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What's a good way to extend Error in JavaScript?
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Worth mentioning that this doesn't work if you are using ES6 features via a transpiler, such as Babel, since subclasses must extend a class.
– aaaidan
Jan 6 '16 at 1:01
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Can someone explain __all__ in Python?
...ll__ set in different __init__.py files. Can someone explain what this does?
11 Answers
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What's the difference between RSpec and Cucumber? [closed]
...e application in isolation from the rest of the application. So your model does what your model is supposed to do, the controller does what it is supposed to do, etc).
RSpec and Cucumber both are used for Acceptance Testing (Which is called ATDD, BDD, Specification by Example, etc depending on who ...
C++ Singleton design pattern
...the usual one. Just because beginners copy and paste code without thinking does not make it the usual one. You should always look at the use case and make sure the assignment operator does what is expected. Copy and pasting code is going to lead you into errors.
– Martin York
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How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?
...or is to not throw an error when the data is invalid. this accepted answer does NOT solve that. thanks Matthew! great work!
– Shawn Kovac
Aug 6 '14 at 23:36
3
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gitignore all files of extension in directory
... All files with the ending .meta should be ignored by git. How does this work? **.js ?
– Black
Nov 3 '17 at 21:00
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How can I check if a key exists in a dictionary? [duplicate]
...ot present
pass
If you want to retrieve a default value when the key does not exist, use
value = a.get(key, default_value).
If you want to set the default value at the same time in case the key does not exist, use
value = a.setdefault(key, default_value).
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Filter rows which contain a certain string
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note that this does not work when the object is a tbl_sql as grepl does not translate to sql.
– David LeBauer
Aug 11 '15 at 17:17
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Why is it wrong to use std::auto_ptr with standard containers?
...ed or copied and the two elements are logically independent. std::auto_ptr does not fulfill this requirement.
Take for example this code:
class X
{
};
std::vector<std::auto_ptr<X> > vecX;
vecX.push_back(new X);
std::auto_ptr<X> pX = vecX[0]; // vecX[0] is assigned NULL.
To o...
How to calculate md5 hash of a file using javascript
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@John Well, my statement does not rule this out. Client-side checks strictly are for user convenience (and thus more or less optional, depending on how convenient you want to make it). Server-side checks on the other hand are mandatory.
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