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Commenting multiple lines in DOS batch file
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You can use a goto to skip over code.
goto comment
...skip this...
:comment
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Meaning of numbers in “col-md-4”,“ col-xs-1”, “col-lg-2” in Bootstrap
I am confused with the grid system in the new Bootstrap, particularly these classes:
5 Answers
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Iteration over std::vector: unsigned vs signed index variable
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Iterating forwards is almost identical. Just change the iterators / swap decrement by increment. You should prefer iterators. Some people tell you to use std::size_t as the index variable type. However, that is not portable. Always use the size_type typedef of the container (While you could get ...
Socket.IO Authentication
...e the code, so I moved it here.
1: How to set up your Passport strategies: https://scotch.io/tutorials/easy-node-authentication-setup-and-local#handling-signupregistration
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How to combine two or more querysets in a Django view?
...th the the Q function you should be able to perform any OR query you need: https://docs.djangoproject.com/en/1.3/topics/db/queries/#complex-lookups-with-q-objects
– Josh Russo
Sep 18 '11 at 22:41
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Why dict.get(key) instead of dict[key]?
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It allows you to provide a default value if the key is missing:
dictionary.get("bogus", default_value)
returns default_value (whatever you choose it to be), whereas
dictionary["bogus"]
would raise a KeyError.
If omitted, default_valu...
Can't specify the 'async' modifier on the 'Main' method of a console app
...oint method will be translated to call GetAwaitor().GetResult().
Details: https://blogs.msdn.microsoft.com/mazhou/2017/05/30/c-7-series-part-2-async-main
EDIT:
To enable C# 7.1 language features, you need to right-click on the project and click "Properties" then go to the "Build" tab. There, clic...
How to find serial number of Android device?
I need to use a unique ID for an Android app and I thought the serial number for the device would be a good candidate. How do I retrieve the serial number of an Android device in my app ?
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How do you generate dynamic (parameterized) unit tests in python?
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This is called "parametrization".
There are several tools that support this approach. E.g.:
pytest's decorator
parameterized
The resulting code looks like this:
from parameterized import parameterized
class TestSequence(unittest.TestC...
Generate random password string with requirements in javascript
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Forcing a fixed number of characters is a bad idea. It doesn't improve the quality of the password. Worse, it reduces the number of possible passwords, so that hacking by bruteforcing becomes easier.
To generate a random word consisting of alphanumeric characters, use:
var randomstring =...