By regex comma is a simple and powerful tool to help you find and replace the comma in text strings.
It’s not that simple though. First, we need to learn the basics by using some of the pre-built regex options, such as the search function and the pattern function.
We can also use regular expressions to look ahead and back-track through a string. To put it another way, we can use regular expressions to repeat a pattern over and over when we need to. I am talking about using regular expressions to repeat a pattern to the right and to the left.
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