string-comparison

Let's say I have a String array that contains some letters and punctuation String letter[] = {"a","b","c",".","a"}; In letter[3] we have "." How can I check if a string is a punctuation character? We know that there are many possible punctuation characters (,.?! etc.) My progress so far: for (int a = 0; a < letter.length; a++) { if (letter[a].equals(".")) { //===>> i'm confused in this line System.out.println ("it's punctuation"); } else { System.out.println ("just letter"); } } Karthik T Do you want to check more punctuations other than just . ? If so you can do this. String punctuations = ".

I'm trying to compare a character array against a string like so: const char *var1 = " "; var1 = getenv("myEnvVar"); if(var1 == "dev") { // do stuff } This if statement never validates as true... when I output var1 it is "dev", I was thinking maybe it has something to do with a null terminated string, but the strlen of "dev" and var1 are equal... I also thought maybe var1 == "dev" was comparing "dev" against the memory location of var1 instead of the value. *var1 == "dev" results in an error.... tried many things, probably a simple solution for the saavy c++ developer (I havent coded c++ in a

I know this issue has been noted before , more or less concisely, but I still create this new thread because I ran into the issue again when writing a unit test. The default string comparison (that is the culture-dependent case-sensitive comparison that we get with string.CompareTo(string) , Comparer<string>.Default , StringComparer.CurrentCulture , string.Compare(string, string) and others) violates transitivity when the strings contain hyphens (or minus signs, I am talking about plain U+002D characters). Here is a simple repro: static void Main() { const string a = "fk-"; const string b = "

I have a question about comparing a string with the empty string in Java. Is there a difference, if I compare a string with the empty string with == or equals ? For example: String s1 = "hi"; if (s1 == "") or if (s1.equals("")) I know that one should compare strings (and objects in general) with equals , and not == , but I am wondering whether it matters for the empty string. s1 == "" is not reliable as it tests reference equality not object equality (and String isn't strictly canonical). s1.equals("") is better but can suffer from null pointer exceptions. Better yet is: "".equals(s1) No null

Possible Duplicate: Are there any Fuzzy Search or String Similarity Functions libraries written for C#? What is the best way to compare 2 strings to see how similar they are? Examples: My String My String With Extra Words Or My String My Slightly Different String What I am looking for is to determine how similar the first and second string in each pair is. I would like to score the comparison and if the strings are similar enough, I would consider them a matching pair. Is there a good way to do this in C#? Marty Neal static class LevenshteinDistance { public static int Compute(string s, string