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How can I build multiple submit buttons django form?
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You can use self.data in the clean_email method to access the POST data before validation. It should contain a key called newsletter_sub or newsletter_unsub depending on which button was pressed.
# in the context of a django.forms form
def clean(self):
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git still shows files as modified after adding to .gitignore
...ered Jun 7 '18 at 9:19
Sidhanshu_Sidhanshu_
84755 silver badges1010 bronze badges
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Take a screenshot of a webpage with JavaScript?
... to build the control in VB6 to take the screenshot. I had to use the keybd_event API call because SendKeys can't do PrintScreen. Here's the code for that:
Declare Sub keybd_event Lib "user32" _
(ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Long, ByVal dwExtraInfo As Long)
Public Const...
Java - sending HTTP parameters via POST method easily
...m3=c";
byte[] postData = urlParameters.getBytes( StandardCharsets.UTF_8 );
int postDataLength = postData.length;
String request = "http://example.com/index.php";
URL url = new URL( request );
HttpURLConnection conn= (HttpURLConnection) url.openConnection();
c...
How to calculate the CPU usage of a process by PID in Linux from C?
...rocess
pgrp pgrp of the process
sid session id
tty_nr tty the process uses
tty_pgrp pgrp of the tty
flags task flags
min_flt number of minor faults
cmin_flt number of minor faults with child's
maj_flt number of major faults
cm...
How can I copy the content of a branch to a new local branch?
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git checkout old_branch
git branch new_branch
This will give you a new branch "new_branch" with the same state as "old_branch".
This command can be combined to the following:
git checkout -b new_branch old_branch
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Applying function with multiple arguments to create a new pandas column
...f = pd.DataFrame({"A": [10,20,30], "B": [20, 30, 10]})
>>> df['new_column'] = np.multiply(df['A'], df['B'])
>>> df
A B new_column
0 10 20 200
1 20 30 600
2 30 10 300
or vectorize arbitrary function in general case:
>>> def fx(x, y):
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How do I pass command-line arguments to a WinForms application?
...the main function in programming as well:
http://en.wikipedia.org/wiki/Main_function_(programming)
Here is a little example for you:
class Program
{
static void Main(string[] args)
{
bool doSomething = false;
if (args.Length > 0 && args[0].Equals("doSomething"))...
What character to use to put an item at the end of an alphabetic list?
I often prepend ' _ ' to the item I want in first position.
Is there some sort of magical character I could use to put an item at the end of the list?
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A regex to match a substring that isn't followed by a certain other substring
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\w+ word characters (a-z, A-Z, 0-9, _) (1 or
more times (matching the most amount
possible))
--------------------------------------------------------------------------------
) en...