Yes, good point... We're not really simulating sprintf(), but just the part where we take a number and add a decimal place at one part of a number and format it to our liking...

I think a lot of people didn't notice that the Perl code was just a snippet of what was in the actual function, and that I didn't provide the entire thing... if we examine the JavaScript version, we will notice that it handles the special cases: 

  strValue += "";      // Convert any digits to string
  if (! strValue) { strValue = "0"; }  // Convert empty string to 0

  // Set any non-numeric values to 0
  if (! strValue.match (/^\d+\.?$|\d+\.?\d*$|\d*\.?\d+$/)) { strValue 
+= "0"; }

  // Add a leading 0 to any numbers starting with a decimal point
  if (strValue.match (/^\./)) { strValue = "0" + strValue; }

[download]

So what we really have (without actually provided the entire function :) is: 

value|precision     sprintf   Incognito   Albannach       jeffa      r
+ob_au
 '123.45678'|3:     123.457     123.456     123.456         123     12
+3.457
      '12.4'|1:        12.4        12.4        12.4          12       
+ 12.4
          ''|0:           0           0                               
+    0
      '3.14'|5:     3.14000     3.14000     3.14000    00003.14     3.
+14000
         '1'|5:     1.00000     1.00000     1.00000       00001     1.
+00000
        '.5'|0:           0           0                               
+    1
        '10'|5:    10.00000    10.00000    10.00000       00010    10.
+00000
  '12.45435'|0:          12          12          12          12       
+   12
       '100'|5:   100.00000   100.00000   100.00000       00100   100.
+00000
        '3.'|0:           3           3           3           3       
+    3
      '1000'|5:  1000.00000  1000.00000  1000.00000       01000  1000.
+00000
     '12.56'|0:          13          12          12          12       
+   13

[download]

In reply to Re: Re: Using Regular Expressions to Simulate sprintf() function - One Liner Challenge by Incognito
in thread Using Regular Expressions to Simulate sprintf() function - One Liner Challenge by Incognito

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