gawk: Common Extensions

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1 A.7 Common Extensions Summary
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1 The following table summarizes the common extensions supported by
1 'gawk', Brian Kernighan's 'awk', and 'mawk', the three most widely used
1 freely available versions of 'awk' (⇒Other Versions).
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1 Feature                      BWK 'awk'   'mawk'   'gawk'   Now standard
1 --------------------------------------------------------------------------
1 '\x' escape sequence         X           X        X
1 'FS' as null string          X           X        X
1 '/dev/stdin' special file    X           X        X
1 '/dev/stdout' special file   X           X        X
1 '/dev/stderr' special file   X           X        X
1 'delete' without subscript   X           X        X        X
1 'fflush()' function          X           X        X        X
1 'length()' of an array       X           X        X
1 'nextfile' statement         X           X        X        X
1 '**' and '**=' operators     X                    X
1 'func' keyword               X                    X
1 'BINMODE' variable                       X        X
1 'RS' as regexp                           X        X
1 Time-related functions                   X        X
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