func:filter

filter(val, filterExpr)

Apply a filter expression to a collection of dicts. The collection value may be any of the following:

• Grid: returns new grid with filtered rows
• Dict[]: returns list of filtered dicts (nulls are filtered out)
• Col[]: returns list of columns filtered by their meta
• Stream: filters stream of Dicts - see Streams

The filter parameter may one fo the following:

• Axon expression which maps to a filter
• Filter from parseFilter()
• Filter from parseSearch()

Examples:

// apply to a list of dicts
[{v:1}, {v:2}, {v:3}, {v:4}].filter(v >= 3)

// apply to a grid and return new grid with matching rows
readAll(equip).filter(meter)

// apply to a list of columns
read(ahu).toPoints.hisRead(yesterday).cols.filter(kind=="Bool")

// apply to a stream of dicts
readAllStream(equip).filter(siteMeter and elec and meter).collect

// apply search filter
readAll(equip).filter(parseSearch("RTU-1"))

def	func:filter
is	func
lib	lib:axon
name	filter

feature	Feature namespace of definitions formatted as feature:name
func	Axon function