Leading from answers from @Bozho and @aioobe, lexicographic comparisons are similar to the ordering that one might find in a dictionary. The Java String class provides the .compareTo () method in order to lexicographically compare Strings. It is used like this “apple”.compareTo (“banana”). The return of this method is an int which can be interpreted … Read more
Yes, == is case sensitive. You can use strcasecmp for case insensitive comparison
There is no function that does this in the C standard. Unix systems that comply with POSIX are required to have strcasecmp in the header strings.h; Microsoft systems have stricmp. To be on the portable side, write your own: int strcicmp(char const *a, char const *b) { for (;; a++, b++) { int d = … Read more
Seems question is not about strings equality, but of sets equality. You can compare them this way only by splitting strings and converting them to sets: s1 = ‘abc def ghi’ s2 = ‘def ghi abc’ set1 = set(s1.split(‘ ‘)) set2 = set(s2.split(‘ ‘)) print set1 == set2 Result will be True
How about using Python’s distutils.version.StrictVersion? >>> from distutils.version import StrictVersion >>> StrictVersion(‘10.4.10’) > StrictVersion(‘10.4.9’) True So for your cmp function: >>> cmp = lambda x, y: StrictVersion(x).__cmp__(y) >>> cmp(“10.4.10”, “10.4.11”) -1 If you want to compare version numbers that are more complex distutils.version.LooseVersion will be more useful, however be sure to only compare the same … Read more
Because it is really different symbols even they look the same, first is the actual letter and has char code = 956 (0x3BC) and the second is the micro sign and has 181 (0xB5). References: Unicode Character ‘GREEK SMALL LETTER MU’ (U+03BC) Unicode Character ‘MICRO SIGN’ (U+00B5) So if you want to compare them and … Read more
“608E-4234” is the float number format, so they will cast into number when they compares. 608E-4234 and 272E-3063 will both be float(0) because they are too small. For == in php, If you compare a number with a string or the comparison involves numerical strings, then each string is converted to a number and the … Read more
Because it is really different symbols even they look the same, first is the actual letter and has char code = 956 (0x3BC) and the second is the micro sign and has 181 (0xB5). References: Unicode Character ‘GREEK SMALL LETTER MU’ (U+03BC) Unicode Character ‘MICRO SIGN’ (U+00B5) So if you want to compare them and … Read more
The common way of calculating the similarity between two strings in a 0%-100% fashion, as used in many libraries, is to measure how much (in %) you’d have to change the longer string to turn it into the shorter: /** * Calculates the similarity (a number within 0 and 1) between two strings. */ public … Read more
You’re looking for casecmp. It returns 0 if two strings are equal, case-insensitively. str1.casecmp(str2) == 0 “Apple”.casecmp(“APPLE”) == 0 #=> true Alternatively, you can convert both strings to lower case (str.downcase) and compare for equality.