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 pointer exceptions. EDIT: Ok, the point was asked about canonical form. This article defines it as: Suppose we have some … Read more
If correct sorting is so important in your problem, just use ordinal string comparison instead of culture-sensitive. Only this one guarantees transitive and antisymmetric comparing you want. What MSDN says: Specifying the StringComparison.Ordinal or StringComparison.OrdinalIgnoreCase value in a method call signifies a non-linguistic comparison in which the features of natural languages are ignored. Methods that … Read more
If you mean, how to write something similar to this: // switch statement switch (string) { case “B1”: // do something break; /* more case “xxx” parts */ } Then the canonical solution in C is to use an if-else ladder: if (strcmp(string, “B1”) == 0) { // do something } else if (strcmp(string, “xxx”) … Read more
Ripped from msdn string.Equals Determines whether this instance and a specified object, which must also be a String object, have the same value. string.Compare Compares two specified String objects and returns an integer that indicates their relative position in the sort order. string.CompareTo Compares this instance with a specified object or String and returns an … Read more
Neither. If you want to be clever, compare to “string”sv, which returns a std::string_view. While comparing against a literal like “string” does not result in any allocation-overhead, it’s treated as a null terminated string, with all the concomittant disadvantages: No tolerance for embedded nulls, and users must heed the null terminator. “string”s does an allocation, … Read more
In your example you are comparing the string objects, not their content. Your comparison should be : if (s.equals(“/quit”)) Or if s string nullity doesn’t mind / or you really don’t like NPEs: if (“/quit”.equals(s))
dash is a very strict POSIX shell, if it work in dash it is almost certain it would work in other POSIX shell. Try: if [ “$var” = “string” ] then some_command fi
Use strcmp() to compare the contents of strings: if (strcmp(var1, “dev”) == 0) { } Explanation: in C, a string is a pointer to a memory location which contains bytes. Comparing a char* to a char* using the equality operator won’t work as expected, because you are comparing the memory locations of the strings rather … Read more
https://golang.org/pkg/strings/#EqualFold is the function you are looking for. It is used like this (example from the linked documentation): package main import ( “fmt” “strings” ) func main() { fmt.Println(strings.EqualFold(“Go”, “go”)) }
Absolutely. Per MSDN (http://msdn.microsoft.com/en-us/library/d93tkzah.aspx), This method performs a word (case-sensitive and culture-sensitive) search using the current culture. So you may get different results if you run it under a different culture (via regional and language settings in Control Panel). In this particular case, you probably won’t have a problem, but throw an i in the … Read more