt $RANDOM">done$ printf":%s:\n""${array["c"]}"## 打印单个元素 :25475: $ printf":%s:\n""${array[@]}"## 打印整个数组 :26862: :32278: :25475: ...
To check if a Bash array contains a value, use the echo command and pipe it to grep command to search the value from the defined array. Use the grep Command 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 #!/bin/bash #declare an array my_array=("apple" "banana" "cherr...
$ bash array.sh Let’s use the “declare” method with the “-a” option to declare an array with values. So, we have updated the same code shown below. We have been using echo statements to display that the empty and string array will be going to display at the shell. We have be...
要使用关联数组之前,需要用declare -A array_name来进行显式声明array_name变量为关联数组。 查看help declare 对-A选项的说明如下: -A to make NAMEs associative arrays (if supported) 例如下面的语句定义了一个名为 filetypes 的关联数组,并为数组赋值: ...
# Declare an array named "colors" containing favorite colors colors=("Red", "Blue" "Green" "Purple" "Yellow") # Print the entire array echo "My favorite colors are: ${colors[@]}" Output: My favorite colors are: Red, Blue Green Purple Yellow ...
In bash, array is created automatically when a variable is used in the format like, name[index]=value name is any name for an array index could be any number or expression that must evaluate to a number greater than or equal to zero.You can declare an explicit array using declare -a ...