Tech Tip: Utility Method Filter Collection for Desired Type
PRODUCT: 4D | VERSION: 19 R6 | PLATFORM: Mac & Win
Published On: December 5, 2022
Utility method Collection_type($1; $2) accepts two parameters:
$1 - Collection
$2 - Integer that represents desired type
A collection is returned based on the desired type parameter and stored in the result local variables displayed below
Collection_type($1;$2)
#DECLARE($col : Collection; $type : Integer)->$result : Collection If (Count parameters=2) $f:=Formula(OB Get type($1; "value")=$2) $result:=$col.filter($f; $type) End If |
Example:
$c:=New collection(1;2;3;4;5) $test_col:=New collection(9;8;7;6;5) $c.push(New object("name"; “name1”; “number”; 12345)) $c.push(New object("name"; “name2”; “number”; 67890)) $c.push("text") $c.push($test_col) $c.push(False) |
$result1:=Collection_type($c;Is object) //[{name:name1,number:12345},{name:name2,number:67890}] $result2:=Collection_type($c; Is real) // [1,2,3,4,5] $result3:=Collection_type($c; Is boolean) // [false] $result4:=Collection_type($c; Is collection) // [[9,8,7,6,5]] $result5:=Collection_type($c; Is text) // ["text"] |