case-insensitive

I know that the following is case sensitive: if (StringA == StringB) { So is there an operator which will compare two strings in an insensitive manner? Try this: string.Equals(a, b, StringComparison.CurrentCultureIgnoreCase); The best way to compare 2 strings ignoring the case of the letters is to use the String.Equals static method specifying an ordinal ignore case string comparison. This is also the fastest way, much faster than converting the strings to lower or upper case and comparing them after that. I tested the performance of both approaches and the ordinal ignore case string

What's the easiest way to do a case-insensitive string replacement in Python? Blair Conrad The string type doesn't support this. You're probably best off using the regular expression sub method with the re.IGNORECASE option. >>> import re >>> insensitive_hippo = re.compile(re.escape('hippo'), re.IGNORECASE) >>> insensitive_hippo.sub('giraffe', 'I want a hIPpo for my birthday') 'I want a giraffe for my birthday' import re pattern = re.compile("hello", re.IGNORECASE) pattern.sub("bye", "hello HeLLo HELLO") # 'bye bye bye' viebel In a single line: import re re.sub("(?i)hello","bye", "hello HeLLo

In Python, I can compile a regular expression to be case-insensitive using re.compile : >>> s = 'TeSt' >>> casesensitive = re.compile('test') >>> ignorecase = re.compile('test', re.IGNORECASE) >>> >>> print casesensitive.match(s) None >>> print ignorecase.match(s) <_sre.SRE_Match object at 0x02F0B608> Is there a way to do the same, but without using re.compile . I can't find anything like Perl's i suffix (e.g. m/test/i ) in the documentation. Michael Haren Pass re.IGNORECASE to the flags param of search , match , or sub : re.search('test', 'TeSt', re.IGNORECASE) re.match('test', 'TeSt', re

I would like to use case insensitive string as a HashMap key for the following reasons. During initialization, my program creates HashMap with user defined String While processing an event (network traffic in my case), I might received String in a different case but I should be able to locate the <key, value> from HashMap ignoring the case I received from traffic. I've followed this approach CaseInsensitiveString.java public final class CaseInsensitiveString { private String s; public CaseInsensitiveString(String s) { if (s == null) throw new NullPointerException(); this.s = s; } public

I have the following: if (referrer.indexOf("Ral") == -1) { ... } What I like to do is to make Ral case insensitive, so that it can be RAl , rAl , etc. and still match. Is there a way to say that Ral has to be case-insensitive? Add .toLowerCase() after referrer . This method turns the string in a lower case string. Then, use .indexOf() using ral instead of Ral . if (referrer.toLowerCase().indexOf("ral") === -1) { The same can also be achieved using a Regular Expression (especially useful when you want to test against dynamic patterns): if (!/Ral/i.test(referrer)) { // ^i = Ignore case flag for

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.replace("Foo", "") // would return "fooBar" How can I make it so replace (or if there is a more suitable method) is case-insensitive so that both examples return "Bar"? lukastymo String target = "FOOBar"; target = target.replaceAll("(?i)foo", ""); System.out.println(target); Output: Bar It's worth mentioning that replaceAll

I love using the expression if 'MICHAEL89' in USERNAMES: ... where USERNAMES is a list Is there any way to match items with case insensitivity or do I need to use a custom method? Just wondering if there is need to write extra code for this. Thanks to everyone! if 'MICHAEL89' in (name.upper() for name in USERNAMES): ... Alternatively: if 'MICHAEL89' in map(str.upper, USERNAMES): ... Or, yes, you can make a custom method. Alex Martelli I would make a wrapper so you can be non-invasive. Minimally, for example...: class CaseInsensitively(object): def __init__(self, s): self.__s = s.lower() def _