“array is not iterable”错误解析 1. 错误含义 “array is not iterable”错误意味着你尝试对一个非可迭代对象进行迭代操作。在编程中,数组(Array)通常是可迭代的,但如果你遇到了这个错误,很可能是因为某些原因,你所认为的“数组”实际上并不是一个真正的数组,或者其类型不被当前环境视为可迭代。 2. 常见原...
问TypeError:列是不可迭代的--如何在ArrayType()上迭代？EN迭代器：迭代的工具。迭代是更新换代，如你...
array.from( object, mapFunction, thisValue ) : 将两类对象转为真正的数组:类似数组的对象(array-like object)和可遍历(iterable)的对象(包括 ES6 新增的数据结构 Set 和 Map)。返回数组对象。原始值不变。 object : 必需,要转换为数组的对象。 mapFunction : 可选,数组中每个元素要调用的函数。 thisValue...
TheArray.from()method returns an Array object from any object with a length property or any iterable object. Example Create an Array from a String: Array.from("ABCDEFG"); Try it Yourself » Browser Support from()is anES6 feature(JavaScript 2015). ...
Return null if the value is not an array. Overrides: getArray in class Array Parameters: index - the index. This value must not exceed the bounds of the array. Returns: the Array object. getDictionary public MutableDictionary getDictionary(int index) Gets a Dictionary at the given index. ...
ifnotpersons:yield'None'persons = json.loads(persons)forpersoninpersons:print('name is : %s, age is %s.'% (person["name"], person["age"]))yield'name is : %s, age is %s.'% (person["name"], person["age"])classHelloWorldService2(ServiceBase):@rpc(String, _returns=Iterable(Unicode...
Creates a boolean array from an array-like object or iterable. // From an array of booleans:vararr1=newBooleanArray([true,false,false,true]);// returns <BooleanArray>varlen=arr1.length;// returns 4// From an array containing non-booleans:vararr2=newBooleanArray([{},null,'',4]);...
Gets a Array at the given index. Return null if the value is not an array. Overrides: getArrayin classArray Parameters: index- the index. This value must not exceed the bounds of the array. Returns: the Array object. getDictionary ...
the zero-based index of the value when the iterable is sorted. Nullish values are sorted to the end and ranked NaN. An optional comparator or accessor function may be specified; the latter is equivalent to calling array.map(accessor) before computing the ranks. If comparator is not specified...
If a predicate function does not return a truthy value for any array element, the method returns -1. function predicate( v ) { return ( v < 1 ); } var arr = new Uint32Array( [ 1, 2, 3 ] ); var idx = arr.findIndex( predicate ); // returns -1 A predicate function is prov...