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What does the plus sign do in '+new Date'
...d the automatic type conversion that's implied there through a regression? Now your code just doesn't work! .getTime() will always insure it does.
– tkone
Oct 11 '12 at 2:13
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Sample random rows in dataframe
... sample_frac) have been superseded by slice_sample, though they remain for now.
– Matt_B
Sep 4 at 2:50
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What are sessions? How do they work?
... to store that data server side, give it an "id", and let the client only know (and pass back at every http request) that id. There you go, sessions implemented. Or you can use the client as a convenient remote storage, but you would encrypt the data and keep the secret server-side.
Of course there...
Adding devices to team provisioning profile
...lt. So add your device through the portal and hit refresh - your device is now auto-magically attached to your provisioning profile.
– thattyson
Aug 5 '15 at 20:28
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PHP/MySQL insert row then get 'id'
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As to PHP's website, mysql_insert_id is now deprecated and we must use PDO. To do this with PDO, proceed as following:
$db = new PDO('mysql:dbname=database;host=localhost', 'user', 'pass');
$statement = $db->prepare('INSERT INTO people(name, city) VALUES(:name,...
Proper indentation for Python multiline strings
...iable name from string to text or anything of a different length, then you now need to update the indentation of literally every single line of the multiline string just to get it to match up with the """ properly. Indentation strategy should not complicate future refactors/maintenance, and it's one...
Is there a way to detect if a browser window is not currently active?
...ecommendation status thanks to the W3C. The Page Visibility API (on MDN) now allows us to more accurately detect when a page is hidden to the user.
document.addEventListener("visibilitychange", onchange);
Current browser support:
Chrome 13+
Internet Explorer 10+
Firefox 10+
Opera 12.10+ [read...
Adding external library in Android studio
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I know it by experience and inspecting.... But there are docs available : developer.android.com/sdk/installing/studio-build.html
– malcubierre
Sep 2 '14 at 6:28
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JavaScript function order: why does it matter?
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var foo = 42;
//the interpreter turns it into this:
var foo;
foo = 42;
Now, how function declarations are handled:
var foo = 42;
function bar() {}
//turns into
var foo; //Insanity! It's now at the top
function bar() {}
foo = 42;
The var statements "throws" the creation of foo to the very top...
Rule-of-Three becomes Rule-of-Five with C++11?
...since C++11 was passed? I believe struct C { virtual ~C() = default; }; is now allowed and the most concise option. The prohibition ("- it shall not be virtual") from n3242 is not present anymore in n3290 and GCC allows it while previously it didn't.
– Luc Danton
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