diff options
Diffstat (limited to 'awk.html.markdown')
| -rw-r--r-- | awk.html.markdown | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/awk.html.markdown b/awk.html.markdown index 3ff3f937..34013251 100644 --- a/awk.html.markdown +++ b/awk.html.markdown @@ -48,7 +48,7 @@ BEGIN { # the preliminary set-up code, before you process any text files. If you # have no text files, then think of BEGIN as the main entry point. - # Variables are global. Just set them or use them, no need to declare.. + # Variables are global. Just set them or use them, no need to declare. count = 0; # Operators just like in C and friends @@ -178,26 +178,26 @@ function arithmetic_functions(a, b, c, d) { # Now, to demonstrate the arithmetic functions # Most AWK implementations have some standard trig functions - localvar = sin(a); - localvar = cos(a); - localvar = atan2(b, a); # arc tangent of b / a + d = sin(a); + d = cos(a); + d = atan2(b, a); # arc tangent of b / a # And logarithmic stuff - localvar = exp(a); - localvar = log(a); + d = exp(a); + d = log(a); # Square root - localvar = sqrt(a); + d = sqrt(a); # Truncate floating point to integer - localvar = int(5.34); # localvar => 5 + d = int(5.34); # d => 5 # Random numbers srand(); # Supply a seed as an argument. By default, it uses the time of day - localvar = rand(); # Random number between 0 and 1. + d = rand(); # Random number between 0 and 1. # Here's how to return a value - return localvar; + return d; } function string_functions( localvar, arr) { @@ -209,7 +209,7 @@ function string_functions( localvar, arr) { # Both return number of matches replaced localvar = "fooooobar"; sub("fo+", "Meet me at the ", localvar); # localvar => "Meet me at the bar" - gsub("e+", ".", localvar); # localvar => "m..t m. at th. bar" + gsub("e", ".", localvar); # localvar => "m..t m. at th. bar" # Search for a string that matches a regular expression # index() does the same thing, but doesn't allow a regular expression |