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Extract a dplyr tbl column as a vector
...dplyr tbl as a vector, from a tbl with database back-end (i.e. the data frame/table can't be subset directly)?
7 Answers
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Attach parameter to button.addTarget action in Swift
I am trying to pass an extra parameter to the buttonClicked action, but cannot work out what the syntax should be in Swift.
...
What is an EJB, and what does it do?
Been trying to learn what EJB beans are, what does it mean their instances are managed in a pool, blah blah. Really can't get a good grip of them.
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When to choose checked and unchecked exceptions
...sed. The Java core API fails to follow these rules for SQLException (and sometimes for IOException) which is why they are so terrible.
Checked Exceptions should be used for predictable, but unpreventable errors that are reasonable to recover from.
Unchecked Exceptions should be used for everything...
What Makes a Good Unit Test? [closed]
... you are writing lots of automated tests and that you also have run into some common pitfalls when unit testing.
18 Answer...
How to get index of object by its property in JavaScript?
...eturn i;
}
}
return -1;
}
var Data = [
{id_list: 2, name: 'John', token: '123123'},
{id_list: 1, name: 'Nick', token: '312312'}
];
With this, not only can you find which one contains 'John' but you can find which contains the token '312312':
findWithAttr(Data, 'name', 'Jo...
How do I URL encode a string
...xed it yet, I have been using this category to url-encode a string:
@implementation NSString (NSString_Extended)
- (NSString *)urlencode {
NSMutableString *output = [NSMutableString string];
const unsigned char *source = (const unsigned char *)[self UTF8String];
int sourceLen = strlen(...
Calculate a MD5 hash from a string
... You should always say where you get code from if you copy/paste from somewhere, otherwise it is classed as plagiarism.
– DavidG
Dec 4 '15 at 11:45
1
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Passing data to Master Page in ASP.NET MVC
...w data:
public class IndexViewData : MasterViewData
{
public string Name { get; set; }
public float Price { get; set; }
}
Since I don't want individual controllers to know anything about putting together the master pages data I encapsulate that logic into a factory which is passed to each...
JavaScript implementation of Gzip [closed]
...//pieroxy.net/blog/pages/lz-string/index.html (Thanks to pieroxy in the comments).
I don't know of any gzip implementations, but the jsolait library (the site seems to have gone away) has functions for LZW compression/decompression. The code is covered under the LGPL.
// LZW-compress a string
fu...