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Determine Whether Integer Is Between Two Other Integers?
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Paolo MorettiPaolo Moretti
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How can I pad a value with leading zeros?
...pt 3.1. Example:
var n=-0.1;
n.toLocaleString('en', {minimumIntegerDigits:4,minimumFractionDigits:2,useGrouping:false})
...will output "-0000.10".
// or
const padded = (.1+"").padStart(6,"0");
`-${padded}`
...will output "-0000.1".
A simple function is all you need
function zeroFil...
Ways to save enums in database
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164
We never store enumerations as numerical ordinal values anymore; it makes debugging and support ...
Pythonic way to combine FOR loop and IF statement
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340
You can use generator expressions like this:
gen = (x for x in xyz if x not in a)
for x in ge...
Why use a prime number in hashCode?
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104
Because you want the number you are multiplying by and the number of buckets you are inserting i...
What is the use of the ArraySegment class?
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ArraySegment<T> has become a lot more useful in .NET 4.5+ and .NET Core as it now implements:
IList<T>
ICollection<T>
IEnumerable<T>
IEnumerable
IReadOnlyList<T>
IReadOnlyCollection<T>
as opposed to the .NET 4 version which implemented no inter...
How does java do modulus calculations with negative numbers?
Am I doing modulus wrong? Because in Java -13 % 64 is supposed to evaluate to -13 but I get 51 .
14 Answers
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Is there a performance difference between a for loop and a for-each loop?
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From Item 46 in Effective Java by Joshua Bloch :
The for-each loop, introduced in
release 1.5, gets rid of the clutter
and the opportunity for error by
hiding the iterator or index variable
completely. The resulting idiom
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How to properly assert that an exception gets raised in pytest?
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platform linux2 -- Python 2.7.6 -- py-1.4.26 -- pytest-2.6.4
collected 7 items
test.py ..FF..F
=================================================================================================== FAILURES ==========================================================...
Why are Python lambdas useful? [closed]
...ions to do stuff. Example:
mult3 = filter(lambda x: x % 3 == 0, [1, 2, 3, 4, 5, 6, 7, 8, 9])
sets mult3 to [3, 6, 9], those elements of the original list that are multiples of 3. This is shorter (and, one could argue, clearer) than
def filterfunc(x):
return x % 3 == 0
mult3 = filter(filterfu...