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Difference between API and ABI
...ines the API plus the machine language for a particular CPU family. An API does not ensure runtime compatibility, but an ABI does, because it defines the machine language, or runtime, format.
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What's the difference between “static” and “static inline” function?
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Actually inline doesn't instruct the compiler to do any attempts at inlining. It merely lets the programmer to include function body in multiple translation units without ODR violation. A side effect of this is that it's makes it possible fo...
Difference between C++03 throw() specifier C++11 noexcept
...true, then the noexcept sticks. If the boolean is false, then the noexcept doesn't stick and the function may throw.
Thus, you can do something like this:
struct<typename T>
{
void CreateOtherClass() { T t{}; }
};
Does CreateOtherClass throw exceptions? It might, if T's default construct...
What is the difference between ports 465 and 587?
...arted by STARTTLS command at SMTP level if server supports it and your ISP does not filter server's EHLO reply (reported 2014).
Port 25 is used by MTA to MTA communication (mail server to mail server). It may be used for client to server communication but it is not currently the most recommended....
Rails: How can I set default values in ActiveRecord?
...after_initialize callback is probably the best way to do. Just a question: does it work with dirty yet unsaved objects ? In your example, will Person.new.number_was return 0.0 ?
– Laurent Farcy
Apr 3 '12 at 11:54
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How to get last inserted row ID from WordPress database?
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Straight after the $wpdb->insert() that does the insert, do this:
$lastid = $wpdb->insert_id;
More information about how to do things the WordPress way can be found in the WordPress codex. The details above were found here on the wpdb class page
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Assign variable in if condition statement, good practice or not? [closed]
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The last example doesn't work, however, if you're testing for fail/success of a function that returns a boolean. In other words, while if (resultArr = myNeedle.exec(myHaystack)) {...} works, if ((resultArr = myNeedle.exec(myHaystack)) === tr...
Multi-statement Table Valued Function vs Inline Table Valued Function
...case, the two functions are not functionally equivalent. The MSTV function does an extra query each time it is called and, most importantly, filters on the customer id. In a large query, the optimizer would not be able to take advantage of other types of joins as it would need to call the function f...
How to combine two or more querysets in a Django view?
...lliciari Chain uses significantly less memory than list.extend, because it doesn't need to load both lists fully into memory.
– Dan Gayle
Apr 15 '15 at 17:17
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How to check whether a file or directory exists?
..../conf/app.ini"); err != nil {
if os.IsNotExist(err) {
// file does not exist
} else {
// other error
}
}
See : http://golang.org/pkg/os/#IsNotExist
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