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Purpose of Unions in C and C++
... @legends2k: any decent optimizer will recognize bitwise operations that select an entire byte and generate code to read/write the byte, same as the union but well-defined (and portable). e.g. uint8_t getRed() const { return colour & 0x000000FF; } void setRed(uint8_t r) { colour = (colour &...
How to split a string with any whitespace chars as delimiters
...lit() to split a String into an Array of substrings using all whitespace characters ( ' ' , '\t' , '\n' , etc.) as delimiters?
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How can I convert a std::string to int?
...i: cplusplus.com/reference/cstdlib/atoi "The string can contain additional characters after those that form the integral number, which are ignored and have no effect on the behavior of this function."
– Tin Wizard
Jul 25 '16 at 20:22
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Count occurrences of a char in plain text file
Is there any way under linux/terminal to count, how many times the char f occurs in a plain text file?
5 Answers
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'printf' vs. 'cout' in C++
... namespace problems - as long you have a class (which isn't limited to one character), you can have working std::ostream overloading for it.
However, I doubt that many people would want to extend ostream (to be honest, I rarely saw such extensions, even if they are easy to make). However, it's here...
What's the difference between utf8_general_ci and utf8_unicode_ci?
...or "ǽ" == "æ". For sorting this makes sense but could be surprising when selecting via equalities or dealing with unique indices - bugs.mysql.com/bug.php?id=16526
– Mat Schaffer
Mar 13 '15 at 15:22
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How to automatically generate a stacktrace when my program crashes
...gfault
}
void bar() { baz(); }
void foo() { bar(); }
int main(int argc, char **argv) {
signal(SIGSEGV, handler); // install our handler
foo(); // this will call foo, bar, and baz. baz segfaults.
}
Compiling with -g -rdynamic gets you symbol info in your output, which glibc can use to mak...
Pretty-Printing JSON with PHP
... 5.5.3 here, just seems to add a bit of spacing between the characters, not any actual indenting.
– user393219
Jan 30 '14 at 1:33
35
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Why can't strings be mutable in Java and .NET?
... data. For many string operations, this means that the underlying array of characters does not need to be copied. For example, say you want to take the five first characters of String. In Java, you would calls myString.substring(0,5). In this case, what the substring() method does is simply to creat...
How to create a file in Android?
... InputStreamReader isr = new InputStreamReader(fIn);
/* Prepare a char-Array that will
* hold the chars we read back in. */
char[] inputBuffer = new char[TESTSTRING.length()];
// Fill the Buffer with data from the file
isr.read(inputBuffer);
// Tra...