MFILTER
maps
The MFILTER function filters the element of a MAP according to the result of a macro execution on each key/value pair of the MAP. It produces a MAP containing only the elements for which the macro returned true.
The macro is called with a stack containing the MAP index on top and the key/value pair at that particular index below it. You can override this behaviour with a boolean.
See also
Signatures
Examples
{
'klingon' 10
'vulcan' 127
'romulan' 78
'ferengi' 2
'borg' 0
}
<%
[ 'k' 'v' ] STORE
$k -1 GET 'n' == // Last letter in a 'n'
$v 2 % 0 == // Even number
AND
%>
false MFILTER
Examples
A = {
'klingon': 10,
'vulcan': 127,
'romulan': 78,
'ferengi': 2,
'borg': 0
}
M = (k,v) -> {
i = GET(k, -1) == 'n' // Last letter in a 'n'
j = v % 2 == 0 // Even number
return AND(i, j)
}
return MFILTER(A, M, false)