Using Objects in For Of Loops
The for..of loop only supports iterable objects like arrays, not objects. To iterate over the values of an object, use: for (var key in test) { var item = test[key]; }
iterable
Python – TypeError: ‘int’ object is not iterable
Your problem is with this line: number4 = list(cow[n]) It tries to take cow[n], which returns an integer, and make it a list. This doesn’t work, as demonstrated below: >>> a = 1 >>> list(a) Traceback (most recent call last): File “<stdin>”, line 1, in <module> TypeError: ‘int’ object is not iterable >>> Perhaps you … Read more
Get size of an Iterable in Java
TL;DR: Use the utility method Iterables.size(Iterable) of the great Guava library. Of your two code snippets, you should use the first one, because the second one will remove all elements from values, so it is empty afterwards. Changing a data structure for a simple query like its size is very unexpected. For performance, this depends … Read more
Kotlin’s Iterable and Sequence look exactly same. Why are two types required?
The key difference lies in the semantics and the implementation of the stdlib extension functions for Iterable<T> and Sequence<T>. For Sequence<T>, the extension functions perform lazily where possible, similarly to Java Streams intermediate operations. For example, Sequence<T>.map { … } returns another Sequence<R> and does not actually process the items until a terminal operation like … Read more
Convert ES6 Iterable to Array
You can use Array.from or spread syntax (…). Example: const x = new Set([ 1, 2, 3, 4 ]); const y = Array.from(x); console.log(y); // = [ 1, 2, 3, 4 ] const z = [ …x ]; console.log(z); // = [ 1, 2, 3, 4 ]
Length of generator output [duplicate]
The easiest way is probably just sum(1 for _ in gen) where gen is your generator.
Convert Java Array to Iterable
Integer foo[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 }; List<Integer> list = Arrays.asList(foo); // or Iterable<Integer> iterable = Arrays.asList(foo); Though you need to use an Integer array (not an int array) for this to work. For primitives, you can use guava: Iterable<Integer> fooBar = Ints.asList(foo); <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>15.0</version> … Read more
Why is Java’s Iterator not an Iterable?
An iterator is stateful. The idea is that if you call Iterable.iterator() twice you’ll get independent iterators – for most iterables, anyway. That clearly wouldn’t be the case in your scenario. For example, I can usually write: public void iterateOver(Iterable<String> strings) { for (String x : strings) { System.out.println(x); } for (String x : strings) … Read more
How do I add the contents of an iterable to a set?
You can add elements of a list to a set like this: >>> foo = set(range(0, 4)) >>> foo set([0, 1, 2, 3]) >>> foo.update(range(2, 6)) >>> foo set([0, 1, 2, 3, 4, 5])
What is the difference between iterator and iterable and how to use them?
An Iterable is a simple representation of a series of elements that can be iterated over. It does not have any iteration state such as a “current element”. Instead, it has one method that produces an Iterator. An Iterator is the object with iteration state. It lets you check if it has more elements using … Read more