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Understanding exactly when a data.table is a reference to (vs a copy of) another data.table
...erations seem to 'break' the reference, and I'd like to understand exactly what's happening.
2 Answers
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Why use apparently meaningless do-while and if-else statements in macros?
In many C/C++ macros I'm seeing the code of the macro wrapped in what seems like a meaningless do while loop. Here are examples.
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Laravel Eloquent: How to get only certain columns from joined tables
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Change your model to specify what columns you want selected:
public function user() {
return $this->belongs_to('User')->select(array('id', 'username'));
}
And don't forget to include the column you're joining on.
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How to convert C# nullable int to int
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Is default(int) really needed? What's wrong with a simple 0?
– Cole Johnson
Mar 20 '15 at 23:07
5
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jQuery Ajax error handling, show custom exception messages
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This is what I did and it works so far in a MVC 5 application.
Controller's return type is ContentResult.
public ContentResult DoSomething()
{
if(somethingIsTrue)
{
Response.StatusCode = 500 //Anything other than 2...
Prevent automatic browser scroll on refresh
...round. Is there any way to prevent this with javascript? So that no-matter-what you would always navigate to the anchor.
8 ...
Is there a documented way to set the iPhone orientation?
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From what I can tell, the setOrientation: method doesn't work (or perhaps works no longer). Here's what I'm doing to do this:
first, put this define at the top of your file, right under your #imports:
#define degreesToRadian(x)...
Mercurial: how to amend the last commit?
...eally familiar with the git commit --amend command, but AFAIK, Histedit is what seems to be the closest approach, but sadly it isn't shipped with Mercurial. MQ is really complicated to use, but you can do nearly anything with it.
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Are 2^n and n*2^n in the same time complexity?
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Stupid question, what is lg? Logarithm in base 2?
– Pierre Arlaud
Feb 14 '14 at 12:57
3
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Representational state transfer (REST) and Simple Object Access Protocol (SOAP)
Can somebody explain what is REST and what is SOAP in plain english? And how Web Services work?
14 Answers
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