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Merge pull request #548 from justincampbell/bash-substr

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Add bash variable substring example
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Nami-Doc 2014-02-28 18:07:45 +01:00
commit cd7a06f98f
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@ -46,6 +46,10 @@ echo '$VARIABLE'
echo ${VARIABLE/Some/A} echo ${VARIABLE/Some/A}
# This will substitute the first occurance of "Some" with "A" # This will substitute the first occurance of "Some" with "A"
# Substring from a variable
echo ${VARIABLE:0:7}
# This will return only the first 7 characters of the value
# Default value for variable # Default value for variable
echo ${FOO:-"DefaultValueIfFOOIsMissingOrEmpty"} echo ${FOO:-"DefaultValueIfFOOIsMissingOrEmpty"}
# This works for null (FOO=), empty string (FOO=""), zero (FOO=0) returns 0 # This works for null (FOO=), empty string (FOO=""), zero (FOO=0) returns 0