A 100% pure Bash function that supports multi-character delimiters is: function join_by { local d=${1-} f=${2-} if shift 2; then printf %s “$f” “${@/#/$d}” fi } For example, join_by , a b c #a,b,c join_by ‘ , ‘ a b c #a , b , c join_by ‘)|(‘ a b c #a)|(b)|(c join_by ‘ %s … Read more
PowerShell unrolls arrays returned from a function. Prepend the returned array with the comma operator (,, unary array construction operator) to wrap it in another array, which is unrolled on return, leaving the nested array intact. function testArray { $array1 = @() $array1 += ,@(“Apple”,”Banana”) return ,$array1 }
Scala 2.7 tried to add functionality to Java [] arrays, and ran into corner cases that were problematic. Scala 2.8 has declared that Array[T] is T[], but it provides wrappers and equivalents. Try the following in 2.8 (edit/note: as of RC3, GenericArray is ArraySeq–thanks to retronym for pointing this out): import scala.collection.mutable.{GenericArray=>GArray, WrappedArray=>WArray} scala> GArray(0,1,2) … Read more
You can just use image to index into lut if lut is 1D. Here’s a starter on indexing in NumPy: http://www.scipy.org/Tentative_NumPy_Tutorial#head-864862d3f2bb4c32f04260fac61eb4ef34788c4c In [54]: lut = np.arange(10) * 10 In [55]: img = np.random.randint(0,9,size=(3,3)) In [56]: lut Out[56]: array([ 0, 10, 20, 30, 40, 50, 60, 70, 80, 90]) In [57]: img Out[57]: array([[2, 2, 4], … Read more
Because it would break type-safety otherwise. If not, you would be able to do something like this: val arr:Array[Int] = Array[Int](1,2,3) val arr2:Array[Any] = arr arr2(0) = 2.54 and the compiler can’t catch it. On the other hand, lists are immutable, so you can’t add something that is not Int
You’re trying to create an array of [pscustomobject]s in your $outputArray variable iteratively, using +=, but you’re not initializing $outputArray as an array – see the bottom section for an explanation of the resulting behavior. Thus, the immediate solution to your problem is to do just that: # Do this before your `foreach` loop, then … Read more
You might encapsulate the ambiguity of the result using an Enum with Associated Values (String and Array in this case), for example: enum MetadataType: Codable { case array([String]) case string(String) init(from decoder: Decoder) throws { let container = try decoder.singleValueContainer() do { self = try .array(container.decode(Array.self)) } catch DecodingError.typeMismatch { do { self = try … Read more
First option –> Use aggregation Because your some of the documents in your collection may or may not contain permissions field or is type not equal to array that’s why you are getting this error. You can find the $type of the field and if it is not an array or not exists in your … Read more
You can map the stride instead of iterating it, that allows to get the result as a constant: let input = [1, 2, 3, 4, 5, 6] let output = stride(from: 0, to: input.count – 1, by: 2).map { (input[$0], input[$0+1]) } print(output) // [(1, 2), (3, 4), (5, 6)] If you only need to … Read more
The merge key type is probably what you want. It uses a special << mapping key to indicate merges, allowing an alias to a mapping (or a sequence of such aliases) to be used as an initializer to merge into a single mapping. Additionally, you can still explicitly override values, or add more that weren’t … Read more