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call a static method inside a class?
...o the most common way of calling a static method:
self::staticMethod();
Now, before you start thinking that the :: is the static call operator, let me give you another example:
self::bar();
This will print baz = 1, which means that $this->bar() and self::bar() do exactly the same thing; tha...
How to store a dataframe using Pandas
Right now I'm importing a fairly large CSV as a dataframe every time I run the script. Is there a good solution for keeping that dataframe constantly available in between runs so I don't have to spend all that time waiting for the script to run?
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py2exe - generate single executable file
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I am now using version 1.5.1, and it works with Python 2.7.2.
– oob
Jan 2 '12 at 3:35
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Why .NET String is immutable? [duplicate]
As we all know, String is immutable. What are the reasons for String being immutable and the introduction of StringBuilder class as mutable?
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What is the equivalent of the C# 'var' keyword in Java?
...es had names, even if they were extremely verbose and unweildy). I do not know if this has changed in the mean time.
var is not the same as dynamic. variables are still 100% statically typed. This will not compile:
var myString = "foo";
myString = 3;
var is also useful when the type is obvious fro...
LINQ query on a DataTable
... any more complicated than the call to Cast<DataRow>(). As far as I know, the performance is the same, so it's just a matter of preference.
– Collin K
Jun 26 '14 at 16:29
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CSS customized scroll bar in div
...lbar-shadow-color:
}
Chrome & Safari (WebKit)
Similarly, WebKit now has its own version:
Styling scrollbars: https://www.webkit.org/blog/363/styling-scrollbars/
Demo of all WebKit scroll bar styling
From Custom scrollbars in WebKit, relevant CSS:
/* pseudo elements */
::-webkit-scrollb...
How can I use numpy.correlate to do autocorrelation?
... (There's probably a formal term for this, but I'm gonna use "partial" for now).
I've created 5 functions that compute auto-correlation of a 1d array, with partial v.s. non-partial distinctions. Some use formula from statistics, some use correlate in the signal processing sense, which can also be ...
How do I modify fields inside the new PostgreSQL JSON datatype?
...LANGUAGE sql IMMUTABLE STRICT
COST 100;
Update: functions are compacted now.
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PHP & mySQL: Year 2038 Bug: What is it? How to solve it?
...re.
What exactly is the Year 2038 problem?
"The year 2038 problem (also known as Unix Millennium Bug, Y2K38 by analogy to the Y2K problem) may cause some computer software to fail before or in the year 2038. The problem affects all software and systems that store system time as a signed 32-bit int...