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Difference between len() and .__len__()?
...y calling an object's __len__ method. __something__ attributes are special and usually more than meets the eye, and generally should not be called directly.
It was decided at some point long ago getting the length of something should be a function and not a method code, reasoning that len(a)'s mean...
No Multiline Lambda in Python: Why not?
...r syntax constructs in Python. I was thinking about this on the bus today and realized I couldn't think of a single Python construct that multiline lambdas clash with. Given that I know the language pretty well, this surprised me.
...
Should switch statements always contain a default clause?
...pe! based on the language,
// there should probably be some error-handling
// here, maybe an exception
}
2. To handle 'default' actions, where the cases are for special behavior.
You see this a LOT in menu-driven programs and bash shell scripts. You might also see this when a vari...
Remove insignificant trailing zeros from a number?
Have I missed a standard API call that removes trailing insignificant zeros from a number?
15 Answers
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What is the difference between require and require-dev sections in composer.json?
I'm beginning using composer, I know so little about it and have a little experience with web application development.
6 An...
How can you dynamically create variables via a while loop? [duplicate]
...ould just use a dictionary, where you can dynamically create the key names and associate a value to each.
a = {}
k = 0
while k < 10:
<dynamically create key>
key = ...
<calculate value>
value = ...
a[key] = value
k += 1
There are also some interesting dat...
How to exit from Python without traceback?
...
You are presumably encountering an exception and the program is exiting because of this (with a traceback). The first thing to do therefore is to catch that exception, before exiting cleanly (maybe with a message, example given).
Try something like this in your main r...
Basic HTTP authentication with Node and Express 4
...n: 'yourlogin', password: 'yourpassword'} // change this
// parse login and password from headers
const b64auth = (req.headers.authorization || '').split(' ')[1] || ''
const [login, password] = Buffer.from(b64auth, 'base64').toString().split(':')
// Verify login and password are set and co...
HTML colspan in CSS
...ing absolute positioning, sizing, along with a similar variety of browser- and circumstance-specific caveats. Read, and make the best informed decision you can based on what you find.
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impro...
Find size of an array in Perl
...
The first and third ways are the same: they evaluate an array in scalar context. I would consider this to be the standard way to get an array's size.
The second way actually returns the last index of the array, which is not (usually) ...