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I want to use the pattern *1*. I have tried \*1\*, but it doesn't work. Where is the problem?
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The Match-zero-or-more Operator ( * ) This operator repeats the smallest possible preceding regular expression as many times as necessary (including zero) to match the pattern. `*' represents this operator. For example, `o*' matches any string made up of zero or more `o' s.
Resolution. To use 'regexp' syntax, you must use a / (slash) at the beginning and end of the regexp. To wildcard text at the beginning and ending of the line, add a ". *" (dot asterisk) to the beginning and end of the 'Actor Command Line'.
In all other cases, the asterisk is treated as a literal asterisk. While you do not need to escape asterisks everywhere in project files, doing so does no harm.
Operators: * , + , ? , | Anchors: ^ , $ Others: . , \ In order to use a literal ^ at the start or a literal $ at the end of a regex, the character must be escaped.
You have to escape it with a backslash:
/\*1\*/ Otherwise, an unescaped * in a RegExp will mean: Match 0 or more of the Preceding Character Group.
Update:
If you use the RegExp constructor, do it this way:
new RegExp("\\*1\\*") You have to double-escape the backslashes because they need to be escaped in the string itself.
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