Mixing
Angular 5 How to convert list of json objects to a list
0
I am using Angular 5 to make a To-do List App.
I am able to add tasks into the list with local storage.
But I try to have multiple lists in my App, which means when user click the drop down menu, user can select any list, and see the tasks that is in that list.
I stored data in JSON(but I do not know if I did it correct). I think what I have now is a list of JSON objects, but I need a list.
Here is my todo.service.ts
import { Injectable } from '@angular/core';
import { Todo } from '../classes/todo';
@Injectable({
providedIn: 'root'
})
export class TodoService {
private todolist: Todo;
private nextId: number;
constructor() {
let todolist = this.getTodos();
if (todolist.length == 0) {
this.nextId = 0;
} else {
let maxId = todolist[todolist.length - 1].id;
this.nextId = maxId + 1;
}
}
public addTodo(text: string, date: Date): void {
let jsonitem = new Todo(this.nextId,text,date);
let todoitem = {
'id': jsonitem["nextId"],
'text': jsonitem["text"],
'date':jsonitem["date"]
};
let todolist = this.getTodos();
todolist.push(todoitem);
this.setLocalStoragetodolist(todolist);
this.nextId++;
}
public getTodos() :Todo{
let localStorageItem = JSON.parse(localStorage.getItem('todolist'));
return localStorageItem == null ? : localStorageItem.todolist;
}
public removeTodo(id: number): void {
let todolist = this.getTodos();
todolist = todolist.filter((todoitem) => todoitem.id !== id);
this.setLocalStoragetodolist(todolist);
}
private setLocalStoragetodolist(todolist: Todo): void {
localStorage.setItem('todolist', JSON.stringify({todolist: todolist}));
}
}
Here is my lists.component.ts
@Component({
selector: 'app-lists',
templateUrl: './lists.component.html',
styleUrls: ['./lists.component.css']
})
export class ListsComponent implements OnInit {
closeResult: string;
// firstList: any;
private todolist: Todo;
constructor(private modalService: NgbModal, private listService: ListService, private todoService: TodoService) {
// this.getTodos();
}
ngOnInit() {
}
private getTodos(): void{
this.todoService.getTodos();
}
}
Here is lists.component.html
<div class="modal-body">
<select [(ngModel)] = "todolist">
<option value="" disabled selected>select a list</option>
</select>
angular
edited Nov 20 '18 at 21:42
ams
2187
asked Nov 20 '18 at 20:58
user10375726user10375726
34
add a comment |
0
I am using Angular 5 to make a To-do List App.
I am able to add tasks into the list with local storage.
But I try to have multiple lists in my App, which means when user click the drop down menu, user can select any list, and see the tasks that is in that list.
I stored data in JSON(but I do not know if I did it correct). I think what I have now is a list of JSON objects, but I need a list.
Here is my todo.service.ts
import { Injectable } from '@angular/core';
import { Todo } from '../classes/todo';
@Injectable({
providedIn: 'root'
})
export class TodoService {
private todolist: Todo;
private nextId: number;
constructor() {
let todolist = this.getTodos();
if (todolist.length == 0) {
this.nextId = 0;
} else {
let maxId = todolist[todolist.length - 1].id;
this.nextId = maxId + 1;
}
}
public addTodo(text: string, date: Date): void {
let jsonitem = new Todo(this.nextId,text,date);
let todoitem = {
'id': jsonitem["nextId"],
'text': jsonitem["text"],
'date':jsonitem["date"]
};
let todolist = this.getTodos();
todolist.push(todoitem);
this.setLocalStoragetodolist(todolist);
this.nextId++;
}
public getTodos() :Todo{
let localStorageItem = JSON.parse(localStorage.getItem('todolist'));
return localStorageItem == null ? : localStorageItem.todolist;
}
public removeTodo(id: number): void {
let todolist = this.getTodos();
todolist = todolist.filter((todoitem) => todoitem.id !== id);
this.setLocalStoragetodolist(todolist);
}
private setLocalStoragetodolist(todolist: Todo): void {
localStorage.setItem('todolist', JSON.stringify({todolist: todolist}));
}
}
Here is my lists.component.ts
@Component({
selector: 'app-lists',
templateUrl: './lists.component.html',
styleUrls: ['./lists.component.css']
})
export class ListsComponent implements OnInit {
closeResult: string;
// firstList: any;
private todolist: Todo;
constructor(private modalService: NgbModal, private listService: ListService, private todoService: TodoService) {
// this.getTodos();
}
ngOnInit() {
}
private getTodos(): void{
this.todoService.getTodos();
}
}
Here is lists.component.html
<div class="modal-body">
<select [(ngModel)] = "todolist">
<option value="" disabled selected>select a list</option>
</select>
angular
edited Nov 20 '18 at 21:42
ams
2187
asked Nov 20 '18 at 20:58
user10375726user10375726
34
add a comment |
0
0
0
I am using Angular 5 to make a To-do List App.
I am able to add tasks into the list with local storage.
But I try to have multiple lists in my App, which means when user click the drop down menu, user can select any list, and see the tasks that is in that list.
I stored data in JSON(but I do not know if I did it correct). I think what I have now is a list of JSON objects, but I need a list.
Here is my todo.service.ts
import { Injectable } from '@angular/core';
import { Todo } from '../classes/todo';
@Injectable({
providedIn: 'root'
})
export class TodoService {
private todolist: Todo;
private nextId: number;
constructor() {
let todolist = this.getTodos();
if (todolist.length == 0) {
this.nextId = 0;
} else {
let maxId = todolist[todolist.length - 1].id;
this.nextId = maxId + 1;
}
}
public addTodo(text: string, date: Date): void {
let jsonitem = new Todo(this.nextId,text,date);
let todoitem = {
'id': jsonitem["nextId"],
'text': jsonitem["text"],
'date':jsonitem["date"]
};
let todolist = this.getTodos();
todolist.push(todoitem);
this.setLocalStoragetodolist(todolist);
this.nextId++;
}
public getTodos() :Todo{
let localStorageItem = JSON.parse(localStorage.getItem('todolist'));
return localStorageItem == null ? : localStorageItem.todolist;
}
public removeTodo(id: number): void {
let todolist = this.getTodos();
todolist = todolist.filter((todoitem) => todoitem.id !== id);
this.setLocalStoragetodolist(todolist);
}
private setLocalStoragetodolist(todolist: Todo): void {
localStorage.setItem('todolist', JSON.stringify({todolist: todolist}));
}
}
Here is my lists.component.ts
@Component({
selector: 'app-lists',
templateUrl: './lists.component.html',
styleUrls: ['./lists.component.css']
})
export class ListsComponent implements OnInit {
closeResult: string;
// firstList: any;
private todolist: Todo;
constructor(private modalService: NgbModal, private listService: ListService, private todoService: TodoService) {
// this.getTodos();
}
ngOnInit() {
}
private getTodos(): void{
this.todoService.getTodos();
}
}
Here is lists.component.html
<div class="modal-body">
<select [(ngModel)] = "todolist">
<option value="" disabled selected>select a list</option>
</select>
angular
edited Nov 20 '18 at 21:42
ams
2187
asked Nov 20 '18 at 20:58
user10375726user10375726
34
I am using Angular 5 to make a To-do List App.
I am able to add tasks into the list with local storage.
But I try to have multiple lists in my App, which means when user click the drop down menu, user can select any list, and see the tasks that is in that list.
I stored data in JSON(but I do not know if I did it correct). I think what I have now is a list of JSON objects, but I need a list.
Here is my todo.service.ts
import { Injectable } from '@angular/core';
import { Todo } from '../classes/todo';
@Injectable({
providedIn: 'root'
})
export class TodoService {
private todolist: Todo;
private nextId: number;
constructor() {
let todolist = this.getTodos();
if (todolist.length == 0) {
this.nextId = 0;
} else {
let maxId = todolist[todolist.length - 1].id;
this.nextId = maxId + 1;
}
}
public addTodo(text: string, date: Date): void {
let jsonitem = new Todo(this.nextId,text,date);
let todoitem = {
'id': jsonitem["nextId"],
'text': jsonitem["text"],
'date':jsonitem["date"]
};
let todolist = this.getTodos();
todolist.push(todoitem);
this.setLocalStoragetodolist(todolist);
this.nextId++;
}
public getTodos() :Todo{
let localStorageItem = JSON.parse(localStorage.getItem('todolist'));
return localStorageItem == null ? : localStorageItem.todolist;
}
public removeTodo(id: number): void {
let todolist = this.getTodos();
todolist = todolist.filter((todoitem) => todoitem.id !== id);
this.setLocalStoragetodolist(todolist);
}
private setLocalStoragetodolist(todolist: Todo): void {
localStorage.setItem('todolist', JSON.stringify({todolist: todolist}));
}
}
Here is my lists.component.ts
@Component({
selector: 'app-lists',
templateUrl: './lists.component.html',
styleUrls: ['./lists.component.css']
})
export class ListsComponent implements OnInit {
closeResult: string;
// firstList: any;
private todolist: Todo;
constructor(private modalService: NgbModal, private listService: ListService, private todoService: TodoService) {
// this.getTodos();
}
ngOnInit() {
}
private getTodos(): void{
this.todoService.getTodos();
}
}
Here is lists.component.html
<div class="modal-body">
<select [(ngModel)] = "todolist">
<option value="" disabled selected>select a list</option>
</select>
angular
angular
edited Nov 20 '18 at 21:42
ams
2187
asked Nov 20 '18 at 20:58
user10375726user10375726
34
edited Nov 20 '18 at 21:42
ams
2187
asked Nov 20 '18 at 20:58
user10375726user10375726
34
edited Nov 20 '18 at 21:42
ams
2187
edited Nov 20 '18 at 21:42
ams
2187
edited Nov 20 '18 at 21:42
ams
2187
2187
asked Nov 20 '18 at 20:58
user10375726user10375726
34
asked Nov 20 '18 at 20:58
user10375726user10375726
34
asked Nov 20 '18 at 20:58
user10375726user10375726
34
34
add a comment |
add a comment |
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