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Returning a C string from a function
I am trying to return a C string from a function, but it's not working. Here is my code.
14 Answers
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Restore file from old commit in git
...ld commit that I did a few weeks ago. I want to restore only a single file from that commit. What do I do?
4 Answers
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How do you implement a Stack and a Queue in JavaScript?
....shift(); // queue is now [5]
alert(i); // displays 2
taken from "9 javascript tips you may not know"
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How to subtract X day from a Date object in Java?
...ateTime.ofInstant(in.toInstant(), ZoneId.systemDefault());
Date out = Date.from(ldt.atZone(ZoneId.systemDefault()).toInstant());
Java 7 and earlier
Use Calendar's add() method
Calendar cal = Calendar.getInstance();
cal.setTime(dateInstance);
cal.add(Calendar.DATE, -30);
Date dateBefore30Days = c...
Example images for code and mark-up Q&As [closed]
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Here are some example images for common use, mostly from existing answers on SO.
Icons
Simple Geometric shapes generated using Java as originally seen in this answer. It includes a Java based interface that defines the URLs and makes them easy to access.
Details: 32x32 p...
Programmatically saving image to Django ImageField
...s an image off the web and stores it in a model. The important bits are:
from django.core.files import File # you need this somewhere
import urllib
# The following actually resides in a method of my model
result = urllib.urlretrieve(image_url) # image_url is a URL to an image
# self.photo is ...
Vagrant reverse port forwarding?
...ide the guest machine, and the last two are the service address as visible from the host machine.
– Eero
May 13 '13 at 12:33
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Convert any object to a byte[]
...aged memory.
Marshal.StructureToPtr(your_object, ptr, false);
// Copy data from unmanaged memory to managed buffer.
Marshal.Copy(ptr, bytes, 0, size);
// Release unmanaged memory.
Marshal.FreeHGlobal(ptr);
And to convert bytes to object:
var bytes = new byte[size];
var ptr = Marshal.AllocHGlobal(...
Can Json.NET serialize / deserialize to / from a stream?
...ed answer code. A current alternative is:
public static object DeserializeFromStream(Stream stream)
{
var serializer = new JsonSerializer();
using (var sr = new StreamReader(stream))
using (var jsonTextReader = new JsonTextReader(sr))
{
return serializer.Deserialize(jsonTex...
what is the difference between ?:, ?! and ?= in regex?
..."ab".
The difference between ?: and ?= is that ?= excludes the expression from the entire match while ?: just doesn't create a capturing group. So for example a(?:b) will match the "ab" in "abc", while a(?=b) will only match the "a" in "abc". a(b) would match the "ab" in "abc" and create a capture ...