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What is a Portable Class Library?
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84
UPDATE Oct 9 2017: Article comparing/constrasting .NET Core/Std/PCL
UPDATE Nov 23 2016: Article...
How to create a unique index on a NULL column?
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84
create unique index UIX on MyTable (Column1) where Column1 is not null
– Jørn Schou-Rode
Dec 2 '10 ...
When do I use the PHP constant “PHP_EOL”?
...uses "\n". Someone should file a bug report...
– imgx64
Jan 28 '12 at 7:32
28
@imgx64 Yeah maybe,...
Do you use NULL or 0 (zero) for pointers in C++?
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cerr << sizeof(void*) << endl;
============
On a 64-bit gcc RHEL platform you get:
4
8
8
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The moral of the story. You should use NULL when you're dealing with pointers.
1) It declares your intent (don't make me search through all your cod...
Why is auto_ptr being deprecated?
...r unique_ptr usage) , can you suggest what was intended in those remaining 96.8584073465% of all usage?
– Marc van Leeuwen
Jun 19 '14 at 4:49
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byte + byte = int… why?
... With ints it does overflow. Try adding int.MaxValue + 1 you get -2147483648 instead of 2147483648.
– David Basarab
Jun 2 '09 at 20:13
8
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jQuery: Return data after ajax call success [duplicate]
...9
rsprsp
84.9k1717 gold badges162162 silver badges146146 bronze badges
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JRE 1.7 - java version - returns: java/lang/NoClassDefFoundError: java/lang/Object
...ultiplyByZer0
3,73333 gold badges2727 silver badges4646 bronze badges
answered Jan 23 '13 at 12:51
Rigg802Rigg802
2,61611 gold bad...
Multiple github accounts on the same computer?
... – here I'll name the new key github-otheruser
$ ssh-keygen -t rsa -b 4096 -f ~/.ssh/github-otheruser
Now, when we look at tree ~/.ssh we see
$ tree ~/.ssh
/Users/you/.ssh
├── known_hosts
├── github-mainuser
├── github-mainuser.pub
├── github-otheruser
└── github-...
How do you detect Credit card type based on number?
...at you make the field wide enough to display 32 characters and allow up to 64; that gives plenty of headroom for expansion.
Here's an image that gives a little more insight:
UPDATE (2014): The checksum method no longer appears to be a valid way of verifying a card's authenticity as noted in the co...