mirror of
https://https.git.savannah.gnu.org/git/bash.git
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103 lines
2.2 KiB
Plaintext
103 lines
2.2 KiB
Plaintext
# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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foo='1 2'
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bar='3 4 5'
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xtra='20 40 80'
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declare -A v1=( $foo 3 ) # unquoted expansions are now split
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declare -p v1
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declare -A v2=( [$foo]=3 ) # but subscripts are not
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declare -p v2
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declare -A v3
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v3=( $foo 3 ) # declaration commands and assignments are identical
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declare -p v3
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unset v1 v2 v3
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declare -A v1=( $foo $bar ) # unquoted expansions are split
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declare -p v1
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declare -A v2=( [$foo]=$bar )
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declare -p v2
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declare -A v3
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v3=( $foo $bar )
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declare -p v3
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unset v1 v2 v3
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declare -A v1=( "$foo" $bar )
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declare -p v1
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declare -A v2=( ["$foo"]=$bar )
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declare -p v2
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declare -A v3
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v3=( "$foo" $bar )
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declare -p v3
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unset v1 v2 v3
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declare -A v1=( "$foo" "$bar" )
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declare -p v1
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declare -A v2=( ["$foo"]="$bar" )
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declare -p v2
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declare -A v3
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v3=( "$foo" "$bar" )
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declare -p v3
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v1+=( $xtra xtra )
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v2+=( "$xtra" xtra )
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v3+=( '$xtra' xtra )
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declare -p v1 v2 v3
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v1+=( [$xtra]='new xtra' )
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v2+=( ["$xtra"]='new xtra' )
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v3+=( ['$xtra']='new xtra' )
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declare -p v1 v2 v3
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unset v1 v2 v3
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# we can now copy arrays from an array of key-value pairs or by generating
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# a list of key-value pairs
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declare -a kv=(zero 0 one 1 two 2 three 3 four 4)
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# assign associative array from an array of key-value pairs
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declare -A assoc
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assoc=( "${kv[@]}" )
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declare -p assoc
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unset assoc
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# do the same thing using a declaration command
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declare -A assoc=( "${kv[@]}" )
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declare -p assoc
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# copy an associative array using key-value pairs
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declare -A copy
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copy=( "${assoc[@]@k}" )
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declare -p copy
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unset copy
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# do the same thing using a declaration command
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declare -A copy=( "${assoc[@]@k}" )
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declare -p copy
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