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What’s the purpose of prototype? [duplicate]
...-created each time; it exists in one place in the prototype. So when you call someAnimal.set_name("Ubu"); the this context will be set to someAnimal and (the one and only) set_name function will be called.
There is one advantage to using the first syntax though: functions created in this manner...
How to calculate the intersection of two sets? [duplicate]
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Use the retainAll() method of Set:
Set<String> s1;
Set<String> s2;
s1.retainAll(s2); // s1 now contains only elements in both sets
If you want to preserve the sets, create a new set to hold the intersection:
Set<String&g...
Why doesn't calling a Python string method do anything unless you assign its output?
... line:
X = X.replace("hello", "goodbye")
More broadly, this is true for all Python string methods that change a string's content "in-place", e.g. replace,strip,translate,lower/upper,join,...
You must assign their output to something if you want to use it and not throw it away, e.g.
X = X.strip...
backbone.js & underscore.js CDN recommendation?
...some more cdnjs stats and users: w3techs.com/technologies/details/cd-cdnjs/all/all
– Ryan Kirkman
May 8 '13 at 5:10
10
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How to set .net Framework 4.5 version in IIS 7 application pool
I installed the Visual Studio 11 Beta and suddenly all the async action methods I had created under the VS 11 Developer preview started hanging (apparently this issue: http://blogs.msdn.com/b/pfxteam/archive/2012/03/03/10277166.aspx ).
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GUI Tool for PostgreSQL [closed]
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Perhaps "obtuse" would've been a better term! Functionally, it does seem fine.
– CorayThan
Oct 21 '14 at 19:30
6
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New transaction is not allowed because there are other threads running in the session LINQ To Entity
... ToList method to realise the enumerator into a collection. That will read all items from the enumerator and close the connection to the source, so that you can use the connection for other things.
foreach (var p in pp.ToList())
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How do I write a Python dictionary to a csv file? [duplicate]
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Small addition: You can easily print a subset of a dict by using csv.DictWriter(f, ["testing"], extrasaction='ignore')
– Dawodo
Sep 19 '16 at 16:55
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Double negation (!!) in javascript - what is the purpose? [duplicate]
...ue
null to true
+0 to true
-0 to true
'' to true
NaN to true
false to true
All other expressions to false
Then the other ! negates it again. A concise cast to boolean, exactly equivalent to ToBoolean simply because ! is defined as its negation. It’s unnecessary here, though, because it’s only ...
How to upgrade R in ubuntu? [closed]
I have R 2.12.1 installed in my ubuntu, and I'd like upgrade to lastest version 2.15, how can achieve that ? Thanks
1 Answ...