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What is the best method of handling currency/money?
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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...
Unable to execute dex: Multiple dex files define Lcom/myapp/R$array;
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How do I concatenate two arrays in C#?
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23 Answers
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Changing user agent on urllib2.urlopen
...I download a webpage with a user agent other than the default one on urllib2.urlopen?
9 Answers
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RegEx to parse or validate Base64 data
... words, you can use the following:
^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$
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Algorithm to get the excel-like column name of a number
... 1 == B, etc)...
function getNameFromNumber($num) {
$numeric = $num % 26;
$letter = chr(65 + $numeric);
$num2 = intval($num / 26);
if ($num2 > 0) {
return getNameFromNumber($num2 - 1) . $letter;
} else {
return $letter;
}
}
And if you want it one indexed...
Eclipse: Enable autocomplete / content assist
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edited Oct 20 '19 at 8:05
Saeed
2,16522 gold badges1818 silver badges3232 bronze badges
a...
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...
How to convert an array of strings to an array of floats in numpy?
...e's a better way. Use astype().
import numpy as np
x = np.array(['1.1', '2.2', '3.3'])
y = x.astype(np.float)
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Check for current Node Version
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206
Try to look at process.version property.
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