![]() ![]() This method returns true if the strings are equal, and false if not. You can find description of Javas regex language in the JDK documentation for Pattern class. Val result = EmailPattern.matcher("StringToMatch"). The equalsIgnoreCase () method compares two strings, ignoring lower case and upper case differences. Clojure simply uses slightly different regex language that it inherited from Java, so you need to write regex as following: (str/replace (str/lower-case str1) ' (:abc)' 'XYZ') outputs 'XYZ store of john'. ![]() It's a Java approach, but it can be used in Scala too. I recently was provided with a very long case insensitive Java regex, I decided just not mess with it and left it as it is. Scala> patternic findPrefixMatchOf " vi " Scala> patternic findPrefixMatchOf " VI " Pattern: = (\sI\s|\sII\s|\sIII\s|\sIV\s|\sV\s|\sVI\s|\sVII\s|\sVIII\s|\sIX\s) This method compares two strings lexicographically, ignoring case differences. Of course that does include the 'i' option for case. MongoDB uses the pcre library ( or at least compatible ) so use expressions that match that constraint. Without the specifics you will not get a 'specific' match. Use enum directly instead of this field. Or specifically at the 'start' of the string: /foob/i. This constant will be removed in the future version. """(?i)(\sI\s|\sII\s|\sIII\s|\sIV\s|\sV\s|\sVI\s|\sVII\s|\sVIII\s|\sIX\s)""".rĮxample in scala interpreter: scala> val pattern = For 'foo' and only 'foo' anywhere in the string, use this: /bfoob/i. Yes, case insensitivity can be enabled and disabled at will in Java regex. Use the Java regex special construct (?i) at the front of your regex for case-insensitive matching: 156 Using the method replace (CharSequence target, CharSequence replacement) in String, how can I make the target case-insensitive For example, the way it works right now: String target 'FooBar' target.replace ('Foo', '') // would return 'Bar' String target 'fooBar' target. ![]() search just against "Bill").Try something like this: "\\s(?i)(?:I|I?X)\\b" Regex to ignore case sensitive String Java script. Regular expression to match whole string but case insentitive. If you want only part of the regex to be case. Nearly all regex engines support it: /G a-b./i string.match ('G a-b.', 'i') Check the documentation for your language/platform/tool to find how the matching modes are specified. ![]() They offer an extra hand in making up Regular Expressions more efficient and widely applicable. Assuming you want the whole regex to ignore case, you should look for the i flag. convert "bill" to "Bill").ĭo a search against your known case (e.g. For cases like these, JS Regex offers a feature called flag. I want to replace the Checkout String in the Deleted Line. As such, depending on your use case, a better alternative might be to use application logic in some way, for example:Įnforce a case when you insert items into the database (e.g. String Checkout D:ifsAPPCheckout String DeleteLine D: Note the ifs and IFS in both Strings. You may pay a substantial performance penalty over using a query that uses an index. When you use this as flag value to the compile() method and if you search for characters using regular expressions characters of both cases will be matched. of the form /^prefix/) and if the i case-insensitive flag is not used. Pattern CASE INSENSITIVE field in Java with examples - This CASEINSENSITIVE field of the Pattern class matches characters irrespective of case. To solve this, also use Pattern.quote as suggested in the comments. However, a regex query will not use an index, except if it is left-rooted (ie. 10 Answers Sorted by: 356 String target 'FOOBar' target target.replaceAll (' (i)foo', '') (target) Output: Bar It's worth mentioning that replaceAll treats the first argument as a regex pattern, which can cause unexpected results. Here is an example showing this (in the mongo shell): > db.foo.insert( The regex /^bill$/i will match just against "Bill" in a case-insensitive manner. ![]()
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