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caselessPos
>>-caselessPos(needle-+---------------------------+-)---><
+-,--+-------+--+---------+-+
+-start-+ +-,length-+
Returns the position in the receiving buffer of a
[needle]
string. (See also
.) It returns
0 if
[needle]
is the null string or is not found
or if
[start]
is greater than
the length of the receiving buffer. The search is performed using caseless
comparisons.
By default, the search starts at the first
character of the receiving buffer (that is, the value of
[start]
is 1),
and continues to the end of the buffer. You can override this by specifying
[start
]
, the point at which the search starts, and
[length]
, the bounding limit for the search.
If specified,
[start]
must be a positive
whole number and
[length]
must be
a non-negative whole number.
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