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How to express a NOT IN query with ActiveRecord/Rails?
...s since it seems a lot of people come to this, if you are using Rails 4 look at the answers by Trung Lê` and VinniVidiVicci.
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Properties vs Methods
Quick question: When do you decide to use properties (in C#) and when do you decide to use methods?
16 Answers
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Proper way to use **kwargs in Python
What is the proper way to use **kwargs in Python when it comes to default values?
14 Answers
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Find out a Git branch creator
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A branch is nothing but a commit pointer. As such, it doesn't track metadata like "who created me." See for yourself. Try cat .git/refs/heads/<branch> in your repository.
That written, if you're really into tracking this information in your repository, check out branch descriptions. ...
How to replace an item in an array with Javascript?
...exOf(3452);
if (~index) {
items[index] = 1010;
}
Sometimes I even like to write a contains function to abstract this check and make it easier to understand what's going on. What's awesome is this works on arrays and strings both:
var contains = function (haystack, needle) {
return !!~hay...
Given a number, find the next higher number which has the exact same set of digits as the original n
...made pretty much zero progress on my interview question. Can anyone let me know how to do this? I tried searching online but couldn't find anything:
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How do I make a placeholder for a 'select' box?
I'm using placeholders for text inputs which is working out just fine. But I'd like to use a placeholder for my selectboxes as well. Of course I can just use this code:
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C# operator overload for `+=`?
I am trying to do operator overloads for += , but I can't. I can only make an operator overload for + .
10 Answers
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Compare object instances for equality by their attributes
...;>> x == y
True
Note that implementing __eq__ will automatically make instances of your class unhashable, which means they can't be stored in sets and dicts. If you're not modelling an immutable type (i.e. if the attributes foo and bar may change value within the lifetime of your object), th...
Is there a printf converter to print in binary format?
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Hacky but works for me:
#define BYTE_TO_BINARY_PATTERN "%c%c%c%c%c%c%c%c"
#define BYTE_TO_BINARY(byte) \
(byte & 0x80 ? '1' : '0'), \
(byte & 0x40 ? '1' : '0'), \
(byte & 0x20 ? '1' : '0'), \
(byte & 0x...