The subrange of haystack whose first element is the first occurrence of needle. If needle couldn't be found, an empty inout void[] is returned.
t { const ubyte[9] haystack = ['a', 'b', 'c', 'd', 'e', 'f', 'b', 'g', 'h']; assert(equal(find(haystack, 'a'), haystack[])); assert(equal(find(haystack, 'b'), haystack[1 .. $])); assert(equal(find(haystack, 'c'), haystack[2 .. $])); assert(equal(find(haystack, 'd'), haystack[3 .. $])); assert(equal(find(haystack, 'e'), haystack[4 .. $])); assert(equal(find(haystack, 'f'), haystack[5 .. $])); assert(equal(find(haystack, 'h'), haystack[8 .. $])); assert(find(haystack, 'i').length == 0); assert(find(null, 'a').length == 0
Finds the first occurrence of needle in haystack if any.