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Mercurial move changes to a new branch
...he comments to Mark's answer, moving around already pushed changesets generally is a bad idea, unless you work in a small team where you are able to communicate and enforce your history manipulation.
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What is the difference between and ?
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I really don't know what you mean. “In the site”: which site? “…to make it work”: what does ‘work’ mean? What's the intended rendering?
– Marcel Korpel
Jul 30 '10 at 11:19
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Libraries not found when using CocoaPods with iOS logic tests
...ething like:
link_with 'MainTarget', 'MainTargetTests'
Then run pod install again.
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Singleton: How should it be used
...rface widgets
It is supposed to be a cache
In strings
In Sessions
I can go all day long
How to create the best singleton:
The smaller, the better. I am a minimalist
Make sure it is thread safe
Make sure it is never null
Make sure it is created only once
Lazy or system initialization? Up to your re...
Browsers' default CSS for HTML elements
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A GitHub repository of all W3C HTML spec and vendor default CSS stylesheets can be found here
1. Default Styles for Firefox
2. Default Styles for Internet Explorer
3. Default Styles for Chrome / Webkit
4. Default Styles for Opera
5. Default St...
MongoDB: update every document on one field
I have a collected named foo hypothetically.
4 Answers
4
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How to avoid null checking in Java?
...ts they are participating in and defensively overcheck for nulls. Additionally, when writing their own code, they tend to rely on returning nulls to indicate something thus requiring the caller to check for nulls.
To put this another way, there are two instances where null checking comes up:
Whe...
How to get ID of the last updated row in MySQL?
...AT_WS(',', fooid, @uids) );
SELECT @uids;
This will return a string with all the IDs concatenated by a comma.
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Ways to iterate over a list in Java
...ng somewhat new to the Java language I'm trying to familiarize myself with all the ways (or at least the non-pathological ones) that one might iterate through a list (or perhaps other collections) and the advantages or disadvantages of each.
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What is recursion and when should I use it?
...sion.
To see why, walk through the steps that the above languages use to call a function:
space is carved out on the stack for the function's arguments and local variables
the function's arguments are copied into this new space
control jumps to the function
the function's code runs
the function's...