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Name

unique_array() - partitions an array of objects into groups

Synopsis

mixed *unique_array( object *obarr, string separator );
mixed *unique_array( object *obarr, string separator, mixed skip );
mixed *unique_array( mixed *arr, function f );
mixed *unique_array( mixed *arr, function f, mixed skip );

Description

Groups objects/values together for which the `separator' function returns the same value. In the first case, `separator' is a string function name to try on each object. In the second case, the function f is called with the element as the argument. If `skip' is passed, elements for which the separator function returns the same as `skip' are omitted from the return value.

Return value

The return value is an array of arrays of the form:

     ({
         ({Same1:1, Same1:2, Same1:3, .... Same1:N }),
         ({Same2:1, Same2:2, Same2:3, .... Same2:N }),
         ({Same3:1, Same3:2, Same3:3, .... Same3:N }),
                       ....
                       ....
         ({SameM:1, SameM:2, SameM:3, .... SameM:N }),
     })

i.e. an array of arrays, where each of the elements in the sub arrays returned the same value as the other elements in the same sub array.