pydata/numexpr — pull request #134 by mrkafk (2014-02-18 14:30:36+00:00)
Title: function contains for string columns, this version does not use malloc or free

- based on Gnulib's strstr.c and str-two-way.h which appear to implement algorithm with linear complexity for substring search and do not use malloc or free

- added 8 tests (typical, complex test and 2 corner cases testing)