my_array=("element 1""element 2""element 3") 数组在声明时可以不连续索引,特别是在关联数组(字典)中使用键值对形式存储数据。 访问数组元素 数组元素的访问通过索引来实现,索引从0开始。使用${array[index]}的格式访问指定索引的元素,例如: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 bash echo $...
问如何删除bash中数组的最后一个元素？EN版权声明：本文内容由互联网用户自发贡献，该文观点仅代表作者...
现在,shell允许使用从数组的最后一个元素开始计数的负下标(a [-1] = 2,echo $ {a [-1]})来分配,引用和取消设置索引数组元素。 和Bash手册4.3,在数组上 引用不带下标的数组变量相当于使用下标0引用。如果用于引用索引数组的元素的下标的计算结果为小于零的数字,则将其解释为相对于大于最大索引该数组,所以负...
$ 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[@]}" ## print the entire array :a 13856: :b 6235: :c 1574: :d...
假设您已经有了一个array，您可以说：老实说，这有点粗略，因为它似乎是（ab），使用的是参数从1开始...
one more element than the array contains, resulting in an empty output on the last iteration. To avoid this, ensure that your loop condition isindex -lt ${#numbers[@]}(less than the length of the array), notindex -le ${#numbers[@]}(less than or equal to the length of the array)...
echo "The last element is: ${arr[-1]}" Output 1 2 3 The last element is: fourth The IFS variable is used with a space delimiter to split the string in the above example. And the read command is used with the -ra option to read the input string into an array called arr. Her...
Bash: array contains element function containsElement() { local n=$# # number of arguments local value=${!n} # last of arguments echo"${@:2}"echo"${@:0}"echo number of arguments $#for((i=0;i<=$#;i++)) { echo $i ${!i}if["${!i}"=="${value}"]; then...
In the above example, the array will be printed starting from Index position 2 and till the last element. If you specify the length along with the index, then it will use the following formula to slice the array. From index to index+length-1 (inclusive) # Formula ...
# 即 element 为 A B C D # 因此, 通常使用 ${my_array[@]} 的方式遍历数组 for element in "${my_array[@]}"; do echo $element done # 单独输出每个元素 # output: A # B # C # D for element in "${my_array[*]}"; do echo $element done # 单独输出每个元素 # output: A B ...