shell script array append
Yes there is: ARRAY=() ARRAY+=('foo') ARRAY+=('bar'). Bash Reference Manual: In the context where an assignment statement is assigning a value to a shell variable or array index (see Arrays), the '+=' operator can be used to append,I'd say that your approach works, but it is very slow1. You can use brace expansion instead: echo 135.15.0..255}.0..255}. Or, if you want the result in a variable, just assign: list=$(echo 135.15.0..255}.0..255}). If you want the addresses in an array, Tested, and it works: array=(a b c d e) cnt=$#array[@]} for ((i=0;i<cnt;i++)); do array[i]="$array[i]}$i" echo "$array[i]}" done. produces: a0 b1 c2 d3 e4. EDIT: declaration of the array could be shortened to array=(a..e}). To help,read -a array tot=0 for i in $array[@]}; do let tot+=$i done echo "Total: $tot". , The problem is with printing ie echo $fa . This is equivalent to echo $fa[0]} which means the first element of the array, so you got element1 echo "$fa[@]}". should give you the entire array. Reference. [ This ] should give you a nice descripti,Try this script: declare -a properties while read line do [[ "$line}" == *=* ]] && properties+=("$line") done < "$FILE}" for x in "$properties[@]}" do echo "the value is "$x" done. ,Second, to duplicate the entries, either expand the array to itself three times: countries=( "$countries[@]}" "$countries[@]}" "$countries[@]}" ) ...or use the modern syntax for performing an append: countries+=( "$count, You cannot refer variable updates made in the child process (pipe connected while block). Instead, feed data using input redirection like this: #!/bin/bash data_file="$1" down=() counter=0 while read line; do isEven=$(( $counter % 2 )) if [ $is, It will append "sbin" 3 times as it should, but it won't iterate over the newly added "sbin"s in the same loop. After the 2nd example: echo "$array[@]}" #=> etc bin var sbin sbin sbin ...
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 shell script array append 相關參考資料
Add a new element to an array without specifying the index in Bash ...
Yes there is: ARRAY=() ARRAY+=('foo') ARRAY+=('bar'). Bash Reference Manual: In the context where an assignment statement is assigning a value to a shell variable or array index (see A... https://stackoverflow.com bash - Append elements to array - loop - Stack Overflow
I'd say that your approach works, but it is very slow1. You can use brace expansion instead: echo 135.15.0..255}.0..255}. Or, if you want the result in a variable, just assign: list=$(echo 135.15.... https://stackoverflow.com How to append a string to each element of a Bash array? - Stack ...
Tested, and it works: array=(a b c d e) cnt=$#array[@]} for ((i=0;i<cnt;i++)); do array[i]="$array[i]}$i" echo "$array[i]}" done. produces: a0 b1 c2 d3 e4. EDIT: declaration of... https://stackoverflow.com bash - Unix Shell Script Adding the Elements of an Array Together ...
read -a array tot=0 for i in $array[@]}; do let tot+=$i done echo "Total: $tot". https://stackoverflow.com bash - Add element into Array - Stack Overflow
The problem is with printing ie echo $fa . This is equivalent to echo $fa[0]} which means the first element of the array, so you got element1 echo "$fa[@]}". should give you the entire arra... https://stackoverflow.com bash - shell adding string to an array - Stack Overflow
Try this script: declare -a properties while read line do [[ "$line}" == *=* ]] && properties+=("$line") done < "$FILE}" for x in "$properties[@]}" d... https://stackoverflow.com how to concatenate arrays in bash? - Stack Overflow
Second, to duplicate the entries, either expand the array to itself three times: countries=( "$countries[@]}" "$countries[@]}" "$countries[@]}" ) ...or use the modern syn... https://stackoverflow.com bash - How do I append an item to an array in a pipeline? - Unix ...
You cannot refer variable updates made in the child process (pipe connected while block). Instead, feed data using input redirection like this: #!/bin/bash data_file="$1" down=() counter=0 ... https://unix.stackexchange.com bash - In a loop over an array, add an element to the array - Unix ...
It will append "sbin" 3 times as it should, but it won't iterate over the newly added "sbin"s in the same loop. After the 2nd example: echo "$array[@]}" #=> etc b... https://unix.stackexchange.com |