Wikka : CalcInfo

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This action allows you to put calculations (with variables or not) and write out the result.

Basic usage

1 day ={{calc 24*60*60}} seconds

With variables usage

{{calc total=0}}
	- red:		  	  {{calc q=2;total+=q;q}}
	- blue:			  {{calc q=3;total+=q;q}}
	- yellow:		{{calc q=6;total+=q;q}}
	- **total**:		**{{calc total}}**
	- **total+taxes**:  **{{calc total+total*18.6/100.0}}**

• red: 2

• blue: 3

• yellow: 6

• total: 11

• total+taxes: 13.046

• Several expressions separated by a semicolon can appear in a calc action,

• only those that aren't assignations (not containing the equal sign) are displayed.

Features

• Secure

• The variables are keys in an associative array named calcvar (i.e. calcvar['total'])

• The function calls are forgotten.

• Powerful

• It makes your wiki page a spreadsheet.

• It allows displaying not hard-coded numerical values (such the number of seconds in a day), preventing errors...

• It allows modification of values in a page without recalculation by-hand of a global result (if you add an item green: 12 in the list)

Restrictions

• Variables names are necessary alphabetics (see line 14).

• You can't (because of security) call functions (see line 28).

• A few operators are allowed (see line 16).

Improvements

• You can easily add an operator (currently -*/+) by adding a char in the regexp line 16.

• You could authorize the call of specific functions (such ln, exp,...) by matching them (a little bit more difficult)

• You could define options in order to set the precision of the result by example.

Code

• [Source]
• [History]
• 2008-01-28 00:15:26
• Owner: JfDelesse
• Your hostname is 3.237.71.23