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What is your favorite C programming trick? [closed]

...re you can write "str[]" as the last member of a struct). you could make a string "object" like this: struct X { int len; char str[1]; }; int n = strlen("hello world"); struct X *string = malloc(sizeof(struct X) + n); strcpy(string->str, "hello world"); string->len = n; here, we've...
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What is the relative performance difference of if/else versus switch statement in Java?

... First create some interface: public interface Action { void execute(String input); } And get hold of all implementations in some Map. You can do this either statically or dynamically: Map<String, Action> actions = new HashMap<String, Action>(); Finally replace the if/else or ...
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byte[] to file in Java

...e(filePath).toPath(), data); Where data is your byte[] and filePath is a String. You can also add multiple file open options with the StandardOpenOptions class. Add throws or surround with try/catch. share | ...
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ReactJS render string with non-breaking spaces

I have some props that has a string that could contain characters such as &. It also contains spaces. I want to replace all spaces with   . ...
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Is there a date format to display the day of the week in java?

...rmatter f = DateTimeFormatter.ofPattern( “uuuu-MM-EEE” , Locale.US ) ; String output = ld.format( f ) ; ISO 8601 By the way, you may be interested in the standard ISO 8601 week numbering scheme: yyyy-Www-d. 2018-W01-2 Week # 1 has the first Thursday of the calendar-year. Week starts on...
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What is output buffering?

...n pieces as PHP processes the HTML. All the fancy stuff we can do with PHP strings, we can now do with our whole HTML page as one variable. If you've ever encountered the message "Warning: Cannot modify header information - headers already sent by (output)" while setting cookies, you'll be happy to ...
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Convert a list to a string in C#

How do I convert a list to a string in C#? 13 Answers 13 ...
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SQL - The conversion of a varchar data type to a datetime data type resulted in an out-of-range valu

... Just used cast(SUBSTRING([MyDateField],1,2) as integer) > 31 and found a record with the 60th of December. Who enters this stuff, Dr Suess? – SteveCav Oct 21 '15 at 22:11 ...
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When should the volatile keyword be used in C#?

...t (40203Ch)] 00401045 call dword ptr [__imp_std::basic_ostream<char,std::char_traits<char> >::operator<< (402038h)] } 0040104B xor eax,eax 0040104D pop ecx 0040104E ret Looking at the output, the compiler has decided to use the ecx re...
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What is the maximum possible length of a .NET string?

What is the longest string that can be created in .NET? The docs for the String class are silent on this question as far as I can see, so an authoritative answer might require some knowledge of internals. Would the maximum change on a 64-bit system? ...