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Unable to load config info from /usr/local/ssl/openssl.cnf on Windows
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openssl:Error: '-config' is an invalid command. how do you guys set it?
– benez
Dec 17 '15 at 14:01
1
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Useful GCC flags for C
...-arith: warn if anything depends upon the size of a function or of void.
-Wcast-align: warn whenever a pointer is cast such that the required alignment of the target is increased. For example, warn if a char * is cast to an int * on machines where integers can only be accessed at two- or four-byte ...
How do you determine the size of a file in C?
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You could probably change the return type to ssize_t and cast the size from an off_t without any trouble. It would seem to make more sense to use a ssize_t :-) (Not to be confused with size_t which is unsigned and cannot be used to indicate error.)
– Ted Perci...
How does delete[] know it's an array?
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try size_t size = *(reinterpret_cast<size_t *>(pArray) - 1) instead
– user6377043
Aug 12 '17 at 11:42
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How should I choose an authentication library for CodeIgniter? [closed]
I see there are a few . Which ones are maintained and easy to use? What are their pros and cons?
11 Answers
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Copy entire contents of a directory to another using php
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It seems that copy only handle single files. Here is a function for copying recursively I found in this note on the copy documentation page:
<?php
function recurse_copy($src,$dst) {
$dir = opendir($src);
@mkdir($dst);
while(false ...
Create a unique number with javascript time
... month, two digit day, two digit hour, two digit minute, two digit second, and three digit millisecond. So it would look something like this: 20111104103912732 ... this would give enough certainty of a unique number for my purposes.
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Java: Date from unix timestamp
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The cast to (long) is very important: without it the integer overflows.
– mneri
Jun 11 '14 at 17:18
2
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How to read/write a boolean when implementing the Parcelable interface?
... No reason to use byte over int. byte is more verbose because of the cast: dest.writeInt(myBoolean ? 1 : 0);
– miguel
Jan 17 '15 at 2:31
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How to determine if a string is a number with C++?
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You can do it the C++ way with boost::lexical_cast. If you really insist on not using boost you can just examine what it does and do that. It's pretty simple.
try
{
double x = boost::lexical_cast<double>(str); // double could be anything with >> operato...