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Rails hidden field undefined method 'merge' error
...flow.com%2fquestions%2f6636875%2frails-hidden-field-undefined-method-merge-error%23new-answer', 'question_page');
}
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How to convert jsonString to JSONObject in Java
...etype\":\"N95\",\"cat\":\"WP\"}");
}catch (JSONException err){
Log.d("Error", err.toString());
}
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Gunicorn worker timeout error
I have setup gunicorn with 3 workers 30 worker connections and using eventlet worker class. It is setup behind Nginx. After every few requests, I see this in the logs.
...
Obtain Bundle Identifier programmatically
...r!
– Sebastian Roth
Sep 14 '16 at 7:05
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What causes javac to issue the “uses unchecked or unsafe operations” warning
... Just to point out, this is not collections specific. You get the error because Java compiler can't ensure type safety in general. For example, same warning is produced with the following code: AbstractMap.SimpleEntry<String, String> entry = new AbstractMap.SimpleEntry("hello", "world...
How do I compute derivative using Numpy?
...
Finite differences require no external tools but are prone to numerical error and, if you're in a multivariate situation, can take a while.
Symbolic differentiation is ideal if your problem is simple enough. Symbolic methods are getting quite robust these days. SymPy is an excellent project for...
Requests — how to tell if you're getting a 404
...gt;> r.status_code
404
If you want requests to raise an exception for error codes (4xx or 5xx), call r.raise_for_status():
>>> r = requests.get('http://httpbin.org/status/404')
>>> r.raise_for_status()
Traceback (most recent call last):
File "<stdin>", line 1, in <...
ReferenceError: event is not defined error in Firefox
...login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f20522887%2freferenceerror-event-is-not-defined-error-in-firefox%23new-answer', 'question_page');
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MYSQL OR vs IN performance
...r;
$t2 = microtime(true);
echo $t."\n".$t2."\n".($t2-$t)."\n";
1482080514.3635
1482080517.3713
3.0078368186951
$t = microtime(true);
for($i=0; $i<10000; $i++):
$q = DB::table('users')->whereIn('id',[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20])->get();
endfor;
$t2 =...
Padding is invalid and cannot be removed?
...rent set of keys for decryption than used for encryption you will get this error:
Padding is invalid and cannot be removed
If you are using some algorithm to dynamically generate keys that will not work. They need to be the same for both encryption and decryption. One common way is to have the...