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Setting the selected value on a Django forms.ChoiceField
...ed to trying to assign the selected value to a ChoiceField.
If you have already called super().__init__ in your Form class, you should update the form.initial dictionary, not the field.initial property. If you study form.initial (e.g. print self.initial after the call to super().__init__), it will...
Converting XDocument to XmlDocument and vice versa
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You can use the built in xDocument.CreateReader() and an XmlNodeReader to convert back and forth.
Putting that into an Extension method to make it easier to work with.
using System;
using System.Xml;
using System.Xml.Linq;
namespace MyTest
{
internal class Pr...
Iterate all files in a directory using a 'for' loop
...vely), you can do it like this: for /r %i in (*) do ( echo %~nxi ). This thread can be really useful too: stackoverflow.com/questions/112055/….
– Sk8erPeter
Dec 21 '11 at 21:25
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Create an Array of Arraylists
... @smsIce: It is not a bad design. The Problem is, that many writers don't read the full question or understand it clearly.
– testo
Aug 25 '15 at 7:50
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How do I determine the current operating system with Node.js
...lease()); // "10.0.14393"
console.log(os.platform()); // "win32"
You can read it's full documentation here: https://nodejs.org/api/os.html#os_os_type
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How to delete a whole folder and content?
...e : fileOrDirectory.listFiles() may return null if there is I/O error when reading the files. This is stated clearly in the documentation : developer.android.com/reference/java/io/File.html#listFiles()
– Brian Yencho
Mar 6 '18 at 15:51
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How to clear a chart from a canvas so that hover events cannot be triggered?
... solution worked for me many thanks, but for the width and height if you already set them fixed you should reset them to the same value in the reset function
– Sandy Elkassar
Aug 26 '19 at 23:10
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Find a class somewhere inside dozens of JAR files?
...
A syntax variation:
find path/to/libs -name '*.jar' -print | \
while read i; do jar -tvf "$i" | grep -Hsi ClassName && echo "$i"; done
Windows
Open a command prompt, change to the directory (or ancestor directory) containing the JAR files, then:
for /R %G in (*.jar) do @jar -tvf "...
Create a string with n characters
...t over and over again during the course of your programming career.
People reading your code - that includes you - always have to invest time, even if it are just some seconds, to digest the meaning of the loop.
Instead reuse one of the available libraries providing code that does just that like St...
How do I register a DLL file on Windows 7 64-bit?
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If you have already copied the filename.dll to the syswow64 folder, and you change working directory to syswow64 in command prompt, then the "c:\" in "regsvr32 c:\filename.dll" is not necessary. In short, "regsvr32 c:\filename.dll" should ...