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Why are Where and Select outperforming just Select?
...an be different from cost(+), they don't necessarily intersect at p(valid)=0.5.
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How is this fibonacci-function memoized?
... and kept ready in case it is asked for again. If we define some list, xs=[0..] and later ask for its 100th element, xs!!99, the 100th slot in the list gets "fleshed out", holding the number 99 now, ready for next access.
That is what that trick, "going-through-a-list", is exploiting. In normal do...
Convert DataFrame column type from string to datetime, dd/mm/yyyy format
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504
The easiest way is to use to_datetime:
df['col'] = pd.to_datetime(df['col'])
It also offers ...
Can jQuery get all CSS styles associated with an element?
...r (var i in css) {
var l = css[i].split(": ");
s[l[0].toLowerCase()] = (l[1]);
}
}
return s;
}
Pass a jQuery object into css() and it will return an object, which you can then plug back into jQuery's $().css(), ex:
var style = css($("#elementToGetAllCSS"));...
How can you encode a string to Base64 in JavaScript?
... character represents an 8-bit byte – that is, its value will be between 0 and 0xff. This does not mean it’s ASCII – presumably if you’re using this function at all, you expect to be working with binary data and not text.
See also:
How do I load binary image data using Javascript and XML...
How to properly check if std::function is empty in C++11?
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105
You're not checking for an empty lambda, but whether the std::function has a callable target st...
Display number with leading zeros
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1150
In Python 2 (and Python 3) you can do:
print "%02d" % (1,)
Basically % is like printf or spri...
Produce a random number in a range using C#
...
You can try
Random r = new Random();
int rInt = r.Next(0, 100); //for ints
int range = 100;
double rDouble = r.NextDouble()* range; //for doubles
Have a look at
Random Class, Random.Next Method (Int32, Int32) and Random.NextDouble Method
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How to find out if an installed Eclipse is 32 or 64 bit version?
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210
Hit Ctrl+Alt+Del to open the Windows Task manager and switch to the processes tab.
32-bit progr...
How to change position of Toast in Android?
...can set the gravity like this:
toast.setGravity(Gravity.TOP|Gravity.LEFT, 0, 0);
If you want to nudge the position to the right, increase the value of
the second parameter. To nudge it down, increase the value of the last
parameter.
...