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Can I have multiple primary keys in a single table?
...width of our non-clustered leaf nodes, increasing storage requirements and read accesses for seeks and scans of that non-clustered index; and (2) reduces fan-out from our clustered index increasing index height and index size, again increasing reads and storage requirements for our clustered indexes...
echo that outputs to stderr
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You could do this, which facilitates reading:
>&2 echo "error"
>&2 copies file descriptor #2 to file descriptor #1. Therefore, after this redirection is performed, both file descriptors will refer to the same file: the one file descriptor #2 was...
Detect if value is number in MySQL
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@Richard- I just read the exceptions you gave. Thought you meant the character "e". I see what you mean now.
– Urbycoz
Feb 21 '11 at 12:53
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Setting up FTP on Amazon Cloud Server [closed]
... myself and wanted to expand on Jaminto's answer.
I'm assuming that you already have an EC2 instance created and have associated an Elastic IP Address to it.
Step #1: Install vsftpd
SSH to your EC2 server. Type:
> sudo yum install vsftpd
This should install vsftpd.
Step #2: Open up the ...
What's the difference between [ and [[ in Bash? [duplicate]
... will always appreciate clear code! Which script fragment would you rather read? Even out of context, the first choice is easier to read and understand.
if [[ -d $newDir && -n $(echo $newDir | grep "^${webRootParent}") && -n $(echo $newDir | grep '/$') ]]; then ...
or
if [ -d "...
SVN checkout ignore folder
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From reading that, it looks like sparse checkouts only limit the depth of a checkout. They can't ignore one particular folder.
– John Millikin
Oct 10 '08 at 20:04
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Creating a div element in jQuery [duplicate]
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You can read about it in the docs at api.jquery.com/jQuery/#jQuery2 (last paragraph of section)
– Gabriele Petrioli
Dec 2 '10 at 10:20
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What are the differences between B trees and B+ trees?
... the pointers in a single page of memory. We want to require only one disk read per leaf access, so we don't want to assign more than a page size of pointers to a leaf. If we fill a leaf with a page size of pointers, and then we want to add another pointer to this leaf, we create two children of thi...
How to turn NaN from parseInt into 0 for an empty string?
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@markzzz Read question again. OP asks: "Is it possible somehow to return 0 instead of NaN". OP don't want to check, whether particular string is parsable to int. OP wants to get 0 instead of NaN. This is solved by Matt's code perfectl...
Options for initializing a string array [duplicate]
...anced:
From a List
list<string> = new list<string>();
//... read this in from somewhere
string[] myString = list.ToArray();
From StringCollection
StringCollection sc = new StringCollection();
/// read in from file or something
string[] myString = sc.ToArray();
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