bash Idioms

Index

Symbols

• ! (exclamation point) in for loops, Similar to Python
• "" (quotation marks)
  • in arguments, Your First Argument
  • in for loops, Quotes and Spaces-Quotes and Spaces
  • style guidelines for, Quoting-Layout, Quoting
  • variable interpolation, Variable Reference
• # (hashtag) in variable references, Path or Prefix Removal
• #! (shebang), Shebang!-Shebang!
• $ (dollar sign)
  • in arithmetic, Arithmetic-Arithmetic
  • retrieving variable values, Variable Reference
• $# variable, checking numbers of arguments, Your First Argument
• $() notation, capturing function output, Function Return Values
  • (see also backticks; command substitution)
• $* variable, listing all arguments, Your First Argument
• $0 parameter, Function Parameters
• $1 parameter, Your First Argument
• $? function exit status, Function Return Values
• $IFS (internal field separator)
  • with local variables, Local Variables
  • reading files, Fiddling with $IFS for Fun and Profit, to Read Files-Fiddling with $IFS for Fun and Profit, to Read Files
• $RANDOM, $RANDOM-$RANDOM
• % (percent sign) in variable references, Shorthand for dirname or Suffix Removal
• && (AND)
  • as if statement, The Big “if”-The Big “if”
  • operator precedence, More than One Again-More than One Again
• ' ' (single quotation marks)
  • avoiding variable interpolation, Variable Reference
  • style guidelines for, Quoting-Layout, Quoting
• (()) (double parentheses)
  • in arithmetic, Arithmetic-Arithmetic
  • in loops, Looping Constructs
• () (parentheses)
  • in arithmetic, Arithmetic-Arithmetic
  • in case statement, Make Your Case
  • in function definition,