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What is the optimal Jewish toenail cutting algorithm?
...
function permute (b, n, a) {
if (n==4) {
b.push(a.slice(0)) //copy array
}
else {
for (var i = n; i < 5; i++) {
swap(a,n,i)
permute(b, n+1, a)
swap(a,n,i)
}
}
}
var a = [1,2,3,4,5]
var b = []
var c = []
permute(b,0,a)
for (var i = 1; i < b.length-1; i...
Kotlin: how to pass a function as parameter to another?
... opr(a, b)
fun calc(a: Int, opr: (Int) -> Int) = opr(a)
fun main(args: Array<String>) {
calc(1, 2, { a, b -> Operator().add(a, b) })
calc(1, { Operator().inc(it) })
}
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i...
Using Mockito with multiple calls to the same method with the same arguments
...ss MultipleAnswer<T> implements Answer<T> {
private final ArrayList<Answer<T>> mAnswers;
MultipleAnswer(Answer<T>... answer) {
mAnswers = new ArrayList<>();
mAnswers.addAll(Arrays.asList(answer));
}
@Override
public T answer(...
How to simplify a null-safe compareTo() implementation?
...
This does not work for Collections.sort(Arrays.asList(null, val1, null, val2, null)) as it will try to call compareTo() on a null object. It looks like a problem with the collections framework to be honest, trying to figure out how to corner this.
...
No provider for “framework:jasmine”! (Resolving: framework:jasmine)
...smine will not solve the issue. you have to add 'karma-jasmine' to plugins array like plugins: ['karma-jasmine'].
– Thaadikkaaran
Mar 4 '16 at 10:39
...
Group By Multiple Columns
... to get other columns from this query, which were not grouped? If there is array of object, I would like to get this object grouped by two columns, but get all properties from the object, not just those two columns.
– FrenkyB
May 11 '18 at 10:43
...
Convert base-2 binary number string to int
...s is by using the bitstring module:
>>> from bitstring import BitArray
>>> b = BitArray(bin='11111111')
>>> b.uint
255
Note that the unsigned integer is different from the signed integer:
>>> b.int
-1
The bitstring module isn't a requirement, but it has lots...
How do you test functions and closures for equality?
...e, which was kind of devastating because I had been storing closures in an Array and now can't remove them with indexOf({$0 == closure} so I have to refactor. IMHO optimization shouldn't influence language design, so without a quick fix like the now deprecated @objc_block in matt's answer, I would ...
Delegates: Predicate vs. Action vs. Func
...nc<TInput, TOutput>, but with semantics. Used by List.ConvertAll and Array.ConvertAll, but personally haven't seen it anywhere else.
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foll...
File content into unix variable with newlines
...ge 4 has the mapfile builtin to read lines from the standard input into an array variable.
help mapfile
mapfile < file.txt lines
printf "%s" "${lines[@]}"
mapfile -t < file.txt lines # strip trailing newlines
printf "%s\n" "${lines[@]}"
See also:
http://bash-hackers.org/wiki/doku.ph...