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“new” keyword in Scala
...fferent things
> println(new Foo)
test@5c79cc94
> println(Foo())
7
And, since you mentioned Java classes: yes -- Java classes rarely have
companion objects with an apply method, so you must use new and the actual
class's constructor.
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Immediate function invocation syntax
...at it is clear that the value being produced is the result of the function and not the function itself.
So, basically, he feels it makes more clear the distinction between function values, and the values of functions. So, it's an stylistic matter, not really a substantive difference in the code its...
LINQ: “contains” and a Lambda query
...e. I keep wondering why on Earth Linq doesn't provide a Contains() method, and then I realize it's supposed to be Any() instead. +1
– Nolonar
Aug 18 '15 at 11:39
add a comment...
How to add an empty column to a dataframe?
What's the easiest way to add an empty column to a pandas DataFrame object? The best I've stumbled upon is something like
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How do I check whether a jQuery element is in the DOM?
... There is a pure-DOM way to do this, which is syntactically more readable, and I imagine very similar in terms of performance: document.contains($foo[0])
– Joel Cross
Dec 1 '15 at 10:16
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Change values while iterating
... prints you completely different memory locations for the value from range and the actual
value in the slice:
0xf84000f010 vs. 0x7f095ed0bf68
0xf84000f014 vs. 0x7f095ed0bf68
0xf84000f018 vs. 0x7f095ed0bf68
So the only thing you can do is to either use pointers or the index, as already proposed ...
Custom toast on Android: a simple example
I'm new to Android programming. What is a simple example showing a custom toast notification on Android?
17 Answers
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What will happen if I modify a Python script while it's running?
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Nothing, because Python precompiles your script into a PYC file and launches that.
However, if some kind of exception occurs, you may get a slightly misleading explanation, because line X may have different code than before you started the script.
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What's the $unwind operator in MongoDB?
...om your mind. The way that it stores your data is in the form of documents and collections, which allows for a dynamic means of adding and obtaining the data from your storage locations.
That being said, in order to understand the concept behind the $unwind parameter, you first must understand what...
clang: how to list supported target architectures?
Currently I am interested in ARM in general and specifically iphone/android targets. But I just want to know more about clang, since it feels to play important role in the years to come.
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