nested
How to query nested arrays in a postgres json column?
Use jsonb_array_elements() in a lateral join as many times as the depth of a json array which elements you want to compare: select schools->>’school_id’ school_id, addresses->>’addr_id’ addr_id, addresses->>’house_description’ house_description, addresses->>’house_no’ house_no from title_register_data, jsonb_array_elements(address_data->’schools’) schools, jsonb_array_elements(schools->’addresses’) addresses where addresses->>’house_description’ = addresses->>’house_no’; school_id | addr_id | house_description | house_no ———–+———+——————-+———- 1 | 4 | 1 | … Read more
Objects inside objects in javascript
var pause_menu = { pause_button : { someProperty : “prop1”, someOther : “prop2” }, resume_button : { resumeProp : “prop”, resumeProp2 : false }, quit_button : false }; then: pause_menu.pause_button.someProperty //evaluates to “prop1” etc etc.
Is there a recursive version of the dict.get() built-in?
A very common pattern to do this is to use an empty dict as your default: d.get(‘foo’, {}).get(‘bar’) If you have more than a couple of keys, you could use reduce (note that in Python 3 reduce must be imported: from functools import reduce) to apply the operation multiple times reduce(lambda c, k: c.get(k, {}), … Read more
Counting depth or the deepest level a nested list goes to
Here is one way to write the function depth = lambda L: isinstance(L, list) and max(map(depth, L))+1 I think the idea you are missing is to use max()
How to recursively replace character in keys of a nested dictionary?
Yes, there exists better way: def print_dict(d): new = {} for k, v in d.iteritems(): if isinstance(v, dict): v = print_dict(v) new[k.replace(‘.’, ‘-‘)] = v return new (Edit: It’s recursion, more on Wikipedia.)
Replacing nested if statements
Well, not directly an answer to your question since you specifically ask about switch/case statements, but here is a similar question. Invert “if” statement to reduce nesting This talks about replacing nested if’s with guard-statements, that return early, instead of progressively checking more and more things before settling on a return value.
Dynamic nested Material menu from json object in Angular 5
The following structure should work for you: <button mat-button [matMenuTriggerFor]=”main_menu”>My menu</button> <mat-menu #main_menu=”matMenu”> <ng-container *ngFor=”let mainItem of objectKeys(my_menu)”> <button mat-menu-item [matMenuTriggerFor]=”sub_menu”>{{ mainItem }}</button> <mat-menu #sub_menu=”matMenu”> <button *ngFor=”let subItem of my_menu[mainItem]” mat-menu-item>{{ subItem }}</button> </mat-menu> </ng-container> </mat-menu> Since I placed sub_menu inside the embedded template (*ngFor) we can use the same name for template reference variable(#sub_menu). … Read more
How do I setup nested views in AngularJS?
AngularJS ui-router solved my issues 🙂
WPF: How to bind to a nested property?
You can also set DataContext for TextBox in XAML (I don’t know if it’s optimal solution, but at least you don’t have to do anything manually in codeBehind except of implementing INotifyPropertyChanged). When your TextBox has already DataContext (inherited DataContext) you write code like this: <TextBox DataContext=”{Binding Path=ParentProperty}” Text=”{Binding Path=ChildProperty, Mode=TwoWay}” Width=”30″/> Be aware that … Read more