列表中的每个字符串称为元素(element)，一个列表最多可以存储2^32-1个元素。
declare -a ARRAY # Link filedescriptor 10 with stdin exec 10<&0 # stdin replaced with a file supplied as a first argument exec < $1 let count=0 while read LINE; do ARRAY[$count]=$LINE ((count++)) done echo Number of elements: ${#ARRAY[@]} # echo array's content echo ${ARRAY...
remove_array_dups() { # Usage: remove_array_dups "array" declare -A tmp_array for i in "$@"; do [[ $i ]] && IFS=" " tmp_array["${i:- }"]=1 done printf '%s\n' "${!tmp_array[@]}" } 用法示例: $ remove_array_dups 1 1 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 ...
declare -A tmp_array for i in "$@"; do [[ $i ]] && IFS=" " tmp_array["${i:- }"]=1 done printf '%s\n' "${!tmp_array[@]}" } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 用法示例: $ remove_array_dups 1 1 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 5 1 2 ...
elements separated by at least one white space for instance with: Or you could do the splitting of the elements into further whitespace-delimited words and count them in the shell itself. / (split on SPC/TAB/NL) / / ( splitting, SPC/TAB/NL by default) Using this with your array: ...
For example, let’s create a Bash script that has an array of 5 elements and print each element using thewhileloop. #!/bin/bash city=("Washington" "New_York" "Texas" "Chicago" "Austin") i=0 while [ $i -lt ${#city[@]} ] ...
To retrieve the array you need to useparameter expansion, which involves the dollar sign and curly brackets (${ }). The positions of the elements in the array are numbered starting from zero. To get the first element of this array use${plagues[0]}like so: ...
The collection-controlled loop iterates over all the elements of an array, or all the items of a list. This loop generally uses a foreach loop or a for in loop construct and may not be available in all programming languages. What are the different Bash loop constructs?
In the array slicing method, there are two command-centric syntaxes: echo ${array_name[@ or *]: Start} and ${array_name[@ or *]:Start:Count}. The 1st command ${array_name[@ or *]:Start} starts printing elements from the Start index up to the end. For instance, if the value ...
How to get a Bash Array size? (Array length) Another useful aspect of manipulating Bash Arrays is to be able to get the total count of all the elements in an array. You can get the length (i.e. size) of an Array variable with the # (hashtag) notation. ...