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What is “callback hell” and how and why does RX solve it?
... example that explains what is a "callback hell" for someone who does not know JavaScript and node.js ?
8 Answers
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select count(*) from table of mysql in php
... removed entirely in 7. Let's make it easier to upgrade and start using it now.
$dbh = new \PDO($dsn, $user, $password);
$sth = $dbh->prepare('SELECT count(*) as total from Students');
$sth->execute();
print_r($sth->fetchAll());
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Android Use Done button on Keyboard to click button
...ean onEditorAction(TextView v, int actionId, KeyEvent event) {
if ((event != null && (event.getKeyCode() == KeyEvent.KEYCODE_ENTER)) || (actionId == EditorInfo.IME_ACTION_DONE)) {
Log.i(TAG,"Enter pressed");
}
return false;
}
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Django REST framework: non-model serializer
...ired calculations and returns its results in a tuple to the REST api view. If JSON and/or XML fits your needs, django-rest-framework will take care of the serialization for you.
You can skip steps 2 and 3 in this case, and just use one class for calculations and one for presentation to the API cons...
Regular vs Context Free Grammars
...copies of y.) You basically have one "nonterminal" that can be expanded.
Now, what about context-free languages? There's an analogous pumping lemma for context-free languages that breaks the strings in the language into five parts, uvxyz, and where all instances of the language are in uvixyiz, fo...
How to sort with a lambda?
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What you have written so far makes little sense. If mProperty is supposed to be an int a.mProperty>b.mProperty will definitely yield a bool.
– sellibitze
Feb 26 '11 at 0:32
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In Python, when should I use a function instead of a method?
...ule is this - is the operation performed on the object or by the object?
if it is done by the object, it should be a member operation. If it could apply to other things too, or is done by something else to the object then it should be a function (or perhaps a member of something else).
When intro...
How to get JQuery.trigger('click'); to initiate a mouse click
...xpense_tickets value is changed, and also, when page is reload
});
// now we trigger the change event
$("#expense_tickets").trigger("change");
})
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An async/await example that causes a deadlock
...hat was returned by GetStringAsync.
The continuation for GetJsonAsync is now ready to run, and it waits for the context to be available so it can execute in the context.
Deadlock. The top-level method is blocking the context thread, waiting for GetJsonAsync to complete, and GetJsonAsync is waiti...
Streaming Audio from A URL in Android using MediaPlayer?
...st tried commenting-out the "mediaPlayer.release()" line in onPause(), and now my app doesn't crash upon unlocking.
– CiaranC94
Jul 21 '16 at 10:17
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