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How to Sort a List by a property in the object
...and should be much more efficient than creating a new IEnumerable and then converting it to a new list.
– Jonathan Wood
Dec 30 '15 at 17:11
51
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Function for Factorial in Python
...ction will raise a DeprecationWarning. If you want to do that, you need to convert n to an int explicitly: math.factorial(int(n)), which will discard anything after the decimal, so you might want to check that n.is_integer()
– Boris
Nov 22 '19 at 11:47
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Fastest sort of fixed length 6 int array
...n's SWAP macro. Update: I switched to Paolo Bonzini's SWAP macro which gcc converts into something similar to Gunderson's, but gcc is able to better order the instructions since they aren't given as explicit assembly.
I used the same swap order as the reordered swap network given as the best perfor...
How to negate a method reference predicate
...ows how by explicitly casting the method reference to a Predicate and then converting it using the negate function. That is one way among a few other not too troublesome ways to do it.
The opposite of this:
Stream<String> s = ...;
int emptyStrings = s.filter(String::isEmpty).count();
is th...
What's the best way to get the last element of an array without deleting it?
...st a day, so if I need to do it again I will probably write something that converts the output of all 210 docker executions to a table automatically :-)
– Paul van Leeuwen
Sep 29 '18 at 20:07
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leading zeros in rails
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You can't store 01 as integer. It will be converted to 1
You can store it as a string, or you can show it as a string "01"
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How to merge YAML arrays?
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You can merge mappings then convert their keys into a list, under these conditions:
if you are using jinja2 templating and
if item order is not important
some_stuff: &some_stuff
a:
b:
c:
combined_stuff:
<<: *some_stuff
d:
e:
f...
Why must a lambda expression be cast when supplied as a plain Delegate parameter
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A lambda expression can either be converted to a delegate type or an expression tree - but it has to know which delegate type. Just knowing the signature isn't enough. For instance, suppose I have:
public delegate void Action1();
public delegate void Action2...
make arrayList.toArray() return more specific types
...being unable to use generic constructors. So while it knows you need it to convert you an object like String[] or MyObject[], it cannot instantiate it on its own.
– user1499731
Apr 18 '13 at 20:23
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How can I get a count of the total number of digits in a number?
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Without converting to a string you could try:
Math.Ceiling(Math.Log10(n));
Correction following ysap's comment:
Math.Floor(Math.Log10(n) + 1);
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