Template:Ifdef/doc
From ErfWiki
[edit] Usage
{{ifdef|value|result}}
yields result if value isn't blank.
This template is used to simplify the following equivalent but somewhat cryptic code variants:
{{{1{{{1|}}}|{{{2}}}}}}{{{value{{{value|}}}|{{{result}}}}}}{{{test{{{test|}}}|{{{then}}}}}}
[edit] Example
| Code | Result |
1 {{ifdef| |empty}}
| 1 |
2 {{ifdef|x|gotcha}}
| 2 gotcha |
3 {{ifdef| {{{1| }}} | {{{1| }}} undefined}}
| 3 |
4 {{ifdef| {{{1|x}}} | {{{1|x}}} for an u}}
| 4 x for an u |
5 {{ifdef| {{{ 1 }}} | {{{1}}} bad idea}}
| 5 {{{1}}} bad idea |
For more info see: meta.wikimedia.org Ifdef
