nested

问题 I'm trying to have 4 sub fields, billing code, channel, subject code and name, autopopulate certain values based on the answer of their parent field, Event Type. In other words, if the answer to event type is "A", dropdown fields will appear for each sub field based on "A". 回答1: Let's say the first select-element of the document has the values 'Plant', 'Animal' and 'Ghost' and the next select-element should change when the selected value of first ele changes, then this is how we do it: var

问题 Here, I have a conjunction expression involving some functions that return 2 values: if _, ok := f(); ok { if _, ok := g(); !ok { if h() { if _, ok := i(); ok { doStuff() } } } } Could I somehow avoid the nesting? Instead of nesting, could I write this as an expression in one line (I can't quite break or return early in this case)? 回答1: With a helper function, you can. Create a helper function which returns the second bool return value, e.g.: func check(dummy interface{}, ok bool) bool {

问题 I want a simple sample program that nests collections within collections using Wpf DataGrid. 回答1: Here's an implementation using VB.Net codebehind. Code is needed only to create test data. Class MainWindow Public Property cs As New List(Of c1) Sub New() ' This call is required by the designer. InitializeComponent() For i1 = 1 To 3 Dim c1 = New c1 cs.Add(c1) c1.c1text = i1 For i2 = 1 To 3 Dim c2 = New c2 c1.c1col.Add(c2) c2.c2text = i1 & i2 For i3 = 1 To 3 Dim c3 = New c3 c2.c2col.Add(c3) c3

问题 I'm trying to configure an application to run on Google Cloud. I was able to start a VM running Windows 2008 Server (64bit) and install VMWare Player inside it. Then I tried to install and boot a second VM within VMWare Player, and Windows crashed. So, my question is, does Google Cloud support "nesting" VMs in this fashion? In case it matters, the "inner" VM's operating system was Linux (also 64-bit). 回答1: You cannot run Virtual Machine inside the GCE VM, as Virtualization is not enabled in

问题 I'm in the process of learning functional programming, and completely getting rid of for loops has been a challenge sometimes, because they provide so much control and freedom. Below is an example of checking if a string is an isogram or not (no letters should be repeated). With nested for loops, it became an easy solution. Is there a way to do this the functional way with any high order functions or anything else? Any suggestion would be a huge help. Code: function isIsogram(string) { let

问题 I have a huge depth dictionary that represents forest (many non-binary trees) which I want to process the forest and create a text file with all possible relations of the forest, e.g. given the dictionary: {'a': {'b': {'c': {}, 'd': {}}, 'g': {}}} the generated text file will look like: a b c a b d a g Note that the nested dictionary is big and iterating over it recursively is makes a memory run-time error. What I tried doing is converting the dictionary into a list of lists recursively which

问题 I have a dictionary like below: mydict = {'a' : 'apple', 'b' : 'bobb', 'c' : { 'd' : 'dog' }, 'e' : 'dog' } Suppose I want to find all the keys with value ' dog 'In case of nesting, the keys should be separated by a dot. So the output should be a list ['e', 'c.d'] Now if I write below code in python 3, it only outputs ' e '. print(list(mydict.keys())[list(mydict.values()).index('dog')]) How can I get the nested keys? 回答1: You can use a recursion function like following: def find_key(mydict,

问题 This fiddle should demonstrate the issue: http://jsfiddle.net/5sqxQ/2/ I want the sub menu to appear underneath the parent menu. I was then was looking to extend this with JavaScript to slide the menu from underneath on hover of the parent li element. Not fussed about the JavaScript but can't figure out how to style the elements to achieve the desired layering. 回答1: You don't. Instead, make the a be the "Sign In" "button". Something like this: http://jsfiddle.net/5sqxQ/15/ 回答2: It doesn't

问题 I have this small gridComponent: @Component({ selector: 'moving-grid', templateUrl: './grid.component.html', styleUrls: ['./grid.component.css'] }) export class GridComponent { @Input('widgets') extComponents: Array<Component>; } And a second testComponent @Component({ selector: 'test', template: ` <div #content>I say hello<li>i</li><li>u</li><button (click)="test()">click me</button> world</div> ` }) export class TestComponent { @ViewChild('content') content: HTMLElement; getContent() {

问题 I just started using git and started collaborating with other developers on same code. I have worked a little with SVN before but never had to collaborate with other people on my codebase. Now with collaborators working on same code, I need an efficient workflow. While searching for such, I found this, and it seems like a good workflow for our requirement. My repository resides in a local machine. I created the repository with git init --bare . I added the initial codes to master and pushed