Nyall Dawson 709c14391b Change expression help from free form html files to structured json
A new script then parses these json help files into the html help
contents, in a standardised manner. Previously, the function help
was a bunch of different formats and structures.

Now, a custom stylesheet can be applied (and later tweaked!) to
format these help. Eg, this commit colors variables and function
names in the syntax section for greater readability.
2015-09-02 14:22:50 +10:00

18 lines
423 B
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<h3>IS expression</h3>
Returns 1 if a is the same as b.
<h4>Syntax</h4>
<pre>a IS b</pre>
<h4>Arguments</h4>
None
<h4>Example</h4>
<pre> 'A' IS 'A' &rarr; returns 1 </pre>
<pre> 'A' IS 'a' &rarr; returns 0 </pre>
<pre> 4 IS 4 &rarr; returns 1 </pre>
<pre> 4 IS 2+2 &rarr; returns 1 </pre>
<pre> 4 IS 2 &rarr; returns 0 </pre>
<pre> $geometry IS NULL &rarr; returns 0, if your geometry is not NULL</pre>