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Does C++ support 'finally' blocks? (And what's this 'RAII' I keep hearing about?)
... complicated.
A more detailed analysis can be found here: http://accu.org/index.php/journals/236
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How do BitTorrent magnet links work?
...rk2 operating a "distributed hash table" (DHT). A DHT is a big distributed index which maps torrents (identified by infohashes) to lists of peers (identified by IP address and ports) who are participating in a swarm for that torrent (uploading/downloading data or metadata).
The first time a client ...
Call An Asynchronous Javascript Function Synchronously
...n doAsync () {
var response = [];
var start = Date.now();
// each index is a promise returning function
var promiseFuncs= [doSomethingAsync, doSomethingAsync, doSomethingAsync];
for(var i = 0; i < promiseFuncs.length; ++i) {
var promiseFunc = promiseFuncs[i];
response.pus...
Pointers in C: when to use the ampersand and the asterisk?
...cond element
int i2 = a[1]; // the value of the second element
So the [] indexing operator is a special form of the * operator, and it works like this:
a[i] == *(a + i); // these two statements are the same thing
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How to get the input from the Tkinter Text Widget?
...-1c' are necessary for it to be a single string. 'end' is an alias for the index after the last character. So if 'end' was '3.8' then 'end-1c' would be '3.7'. I want to again recommend reviewing: Text widget indices.
– Honest Abe
Feb 14 '13 at 4:50
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What does Docker add to lxc-tools (the userspace LXC tools)?
... containers is a bit like trying to use Git with just commands like update-index and read-tree, without familiar tools like add, commit, and merge. Docker provides that layer of "porcelain" over the "plumbing" of LXC, enabling you to work with higher level concepts and worry less about the low-level...
MongoDB/NoSQL: Keeping Document Change History
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Will this affect performance if indexed fields represented as arrays?
– DmitriD
Jun 14 '17 at 2:28
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How do I (or can I) SELECT DISTINCT on multiple columns?
...ical to the human eye):
(123, NULL)
(123, NULL)
Also passes in a unique index and almost anywhere else, since NULL values do not compare equal according to the SQL standard. See:
Create unique constraint with null columns
OTOH, GROUP BY, DISTINCT or DISTINCT ON () treat NULL values as equal. ...
Conveniently Declaring Compile-Time Strings in C++
..."world", "");
// constexpr char x = world[5]; // Does not compile because index is out of range!
}
It doesn't get much cooler than compile-time range checking!
Both the use, and the implementation, is free of macros. And there is no artificial limit on string size. I'd post the implementation ...
How do I obtain a Query Execution Plan in SQL Server?
...s:
Because there are so many factors involved (ranging from the table and index schema down to the data stored and the table statistics) you should always try to obtain an execution plan from the database you are interested in (normally the one that is experiencing a performance problem).
You can'...