Language idioms

Language idiom is special combinations of verbs, which has better performance and memory optimizations.Idioms are recognized and optimized in lambda bodies only at parse time.

Syntax: ![symvec]

whеre symvec is a constant symbol vector defining type. Idiom is calculated at parse time and replaced with actual type id as long integer. It'srecommended to use as the fastest way of checking type for strict equality.

o) { (!`s`long)=@x }1
1b

Quite often it's necessary to find index of some vаlue in list starting with some position from the left.

Syntax: pos+(pos _ vec)?val

whеre pos is a position to start search from, vec - vector to look in, val - vаlue to look for.

o) {[vec;pos;val] pos+(pos _ vec)?val }[2 1 2 3; 1; 2]
2

Similar to "find from" idiom, this idiom searches until some position in vector.

Syntax: (pos#vec)?val

whеre pos is a position to stop search, vec - vector to look in, val - vаlue to look for.

o) {[vec;pos;val] (pos#vec)?val }[1 2 2 3; 2; 3]
0N

Optimized search of indices in gindexed vector. Implementation uses optimized index search if vec vector is long enough.

Syntax: &vec=val or &val=vec

whеre vec - vector to look in, val - vаlue to look for.