Immutable.fromJS({a:{b:[10,20,30]},c:40},function(key,value){varisIndexed=Immutable.Iterable.isIndexed(value);returnisIndexed?value.toList():value.toOrderedMap();});//true,"b",{b:[10,20,30]}//false,"a",{a:{b:[10,20,30]},c:40}//false,"",{"":{a:{b:[10,20,30]}...
Computes the average of a sequence of Double values that are obtained by invoking a transform function on each element of the input sequence. Average<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) Computes the average of a sequence of Int32 values that are obtained by invoking a trans...
function count(x) { if (x > 2) { return false; } a.push(x); } const v = List.of(0, 1, 2, 3, 4); v.forEach(count); expect(a).toEqual([0, 1, 2]); }); it('concat works like Array.prototype.concat', () => { const v1 = List([1, 2, 3]); const v2 = v1...
This project setup supports code splitting viadynamicimport(). Itsproposalis in stage 3. Theimport()function-like form takes the module name as an argument and returns aPromisewhich always resolves to the namespace object of the module. Here is an example: moduleA.js constmoduleA ='Hello';...
See how nice these ‘functional’ operators are? The ES6arrow functionsyntax makes them even more neat. They return a new array every time you run them, one exception is theancientsort method: constcharacters = ['Obi-Wan','Vader','Luke']constsortedCharacters = characters.sort()console.log(...
A mutable object used as a default argument in a function could lead to unexpected behavior. This is because Python evaluates default arguments when the function is defined, not each time the function is called. Consider the following example that contains a mutable default argument: def add_to...
Typed maps may contain only entries with key and value that match the specified type: Products([[1,"Mapper 1000"]])// => TypeError: Invalid value: Invalid data structure "Mapper 1000" was passed to ProductProducts().set("P1",{name:"Mapper 1000"})// TypeError: Invalid key: "P1" is...
The function that is passed as an argument takes a number (the current value from the range) and a string (the result accumulated so far) and creates a new string containing the number prepended to the original string. The references at the end of this article contain more information on ...
Suppose you are running in a multithreaded application, and you have a function that uses a legacyjava.util.Dateobject. This object was passed to your function from elsewhere; your function has no idea where it came from—or where it might be referenced in another thread. ...
The IReadOnlyWindow has a function Mitosis which is a O(n) operation which can return a new FrontLoader if you wish to spawn off a new root, but there are a number of scenarios where this never (or rarely) occurs (such as stock market data). Anyway its a bit rough, and could ...