regexCount

swordfish.function.regexCount()

Search in str from the offset position, and return an integer indicating how many times a string that matches pattern occurs in str.

参数:

• str (Constant) -- A string or a string vector.

• pattern (Constant) -- An ordinary string scalar or a regular expression pattern to be searched in str. Regular expression pattern includes character literals, metacharacters, or a combination of both.

• offset (Constant, optional) -- A non-negative integer with default value of 0. This optional argument is the starting position in str to conduct the count operation. The first character in str corresponds to position 0.