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Checking if a variable is not nil and not zero in ruby
...h is a much lighter and widely used dependency than the full rails. Anyway now @ndn's response is the right one.
– rewritten
Jun 7 '17 at 19:42
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TypeError: unhashable type: 'dict'
...ntation of it like this:
>>> key = frozenset(dict_key.items())
Now you may use key as a key in a dict or set:
>>> some_dict[key] = True
>>> some_dict
{frozenset([('a', 'b')]): True}
Of course you need to repeat the exercise whenever you want to look up something usin...
Using CookieContainer with WebClient class
...ed a CookieContainer with HttpWebRequest and HttpWebResponse sessions, but now, I want to use it with a WebClient. As far as I understand, there is no built-in method like there is for HttpWebRequests ( request.CookieContainer ). How can I collect cookies from a WebClient in a CookieContainer?
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Copy rows from one Datatable to another DataTable?
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Supported in: 4, 3.5 SP1, you can now just call a method on the object.
DataTable dataTable2 = dataTable1.Copy()
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How to install trusted CA certificate on Android device?
I have created my own CA certificate and now I want to install it on my Android Froyo device (HTC Desire Z), so that the device trusts my certificate.
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Does a javascript if statement with multiple conditions test all of them?
...bles, each function may take a long time, and not only is it important to know this short circuits, but in what order. For example:
if (takesSeconds() && takesMinutes())
is much better than
if (takesMinutes() && takesSeconds())
if both are equally likely to return false.
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Detect enter press in JTextField
...d textField = new JTextField(10);
textField.addActionListener( action );
Now the event is fired when the Enter key is used.
Also, an added benefit is that you can share the listener with a button even if you don't want to make the button a default button.
JButton button = new JButton("Do Someth...
How to change Git log date formats
... (either committer’s or author’s).
There is no built-in way that I know of to create a custom format, but you can do some shell magic.
timestamp=`git log -n1 --format="%at"`
my_date=`perl -e "print scalar localtime ($timestamp)"`
git log -n1 --pretty=format:"Blah-blah $my_date"
The first s...
What is your preferred php deployment strategy? [closed]
...se branches for nearly every change I'm working on (I've got about 5 right now), and tend to flip back and forth between them. The master branch doesn't get changed directly except for merging other branches.
I run the live server direct from the master branch, and when I'm finished with another br...
What is a difference between
... arrays are what we call reifiable types. This means that at runtime Java knows that this array was actually instantiated as an array of integers which simply happens to be accessed through a reference of type Number[].
So, as you can see, one thing is the actual type of the object, and another thin...