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Returns tokens that contain the specified string.


Note that if you specify zero for N, it returns the total number of matching tokens.


echo -ag $matchtok(This is a test, is, 0, 32)

This example returns 2, as the string This is a test contains is two times (This and is).

echo -ag $matchtok(This is a test, is, 1, 32)

This example returns This as it's the first string containing is.