Use this regex to remove all punctuation and spaces and convert it to lower case String palindrome = “…” // from elsewhere boolean isPalindrome = palindrome.replaceAll(“[^A-Za-z]”, “”).toLowerCase().equals(new StringBuilder(palindrome.replaceAll(“[^A-Za-z]”, “”).toLowerCase()).reverse().toString());
You might want to check out the Levenshtein Distance algorithm as a starting point. It will rate the “distance” between two words. This SO thread on implementing a Google-style “Do you mean…?” system may provide some ideas as well.
In C++ the std::string class implements the comparison operators, so you can perform the comparison using == just as you would expect: if (string == “add”) { … } When used properly, operator overloading is an excellent C++ feature.
PHP will compare alpha strings using the greater than and less than comparison operators based upon alphabetical order. In the first example, ai comes before i in alphabetical order so the test of > (greater than) is false – earlier in the order is considered ‘less than’ rather than ‘greater than’. In the second example, … Read more
Declaring an error, and comparing it with ‘==‘ (as in err == myPkg.ErrTokenExpired) is no longer the best practice with Go 1.13 (Q3 2019) The release notes mentions: Go 1.13 contains support for error wrapping, as first proposed in the Error Values proposal and discussed on the associated issue. An error e can wrap another … Read more
Sort your data with: function sortScripts($a, $b) { return $a[‘order’] – $b[‘order’]; } Use $b-$a if you want the reversed order. If the numbers in question exceed PHP’s integer range, return ($a < $b) ? -1 : (($a > $b) ? 1 : 0) is more robust.
If you want to find out only whether or not the files are identical, you can use the Windows fc command in binary mode: fc.exe /b file1 file2 For details, see the reference for fc
Use indexOf() to get the position of each element in the reference array, and use that in your comparison function. var reference_array = [“ryan”, “corbin”, “dan”, “steven”, “bob”]; var array = [“bob”, “dan”, “steven”, “corbin”]; array.sort(function(a, b) { return reference_array.indexOf(a) – reference_array.indexOf(b); }); console.log(array); // [“corbin”, “dan”, “steven”, “bob”] Searching the reference array every time … Read more
Requires commons-lang3-3.8.1.jar for string operations. /** * Compares two version strings. * * Use this instead of String.compareTo() for a non-lexicographical * comparison that works for version strings. e.g. “1.10”.compareTo(“1.6”). * * @param v1 a string of alpha numerals separated by decimal points. * @param v2 a string of alpha numerals separated by decimal points. … Read more
sqldf provides a nice solution a1 <- data.frame(a = 1:5, b=letters[1:5]) a2 <- data.frame(a = 1:3, b=letters[1:3]) require(sqldf) a1NotIna2 <- sqldf(‘SELECT * FROM a1 EXCEPT SELECT * FROM a2’) And the rows which are in both data frames: a1Ina2 <- sqldf(‘SELECT * FROM a1 INTERSECT SELECT * FROM a2’) The new version of dplyr has … Read more