I  have two large arrays of strings array1 with 180000 names and array2 with 24000 names ,I want to find the common names in both of them.

My arrays are  for example

Array1                                         Array2

GAP4                                         
 HIST1B-histamine....

MFG12                                       SNRPD-signal induced...

CFH1A                                       RNF-ribose nucleic...

My
array 2 ,has description of the abbreviation ,how can I remove the
description part before using intersect command to match common names
in array1 and array2.
the description and abbreviation are separated by a hyphen --.

I tried using matlab ,but due to the large file size it didnot work.
Can you suggest me something to overcome this problem.

Thank You
rk




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