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Best database field type for a URL
I need to store a url in a MySQL table. What's the best practice for defining a field that will hold a URL with an undetermined length?
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Convert a number range to another range, maintaining ratio
...lue - OldMin) * NewRange) / OldRange) + NewMin
Or if you want to protect for the case where the old range is 0 (OldMin = OldMax):
OldRange = (OldMax - OldMin)
if (OldRange == 0)
NewValue = NewMin
else
{
NewRange = (NewMax - NewMin)
NewValue = (((OldValue - OldMin) * NewRange) / OldR...
Converting unix timestamp string to readable date
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.fromtimestamp() might fail for past dates if a local timezone had different utc offset. You need a historic timezone database such as provided by pytz module (or your OS). Or just work in UTC and use .utcfromtimestamp().
– jfs
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Why does Java switch on contiguous ints appear to run faster with added cases?
... case values are contiguous (as opposed to sparse), the generated bytecode for your various tests uses a switch table (bytecode instruction tableswitch).
However, once the JIT starts its job and compiles the bytecode into assembly, the tableswitch instruction does not always result in an array of p...
NumPy array initialization (fill with identical values)
...d np.full(), which is a more direct method than empty() followed by fill() for creating an array filled with a certain value:
>>> np.full((3, 5), 7)
array([[ 7., 7., 7., 7., 7.],
[ 7., 7., 7., 7., 7.],
[ 7., 7., 7., 7., 7.]])
>>> np.full((3, 5), 7, dtype...
An async/await example that causes a deadlock
I came across some best practices for asynchronous programming using c#'s async / await keywords (I'm new to c# 5.0).
5 A...
Representing Monetary Values in Java [closed]
I understand that BigDecimal is recommended best practice for representing monetary values in Java. What do you use? Is there a better library that you prefer to use instead?
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Is there a standard naming convention for git tags? [closed]
I've seen a lot of projects using v1.2.3 as the naming convention for tags in git. I've also seen some use 1.2.3 . Is there an officially endorsed style, or are there any good arguments for using either?
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How do I convert a String to an int in Java?
...entation you'll notice the "catch" is that this function can throw a NumberFormatException, which of course you have to handle:
int foo;
try {
foo = Integer.parseInt(myString);
}
catch (NumberFormatException e)
{
foo = 0;
}
(This treatment defaults a malformed number to 0, but you can do some...
Get JavaScript object from array of objects by value of property [duplicate]
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@thdoan The OP asked for "the object", not "an array of matching objects". elclanrs's answer is wrong.
– Michał Perłakowski
Apr 22 '18 at 21:29
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