How to count instances of character in SQL Column
In SQL Server:
string
Taking a new line using printf in java? Is %n correct?
Yes, %n is a newline in printf. See the documentation of java.util.Formatter, specifically the conversion table which specifies: ‘n‘ line separator The result is the platform-specific line separator Your output currently only has a linebreak at the end, not at the points that you seem to want them. You would need to use a format like: (and maybe … Read more
Meaning of #{ } in Ruby?
Why This Is a Good Question This is a tough question to Google for unless you know the right search terms. The #{} operator technically performs expression substitution inside a string literal. The Answer The #{} literal is the operator used for interpolation inside double-quoted strings the same way that the backticks or $() construct would be used in Bash. From a practical point of view, … Read more
Extract filename and extension in Bash
First, get file name without the path: Alternatively, you can focus on the last ‘/’ of the path instead of the ‘.’ which should work even if you have unpredictable file extensions: You may want to check the documentation : On the web at section “3.5.3 Shell Parameter Expansion“ In the bash manpage at section … Read more
Difference between char* and char** (in C)
char* is a pointer to char, char ** is a pointer to a pointer to char. char *ptr; does NOT allocate memory for characters, it allocates memory for a pointer to char. char arr[10]; allocates 10 characters and arr holds the address of the first character. (though arr is NOT a pointer (not char *) … Read more
Standard function to replace character or substring in a char array?
I need a function from the standard library that replaces all occurrences of a character in a string by another character. I also need a function from the standard library that replaces all occurrences of a substring in a string by another string. I need a function from the standard library that replaces all occurrences … Read more
How to remove first character from C-string?
Or, if the pointer can be modified:
Trim a string in C [duplicate]
There is no standard library function to do this, but it’s not too hard to roll your own. There is an existing question on SO about doing this that was answered with source code.
Lua String replace
Try: See also: http://lua-users.org/wiki/StringLibraryTutorial
Passing string to a function in C – with or without pointers?
The accepted convention of passing C-strings to functions is to use a pointer: When the function modifies the string you should also pass in the length: Your first example: passes an array of pointers to strings which is not what you need at all. Your second example: passes an array of chars. The size of … Read more