mirror of https://github.com/tLDP/LDP
35 lines
1.1 KiB
Bash
35 lines
1.1 KiB
Bash
#!/bin/bash
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# var-match.sh:
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# Demo of pattern replacement at prefix / suffix of string.
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v0=abc1234zip1234abc # Original variable.
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echo "v0 = $v0" # abc1234zip1234abc
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echo
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# Match at prefix (beginning) of string.
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v1=${v0/#abc/ABCDEF} # abc1234zip1234abc
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# |-|
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echo "v1 = $v1" # ABCDEF1234zip1234abc
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# |----|
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# Match at suffix (end) of string.
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v2=${v0/%abc/ABCDEF} # abc1234zip123abc
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# |-|
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echo "v2 = $v2" # abc1234zip1234ABCDEF
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# |----|
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echo
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# ----------------------------------------------------
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# Must match at beginning / end of string,
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#+ otherwise no replacement results.
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# ----------------------------------------------------
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v3=${v0/#123/000} # Matches, but not at beginning.
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echo "v3 = $v3" # abc1234zip1234abc
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# NO REPLACEMENT.
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v4=${v0/%123/000} # Matches, but not at end.
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echo "v4 = $v4" # abc1234zip1234abc
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# NO REPLACEMENT.
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exit 0
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