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Does assignment with a comma work?
...ds (from left to right) and returns the value of the second operand.
This code:
aaa = 1,2,3
Is equivalent to:
aaa = 1;
2;
3;
So aaa is implicitly declared and assigned a value of 1. Notice that the output on the console is the result of the last statement, 3.
This code:
var bbb = 1,2,3...
Is there a difference between copy initialization and direct initialization?
Suppose I have this function:
9 Answers
9
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How did I get a value larger than 8 bits in size from an 8-bit integer?
I tracked down an extremely nasty bug hiding behind this little gem. I am aware that per the C++ spec, signed overflows are undefined behavior, but only when the overflow occurs when the value is extended to bit-width sizeof(int) . As I understand it, incrementing a char shouldn't ever be undefin...
Create a folder if it doesn't already exist
...
Try this, using mkdir:
if (!file_exists('path/to/directory')) {
mkdir('path/to/directory', 0777, true);
}
Note that 0777 is already the default mode for directories and may still be modified by the current umask.
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Are HTTPS headers encrypted?
When sending data over HTTPS, I know the content is encrypted, however I hear mixed answers about whether the headers are encrypted, or how much of the header is encrypted.
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Are the days of passing const std::string & as a parameter over?
... largely gone. He suggested that writing a function such as the following is now preferable:
13 Answers
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MYSQL OR vs IN performance
I am wondering if there is any difference in regards to performance between the following
14 Answers
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String's Maximum length in Java - calling length() method
In Java , what is the maximum size a String object may have, referring to the length() method call?
7 Answers
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What is JSONP, and why was it created?
I understand JSON, but not JSONP. Wikipedia's document on JSON is (was) the top search result for JSONP. It says this:
10...
Why is React's concept of Virtual DOM said to be more performant than dirty model checking?
...nd the speaker mentioned that dirty-checking of the model can be slow. But isn't calculating the diff between virtual DOMs actually even less performant since the virtual DOM, in most of the cases, should be bigger than model?
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