The asterisk finds zero or more characters, so searching for 90* will match 9, 90, 900, and so on. When you start crafting regular expressions, you may experience unexpected results.

Figure 1. Now what if you'd like to know what the string that was matched? To do this, we'll use regex groups. Whenever a match is found and a regex group is used; (), the [regex] type accelerator has ...

I was involved in a recent discussion on the "best" way to remove a given parameter from a URL string. The conversation began with using string primitives to split and join the parameter, a method ...

After the 20,000th space, there is a different character, but the Regex engine expected a space or the end of the string. Realizing it cannot match like this it backtracks, and tries matching \s+$ ...

That's different from ls read*.txt, which will match both readme.txt and read.txt, because the asterisk means "zero or more characters" in the file glob. Here's the easy way to remember if you're ...

Rubular Link Granted, that single line RegEx looks like a random garble of characters at first glance. In reality, it is a carefully constructed set of rules to dictate a pattern match on a string.