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Deleting DataFrame row in Pandas based on column value
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how to do that if we don't know the column name?
– Piyush S. Wanare
Jul 3 '18 at 13:20
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Difference between Covariance & Contra-variance
...s T → IE<T>. Notice that this is a "thin arrow".
With me so far?
Now let's consider a relation. There is an assignment compatibility relationship between pairs of types in the first set. A value of type Tiger can be assigned to a variable of type Animal, so these types are said to be "assi...
JavaScript ternary operator example with functions
...unction() ? imlost() : whathappuh() : lostinsyntax() : thisisprobablybrokennow() ? //I'm lost in my own (awful) example by now.
//Not complete... or for average humans to read.
if(this != that) //Ternary would be done by now
{
x = this;
}
else
}
x = this + 2;
}
A really basic rule of thu...
How can I stop redis-server?
...6716] 02 Aug 15:48:44 * DB saved on disk
[6716] 02 Aug 15:48:44 # Redis is now ready to exit, bye bye...
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How to empty a list in C#?
...ds 5 equal answers?):
list.Add(5);
// list contains at least one element now
list = new List<int>();
// list in "list" is empty now
Keep in mind that all other references to the old list have not been cleared (depending on the situation, this might be what you want). Also, in terms of perf...
How to create SBT project with IntelliJ Idea?
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I retract my answer. This is a great plugin and I now use it every time.
– Synesso
Dec 6 '10 at 4:57
1
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Get timezone from DateTime
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DateTime itself contains no real timezone information. It may know if it's UTC or local, but not what local really means.
DateTimeOffset is somewhat better - that's basically a UTC time and an offset. However, that's still not really enough to determine the timezone, as many different t...
What is a 'Closure'?
...ery.js and take a look at the first line. You'll see a function is opened. Now skip to the end, you'll see window.jQuery = window.$ = jQuery. Then the function is closed and self executed. You now have access to the $ function, which in turn has access to the other functions defined in the closure. ...
What is the difference between self-types and trait subclasses?
...and Scala", you'll get many links, including presentations and videos. For now, here is a link to another question.
Now, as to what is the difference between a self type and extending a trait, that is simple. If you say B extends A, then B is an A. When you use self-types, B requires an A. There ar...
Constant pointer vs Pointer to constant [duplicate]
I want to know the difference between
8 Answers
8
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