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How to count the number of set bits in a 32-bit integer?
8 bits representing the number 7 look like this:
55 Answers
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How to determine if a record is just created or updated in after_save
The #new_record? function determines if a record has been saved. But it is always false in the after_save hook. Is there a way to determine whether the record is a newly created record or an old one from update?
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How to read a file in Groovy into a string?
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edited Oct 16 '14 at 14:44
answered Oct 11 '11 at 16:28
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Why doesn't list have safe “get” method like dictionary?
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Ultimately it probably doesn't have a safe .get method because a dict is an associative collection (values are associated with names) where it is inefficient to check if a key is present (and return its value) without throwing an except...
How to create dictionary and add key–value pairs dynamically?
...needed to add more key/value pairs
Basically, you're creating an object literal with 2 properties (called key and value) and inserting it (using push()) into the array.
Edit: So almost 5 years later, this answer is getting downvotes because it's not creating an "normal" JS object literal (aka m...
Android Endless List
... where when you reach the end of the list I am notified so I can load more items?
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How accurate is python's time.sleep()?
I can give it floating point numbers, such as
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Variable is accessed within inner class. Needs to be declared final
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If you don't want to make it final, you can always just make it a global variable.
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Is an array name a pointer?
...contains space for seven integers, and you can put a value in one of them with an assignment, like this:
a[3] = 9;
Here is a pointer:
int *p;
p doesn't contain any spaces for integers, but it can point to a space for an integer. We can, for example, set it to point to one of the places in the ...
Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.10:test
...ays now looking for a fix to this issue, but I cannot seem to find and fix it on my own, mainly because I am so new to both Maven and PlayN so I'm not entirely sure at what I'm looking at exactly. But, it is clearly fizzing up at building the core. Seems it can't download an "artifact filter", and...