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How do you test a public/private DSA keypair?
...
261
I found a way that seems to work better for me:
ssh-keygen -y -f <private key file>
Tha...
How to generate a random number between a and b in Ruby?
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324
UPDATE: Ruby 1.9.3 Kernel#rand also accepts ranges
rand(a..b)
http://www.rubyinside.com/ru...
How to create a checkbox with a clickable label?
...ype="checkbox" name="checkbox" value="value">Text</label>
Method 2: Use the for Attribute
Use the for attribute (match the checkbox id):
<input type="checkbox" name="checkbox" id="checkbox_id" value="value">
<label for="checkbox_id">Text</label>
NOTE: ID must be unique o...
Error in : object of type 'closure' is not subsettable
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120
In general this error message means that you have tried to use indexing on a function. You can...
Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
...eated if it wasn't done that way.
This way you can write fast code using 32-bit values in 64-bit mode without having to explicitly break dependencies all the time. Without this behaviour, every single 32-bit instruction in 64-bit mode would have to wait on something that happened before, even thoug...
@UniqueConstraint annotation in Java
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427
To ensure a field value is unique you can write
@Column(unique=true)
String username;
The @U...
T-SQL stored procedure that accepts multiple Id values
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237
Erland Sommarskog has maintained the authoritative answer to this question for the last 16 yea...
Can I run multiple versions of Google Chrome on the same machine? (Mac or Windows)
...d Chrome-bin
directory. Now, you see chrome.exe and a dir like 18.0.1025.45.
Move chrome.exe to 18.0.1025.45, then move this directory to
C:\Chrome. The remaining files in Chrome-bin can safely be
deleted.
Create a shortcut for each version:
"C:\Chrome\18.0.1024.45\chrome.exe" --user-d...
Get the index of the nth occurrence of a string?
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52
That's basically what you need to do - or at least, it's the easiest solution. All you'd be "was...