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A few minor notes: Have the function StringReduction(str) strictly speaking, the parameter name is different: function StringReduction(s) :-) var original, key; I'd put the va …

You could create a few explanatory local variables: $lettersNumbersSpacesHypens = '/[^\-\sa-zA-Z0-9]+/'; $spacesAndDuplicateHyphens = '/[\-\s]+/'; Usage: $lettersNumbersSpacesHypens = '/[^\-\sa-z …

It would be much easier with BigDecimals: String input = "00007.880000"; BigDecimal hundred = BigDecimal.valueOf(100); BigDecimal result = new BigDecimal(input).multiply(hundred).stripTrailingZeros( …

Actually, there is an even better structure than maps and arrays for this kind of counting: Multisets. Documentation of Google Guava mentions a very similar case: The traditional Java idiom for e …

The second version looks fine. Anyway, two other quick ideas: Consider replacing only complete words (substrings which has whitespace before and after). Sort the term list by length (descending) and …

It looks fine. Some readability improvements: I'd rename some variables first: mismatches should be tolerance, mismatchTolerance or allowedMismatches. For me mismatches sounds like a counter but i …

It seems data envy. I'd create nameContains method in the Manager class. public boolean nameContains(final String searchText) { if (StringUtils.contains(name, searchText)) { return true; …

You could create a StringProcessor interface: public interface StringProcessor { String process(String input); } public class BoldProcessor implements StringProcessor { public String proc …

You're using the same variable for two different purpose. It would be readable with separate variables: $urlWithoutParameters = strstr($url, "?", true); if ($urlWithoutParameters !== FALSE) { // …

Learn from the existing implementations, they usually have solutions to corner cases and common pitfalls. For example, Apache Commons Lang StringUtils also has a reverse function. Its implementation i …

Ideas I had in mind were simply using char[] instead of strings being that strings are immutable and each time I concatenate the Strings, I am creating a new String object which is not efficient at … Go ahead and write it :-) Instead of Strings like strResult and strBuffer you could use StringBuilders (although using char is probably faster). …

Another idea is storing an array of strings in the ThreadLocal and extending the array on demand if the required lenght is longer than paddings.lenght: String paddings[] = new String[max]; for (int i …

Some general idea, I hope all work in C# too. Feel free to edit the answer if it is not a proper C# syntax. 1, Change the type of the characters list to char and change the loop variable to char too. …

According to the Code Conventions for the Java Programming Language if statements always use braces {}. It's error-prone, so change if(chars == null) return null; to if (chars == null) …

I agree with @Mike Nakis, plus: 1, The first loop could be changed to int holder[26] = {0}; How to initialize an array in C 2, The second loop doesn't check that bytes[i] - 97 is lower than 0 or …