What is the difference between regex and wildcard?
A regular expression is a pattern used to match text. A wildcard is a component you can use within a regular expression that indicates you are trying to match a more broadly-defined pattern than a specific set of characters.
What is delimiter in regex?
Delimiters. The first element of a regular expression is the delimiters. These are the boundaries of your regular expressions. The most common delimiter that you’ll see with regular expressions is the slash ( / ) or forward slash.
What data type is regex?
The Regexp data type The data type of regular expressions is Regexp . By default, Regexp matches any regular expression value. If you are looking for a type that matches strings which match arbitrary regular expressions, see the Pattern type.
What is a regex wildcard?
In regular expressions, the period ( . , also called “dot”) is the wildcard pattern which matches any single character. * it will match any number of any characters. In this case, the asterisk is also known as the Kleene star.
What is the difference between wild card character and *?
Difference between wildcards (*) and (?) A wildcard character is a kind of placeholder represented by a single character, such as an asterisk (*) and question mark (?), which can be interpreted as a number of literal characters or an empty string.
What is a delimiter in PHP?
A delimiter can be any non-alphanumeric, non-backslash, non-whitespace character. If the delimiter needs to be matched inside the pattern it must be escaped using a backslash. If the delimiter appears often inside the pattern, it is a good idea to choose another delimiter in order to increase readability.
Is backslash a delimiter?
The Microsoft Windows family of operating systems inherited the MS-DOS behavior and so still support either character – but individual Windows programs and sub-systems may, wrongly, only accept the backslash as a path delimiter, or may misinterpret a forward slash if it is used as such.
Does Google support regex?
Google Code Search supports regular expressions. Of course, the search target for this topic search engine is reduced to source code only. It is worth to mention that some Google search keywords can partially replace regular expressions.