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How do I delete unpushed git commits?
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Delete the most recent commit, keeping the work you've done:
git reset --soft HEAD~1
Delete the most recent commit, destroying the work you've done:
git reset --hard HEAD~1
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Difference between JSONObject and JSONArray
After having a short look at Google I found this link that describes the difference, yet from a syntax point of view.
8 A...
Cosmic Rays: what is the probability they will affect a program?
...uggest that computers typically experience about one cosmic-ray-induced error per 256 megabytes of RAM per month.[15]
This means a probability of 3.7 × 10-9 per byte per month, or 1.4 × 10-15 per byte per second. If your program runs for 1 minute and occupies 20 MB of RAM, then the failure proba...
When is it appropriate to use C# partial classes?
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The biggest use of partial classes is to make life easier for code generators / designers. Partial classes allow the generator to simply emit the code they need to emit and they do not have to deal with user edits to the file. Users are likewise free to annotate the class with new m...
Tactics for using PHP in a high-load site
Before you answer this I have never developed anything popular enough to attain high server loads. Treat me as (sigh) an alien that has just landed on the planet, albeit one that knows PHP and a few optimisation techniques.
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How does a debugger work?
I keep wondering how does a debugger work? Particulary the one that can be 'attached' to already running executable. I understand that compiler translates code to machine language, but then how does debugger 'know' what it is being attached to?
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How do I interpret precision and scale of a number in a database?
...al places
ie 123456.789 has a scale of 3
Thus the maximum allowed value for decimal(5,2) is 999.99
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How to source virtualenv activate in a Bash script
...o that shell which exits when your script finishes and you're back to your original, unactivated shell.
Your best option would be to do it in a function
activate () {
. ../.env/bin/activate
}
or an alias
alias activate=". ../.env/bin/activate"
Hope this helps.
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Difference between “managed” and “unmanaged”
I hear/read about it sometimes when talking about .NET, for example "managed code" and "unmanaged code" but I have no idea what they are and what are their differences. What are their difference, by definition? What are the consequences of using either of them? Does this distinction exist in .NET/Wi...
How can I check for an empty/undefined/null string in JavaScript?
...pecific example. Is there a simple string.Empty available in JavaScript, or is it just a case of checking for "" ?
47 An...