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

14 lines
860 B
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{
"function": "coalesce",
"description": "Returns the first non-NULL value from the expression list.<br>This function can take any number of arguments.",
"variableLenArguments": true,
"arguments": [ {"arg":"expression1", "syntaxOnly": true},
{"arg":"expression2", "syntaxOnly": true},
{"arg":"expression", "descOnly": true, "description":"any valid expression or value, irregardless of type."}],
"examples": [ { "expression":"coalesce(NULL, 2)", "returns":"2"},
{ "expression":"coalesce(NULL, 2, 3)", "returns":"2"},
{ "expression":"coalesce(7, NULL, 3*2)", "returns":"7"},
{ "expression":"coalesce(\"fieldA\", \"fallbackField\", 'ERROR')", "returns":"value of fieldA if it is non-NULL else the value of \"fallbackField\" or the string 'ERROR' if both are NULL"} ]
}