![Bash variable default value](/plugins/HC_Emoticons/emoticons/tuski/07.gif)
2010年1月6日—YoucanusesomethingcalledBashparameterexpansiontoaccomplishthis.Togettheassignedvalue,ordefaultifit'smissing:FOO=$VARIABLE ...,2010年12月14日—bashassigndefaultvalue...$parameter:=word}AssignDefaultValues.Ifparameterisunsetornull,theex...
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ThisbriefguideshowcasedhowtoassignadefaultvalueifaBashvariablewasnotsetorassignednovalue.Thistechniquecanbeusefulinvarioussituations ...
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