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What is the best method of handling currency/money?
...oint
add_column :items, :price, :decimal, :precision => 8, :scale => 2
In Rails, the :decimal type is returned as BigDecimal, which is great for price calculation.
If you insist on using integers, you will have to manually convert to and from BigDecimals everywhere, which will probably just...
RegEx to parse or validate Base64 data
... words, you can use the following:
^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$
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How to concatenate items in a list to a single string?
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edited Sep 17 '12 at 5:48
answered Sep 17 '12 at 5:33
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What is the difference between Θ(n) and O(n)?
... Ω(g(x))
Basically when we say an algorithm is of O(n), it's also O(n2), O(n1000000), O(2n), ... but a Θ(n) algorithm is not Θ(n2).
In fact, since f(n) = Θ(g(n)) means for sufficiently large values of n, f(n) can be bound within c1g(n) and c2g(n) for some values of c1 and c2, i.e. the grow...
Get Substring - everything before certain char
...ram
{
static void Main(string[] args)
{
Console.WriteLine("223232-1.jpg".GetUntilOrEmpty());
Console.WriteLine("443-2.jpg".GetUntilOrEmpty());
Console.WriteLine("34443553-5.jpg".GetUntilOrEmpty());
Console.ReadKey();
}
}
static class Helper
{
public ...
What does [object Object] mean?
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edited Dec 15 '19 at 22:28
Samir
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answered Jan ...
Why start an ArrayList with an initial capacity?
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edited Mar 15 '13 at 16:22
answered Mar 15 '13 at 10:41
N...
How do I parse XML in Python?
...9
Mig B
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answered Dec 16 '09 at 5:21
Alex MartelliAlex Marte...
How to crop circular area from bitmap in Android
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217
After long brainstorming I have found the solution
public Bitmap getCroppedBitmap(Bitmap bitm...