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...
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" "${array[@]}" ## print the entire array :a 13856: :b 6235: :c 1574: :d...
Bash: array contains element function containsElement() { local n=$# # 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...
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...
# 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 ...
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)...
In this example, ${Unix[@]:0:$pos} will give you 3 elements starting from 0th index i.e 0,1,2 and ${Unix[@]:4} will give the elements from 4th index to the last index. And merge both the above output. This is one of the workaround to remove an element from an array. ...
subscript used to reference an element of an indexed array evaluates to a number less than zero, it is interpreted as relative to one greater than the maximum index of the array, so negative indices count back from the end of the array, and an index of -1 refers to the last element. ...