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Random Gaussian Variables
...PI) * Math.Exp(-((x - μ) * (x - μ)) / (2 * σ * σ));
}
Important: Select the interval of y and the parameters σ and μ so that the curve of the function is not cutoff at it's maximum/minimum points (e.g. at x=mean). Think of the intervals of x and y as a bounding box, in which the curve mu...
Extract subset of key-value pairs from Python dictionary object?
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This answer uses a dictionary comprehension similar to the selected answer, but will not except on a missing item.
python 2 version:
{k:v for k, v in bigDict.iteritems() if k in ('l', 'm', 'n')}
python 3 version:
{k:v for k, v in bigDict.items() if k in ('l', 'm', 'n')}
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Frame Buster Buster … buster code needed
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This answer or mine should be selected :)
– user1646111
Sep 2 '13 at 12:12
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UIPanGestureRecognizer - Only vertical or horizontal
...ction detection happens prior to sending Began action, so your pan gesture selector receives no messages if the wrong direction is swiped.
After initial direction is determined, direction logic is no longer consulted. This results in the generally desired behavior of activating your recognizer if th...
How to debug PDO database queries?
...gt;setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING );
$db->query('SELECT *******');
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Is there an eval() function in Java? [duplicate]
... Java class or method that will do what you want. Your options include:
Select and use some third-party expression evaluation library. For example JEL or any of the half dozen libraries listed here.
Wrap the expression in the Java source code for a class with an eval method, send that to the Jav...
What is the difference between static_cast and C style casting?
...situations where all that is needed is a simple conversion. The ability to select between several different casting operators of differing degrees of power can prevent programmers from inadvertently casting to an incorrect type.
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string.IsNullOrEmpty(string) vs. string.IsNullOrWhiteSpace(string)
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The best practice is selecting the most appropriate one.
.Net Framework 4.0 Beta 2 has a new IsNullOrWhiteSpace() method for
strings which generalizes the IsNullOrEmpty() method to also include other white
space besides empty string.
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How to annotate MYSQL autoincrement field with JPA annotations
...oblem is saving the object Operator into MySQL DB.
Prior to save, I try to select from this table and it works, so is connection to db.
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How do you usually Tag log entries? (android)
...Android Studio -> preference -> Live Templates -> AndroidLog then select Log.d(TAG, String).
In Template text replace
android.util.Log.d(TAG, "$METHOD_NAME$: $content$");
with
android.util.Log.d("$className$", "$METHOD_NAME$: $content$");
Then click Edit variables and enter classN...