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What's the difference between Sender, From and Return-Path?
...erent from the actual data of the message.
The Sender header is used to identify in the message who submitted it. This is usually the same as the From header, which is who the message is from. However, it can differ in some cases where a mail agent is sending messages on behalf of someone else....
What is the difference between ${var}, “$var”, and “${var}” in the Bash shell?
...forms can get hard to read (and therefore hard to maintain). This page provides a good introduction to quoting in Bash.
Arrays ($var vs. $var[@] vs. ${var[@]})
Now for your array. According to the bash manual:
Referencing an array variable without a subscript is equivalent to referencing the a...
ctypes - Beginner
...Here's a simple Hello world example:
testlib.c
#include <stdio.h>
void myprint(void);
void myprint()
{
printf("hello world\n");
}
Now compile it as a shared library (mac fix found here):
$ gcc -shared -Wl,-soname,testlib -o testlib.so -fPIC testlib.c
# or... for Mac OS X
$ gcc -shared...
NSObject +load and +initialize - What do they do?
... interested in understanding the circumstances leading a developer to override +initialize or +load. Documentation makes it clear these methods are called for you by the Objective-C runtime, but that's really all that is clear from the documentation of those methods. :-)
...
In git, is there a way to show untracked stashed files without applying the stash?
If I run git stash -u , I can stash untracked files. However, said untracked files don't show up at all with git stash show stash@{0} . Is there any way to show untracked stashed files without applying the stash?
...
What's the difference between IEquatable and just overriding Object.Equals()?
...ntains() method. Should I implement IEquatable<Food> or just override Object.Equals() ? From MSDN:
4 Answers
...
how to set “camera position” for 3d plots using python/matplotlib?
...t3d.proj3d but I could not find out how to use these for my purpose and I didn't find any example for what I'm trying to do.
...
Entity Framework DateTime and UTC
...
Here is one approach you might consider:
First, define this following attribute:
[AttributeUsage(AttributeTargets.Property)]
public class DateTimeKindAttribute : Attribute
{
private readonly DateTimeKind _kind;
public DateTimeKindAttribute(DateTimeK...
Preferred way of loading resources in Java
... this refers to an instance of SubClass" if we are executing statements inside instance method of super class then "this" will refer to the superclass not the subclass.
– Dead Programmer
Oct 5 '10 at 8:55
...
Why not abstract fields?
...int in that. You can move the function to the abstract class and just override some protected field. I don't know if this works with constants but the effect is the same:
public abstract class Abstract {
protected String errorMsg = "";
public String getErrMsg() {
return this.errorM...