pipes-filters | 易学教程

How do you implement Pipes and Filters pattern with LinqToSQL/Entity Framework/NHibernate?

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问题 While building by DAL Repository, I stumbled upon a concept called Pipes and Filters. I read about it here, here and saw a screencast from here. I am still not sure how to go about implementing this pattern. Theoretically all sounds good , but how do we really implement this in an enterprise scenario? I will appreciate, if you have any resources,tips or examples ro explanation for this pattern in context to the data mappers/ORM mentioned in the question. Thanks in advance!! 回答1: Ultimately,

How do you implement Pipes and Filters pattern with LinqToSQL/Entity Framework/NHibernate?

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how to create and call a pipe from the component in angular 2?

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问题 I want to create a dynamic pipe which I am going to call from the component. import {Component, Pipe, PipeTransform} from 'angular2/core'; @Pipe({ name: 'filter', pure: false }) export class filter implements PipeTransform { transform(value) { this.items1=value; this.ticket1 = []; if (this.items1.length >0) { for (var i = 0; i < this.items1.length; i++) { this.ticket1.push(this.items1[i]) } } } } I want to call this pipe from the component. 回答1: You need to specify it within the pipes

Invalid argument 'date format' for pipe 'DatePipe'?

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问题 This seems to be a simple question. I'm using pipes in my Ionic 2 application for dates format. This is the recieved webservice reponse. [ { "MessageID": 544882, "CategoryID": 1, "DateSent": "2015-05-18T02:30:56", "Title": "Jobseeker App", "MessageContent": "Hi Test guy just started to use the app..", "Sender": null, "Recipient": null, "DateReceived": null, "DateRead": "2015-05-18T02:30:56", "Note_Direction": "sent", "Viewed": 0, "AppointmentDateTime": null, "MessageAttachments": [ ] }, {

Multiple pipes simultaneously in Angular 2

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问题 I am working on an Angular 2 project. I have a table with multiple columns. Every column has different logic for sorting (number, string.lowercase, amountValue in % and INR). Rows are sorted on the basis of sorting logic of that column. To acheive this, I am using a custom pipe named sortTable with few arguments. At the same time, there is an input field at the top that binds to searchTerm variable. To filter the data with searchTerm, I am using another custom pipe named sortTableRow.

Angular2 {pipes} - How to format a phone number?

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问题 I've searched here and there, and I am not able to find something specific about formatting a phone number. Currently, I am retrieving phone numbers form a JSON in the following format: 25565115 However, I want to achieve this result: 02-55-65-115 For that, I believe that I need to use a custom pipe and I don't think that there is a built-in one that does it automatically. Can you please give me some guidance on how to do so? 回答1: PLUNKER pipe implementation in TS would look like this import

Cannot read property 'toUpperCase' of undefined (“<input name= ”searchtext“ [(ngModel)]=”searchtext">

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问题 I am trying to do filter a number from a number array. but I got this errors.this a my codes. app.module.ts import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core'; import { AppComponent } from './app.component'; import { NumberFilterPipe } from './number-filter.pipe'; import { FormsModule } from '@angular/forms'; import { StringFilterPipe } from './string-filter.pipe'; import { NumberFilterService } from './service/number-filter.service'; @NgModule

Invalid argument 'date format' for pipe 'DatePipe'?

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This seems to be a simple question. I'm using pipes in my Ionic 2 application for dates format. This is the recieved webservice reponse. [ { "MessageID": 544882, "CategoryID": 1, "DateSent": "2015-05-18T02:30:56", "Title": "Jobseeker App", "MessageContent": "Hi Test guy just started to use the app..", "Sender": null, "Recipient": null, "DateReceived": null, "DateRead": "2015-05-18T02:30:56", "Note_Direction": "sent", "Viewed": 0, "AppointmentDateTime": null, "MessageAttachments": [ ] }, { "MessageID": 544886, "CategoryID": 1, "DateSent": "2015-05-18T02:42:45", "Title": "Jobseeker App",

angular 2. Pipes. Cannot read property of undefined

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问题 i made a pipe @Pipe({ name: 'orgFilter' }) export class OrgFilterPipe implements PipeTransform { transform(orgs: Organization[], args: String[]): any { console.log(orgs) let filter = args[0].toLowerCase(); return filter ? orgs.filter((org:Organization) => org.name.toLowerCase().indexOf(filter) != -1): orgs; } and using it in html: <tbody> <tr *ngFor="#organization of organizations | orgFilter:listFilter.value"> <td>{{ organization.organizationName }}</td> <td>{{ organization.city }}</td> <td>

angular 2. Pipes. Cannot read property of undefined

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i made a pipe @Pipe({ name: 'orgFilter' }) export class OrgFilterPipe implements PipeTransform { transform(orgs: Organization[], args: String[]): any { console.log(orgs) let filter = args[0].toLowerCase(); return filter ? orgs.filter((org:Organization) => org.name.toLowerCase().indexOf(filter) != -1): orgs; } and using it in html: <tbody> <tr *ngFor="#organization of organizations | orgFilter:listFilter.value"> <td>{{ organization.organizationName }}</td> <td>{{ organization.city }}</td> <td>{{ organization.state }}</td> <td>{{ organization.country }}</td> <td> <i class="material-icons">mode