object

问题 I have an array of objects, each of which pairs an entry id with a tag id. I'm trying to reorganize this so that I get an object with a single index for each unique entry_id with a corresponding list of the associated tags. Changing this: tags_entries = [ {'entry_id': 1, 'tag_id': 1}, {'entry_id': 1, 'tag_id': 2}, {'entry_id': 2, 'tag_id': 1}, {'entry_id': 2, 'tag_id': 3}, {'entry_id': 3, 'tag_id': 1} ] To This: entries = { 1: { 'tags': [1, 2] }, 2: { 'tags': [1, 3] }, 3: { 'tags': [1] } }

问题 According to MDN set Method for Map, the only way for adding key/value pair to a map in javascript is a set method. I am wondering what the behavior of a map is when we add a key/value pair with a square bracket like below; const testMap = new Map(); testMap.set( 1,"firstValue" ); testMap[2] = "secondValue"; console.log( testMap ); console.log( testMap[ 2 ] ); console.log( testMap[ '2' ] ); It seems that we can have both a map and object together! Can somebody explain this to me? I know that

问题 I want to create a unit test for a function which sorts a list of objects according to some object attribute(s). Here is a code sample: class Foo: """Custom data type Foo.""" def __init__(self, a: str, b: int, c: int, d: int, e: int, f: int): self.a = a self.b = b self.c = c self.d = d self.e = e self.f = f self.g = c * d * e self.h = c * d This is a part of the unit test function which produces the error: from random import randint ... class Test(TestCase): def test_item_sort_foo(self):

问题 I am trying to fill in undefined properties into an object using values from a default object. I am basically looking to do something like underscores's "_.default" function. Here is what I have: defaults: function(anyObject){ var argArray = Array.prototype.slice.call(arguments,1); for(var key in argArray){ if(anyObject[key] == null){ anyObject[key] = argArray[key]; } } return anyObject; } I call the function with the following passed: defaults({extension : ".jpeg"}, {extension : ".gif",

问题 I have a class named StrucData in subfile.py class StrucData: def __init__(self, name): self.name=name def loadData(self, size=1, cost=1): self.size=size self.cost=cost In the main file I: call the subfile, create a list of data names loop through the list to instantiate the objects; and load data using 'loadData' method for each object (I'm using the same 'size' and 'cost' to make this example easy.) from subfile import StrucData listIndex=['data1','data2','data3'] # Create a list of objects

问题 Let's say I have this list of objects in Vue.JS data () { return{ examples: [ { exampleID: 5, exampleText: 'foo' }, { exampleID: 3, exampleText: 'bar' } ] } } Now let's say I want to display the object with the exampleID of 3 in an element i created before <Task v-for="example in examples" :key="example.exampleID" :example="example" /> I want to display everything, that is in the object (the ID and the text) Task component : <template> <div class="exercise"> <div class="exercise-id"> <h1>ID

问题 This is about form input objects with same names and unknown number of clones/duplicates such as this one: <input name="field[]" id="field[]" value=""> using jQuery, I dynamically add copies of the object which theoretically makes it look like this: <input name="field[]" id="field[]" value=""> <input name="field[]" id="field[]" value=""> <input name="field[]" id="field[]" value=""> <input name="field[]" id="field[]" value=""> ... and so one and so forth. Question: Could you show me do we

问题 This is about form input objects with same names and unknown number of clones/duplicates such as this one: <input name="field[]" id="field[]" value=""> using jQuery, I dynamically add copies of the object which theoretically makes it look like this: <input name="field[]" id="field[]" value=""> <input name="field[]" id="field[]" value=""> <input name="field[]" id="field[]" value=""> <input name="field[]" id="field[]" value=""> ... and so one and so forth. Question: Could you show me do we

问题 This question already has answers here : What does `return` keyword mean inside `forEach` function? [duplicate] (2 answers) Closed 2 years ago . I try to check if an array of object has a key value pair with the key service_tags and a value of an array including the string "trace" . If this array has it, I also want to return the position of the object. My try returns undefined . gg.fields = [ { ... }, {value: "D", display_name: "Nat."}, { "value":"Likes redwine", "display_name":"Trace 2",

问题 This question already has answers here : Javascript Object Literal referring to another property in itself from another property (3 answers) Closed 7 years ago . I have this issue, I want to be able to change the audio being used based on the browser. What I have is an object seen below, which has a "ext: { sound: '.mp3' }", at some point I will make some distinctions between browser then use something like "object.ext.sound = '.ogg'" to set the new sound type based off the browser being used