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Any reason to prefer getClass() over instanceof when generating .equals()?
....hashCode() , and there is an option labeled "Use 'instanceof' to compare types". The default is for this option to be unchecked and use .getClass() to compare types. Is there any reason I should prefer .getClass() over instanceof ?
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UITableView load more when scrolling to bottom like Facebook application
...o show a list of users (UITableView) using a paginating mechanism. Could any one please tell me how to load more data in my list when the user scrolls to the end of the list (like on home page on Facebook application)?
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Efficient evaluation of a function at every cell of a NumPy array
Given a NumPy array A , what is the fastest/most efficient way to apply the same function, f , to every cell?
6 Ans...
JavaScript checking for null vs. undefined and difference between == and ===
...te the latter will also be true if a is undefined.
Is it undefined:
if (typeof a === "undefined")
// or
if (a === undefined)
// or
if (a == undefined) // but see note below
...but again, note that the last one is vague; it will also be true if a is null.
Now, despite the above, the usual way t...
How to group dataframe rows into list in pandas groupby?
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You can do this using groupby to group on the column of interest and then apply list to every group:
In [1]: df = pd.DataFrame( {'a':['A','A','B','B','B','C'], 'b':[1,2,5,5,4,6]})
df
Out[1]:
a b
0 A 1
1 A 2...
How to configure IntelliJ (also Android Studio) redo shortcut to CTRL+Y instead of CTRL+SHIFT+Z?
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Open Settings (press CTRL+ALT+S)
Click Keymap on the left list.
There is a combobox that contains keymaps. Select one of them (default means IntelliJ of course. We can't change any of pre-defined keymap however we can copy, edit and then use the edited one. So) we s...
How to write trycatch in R
I want to write trycatch code to deal with error in downloading from the web.
5 Answers
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Difference between int[] array and int array[]
I have recently been thinking about the difference between the two ways of defining an array:
25 Answers
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Iterate two Lists or Arrays with one ForEach statement in C#
...s is known as a Zip operation and will be supported in .NET 4.
With that, you would be able to write something like:
var numbers = new [] { 1, 2, 3, 4 };
var words = new [] { "one", "two", "three", "four" };
var numbersAndWords = numbers.Zip(words, (n, w) => new { Number = n, Word = w });
fore...
How to get different colored lines for different plots in a single figure?
I am using matplotlib to create the plots. I have to identify each plot with a different color which should be automatically generated by Python.
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