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Writing a compiler in its own language
...nguage Foo. You use the first bootstrap compiler to compile the compiler, and then use this compiled compiler to compile everything else (including future versions of itself).
Most languages are indeed created in this fashion, partially because language designers like to use the language they are ...
How to use phpexcel to read data and insert into database?
...hp application where I want to read data from excel, Insert into database and then generate pdf reports for specific users.
I searched a lot but nothing specific given about both things.
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When to use a “has_many :through” relation in Rails?
I am trying to understand what has_many :through is and when to use it (and how). However, I am not getting it. I am reading Beginning Rails 3 and I tried Googling, but I am not able to understand.
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Canvas is stretched when using CSS but normal with “width” / “height” properties
I have 2 canvases, one uses HTML attributes width and height to size it, the other uses CSS:
8 Answers
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In STL maps, is it better to use map::insert than []?
...es in STL maps . I preferred map[key] = value; because it feels natural and is clear to read whereas he preferred map.insert(std::make_pair(key, value)) .
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How to get scrollbar position with Javascript?
...iew is. My guess is that I have to detect where the thumb on the track is, and then the height of the thumb as a percentage of the total height of the track. Am I over-complicating it, or does JavaScript offer an easier solution than that? Any ideas code-wise?
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Time complexity of Euclid's Algorithm
...ow what happens over two iterations:
a', b' := a % b, b % (a % b)
Now a and b will both decrease, instead of only one, which makes the analysis easier. You can divide it into cases:
Tiny A: 2a <= b
Tiny B: 2b <= a
Small A: 2a > b but a < b
Small B: 2b > a but b < a
Equal: a ==...
Java system properties and environment variables
What's the difference between system properties System.getProperties() and environment variables System.getenv() in a JVM?
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After array_filter(), how can I reset the keys to go in numerical order starting at 0
...d array_filter to remove entries that had only the value '' from an array, and now I want to apply certain transformations on it depending on the placeholder starting from 0, but unfortunately it still retains the original index. I looked for a while and couldn't see anything, perhaps I just missed...
horizontal line and right way to code it in html, css
I need to draw a horizontal line after some block, and I have three ways to do it:
10 Answers
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