We don't always control the data we need in our applications, and that means we often find ourselves massaging and transforming our data. In this lesson, we'll learn how to transform objects in a declarative way using ramda's evolve function. Assume…
Sometimes you need to filter an array of objects or perform other conditional logic based on a combination of factors. Ramda's where function gives you a concise way to declaratively map individual predicates to object properties, that when combined,…
In this lesson we'll learn the basics of using lenses in Ramda and see how they enable you to focus changes on specific properties of an object while keeping your data immutable. what 'R.lens' do is able to get or set prop value but keep the object i…
In this lesson we'll take an array of objects and map it to a new array where each object is a subset of the original. We'll look at multiple ways to accomplish this, refactoring our code into a simple and easy to read function using Ramda's map, pic…
0. Introduction and Prerequisites This article presents an overview on how to use Oracle Data Integrator in order to manipulate data from Oracle Cloud Infrastructure Object Storage. The scenarios here present loading the data from an object storage i…
In this lesson, we’ll use a Maybe to safely operate on properties of an object that could be undefined. We’ll use our initial code as the basis for a prop utility function that can be reused with different objects and various property names. Instead…
In this lesson we'll use a handful of Ramda's utility functions to take a queryString full of name/value pairs and covert it into a JavaScript object so we can access those properties in a more useful way. Along the way, we'll build up a composition…
Besides @Input(), we can also use properties on the @Component, to pass the data. import {Component, View, NgFor, Input} from 'angular2/angular2'; @Component({ selector: 'reddit-article' }) @View({ directives: [], template: ` <article> <div class…
你有一笔数据项(data item),需要额外的数据和行为. 将这笔数据项变成一个对象. class Order... private string customer; ==> class Order... private Customer _customer; class Customer... private string _name; 动机 一开始你可能会用一个字符串来表示[电话号码]概念,但是随后你就会发现,电话号码需要[格式化].[抽取区号]之类的特殊行为.当这些臭味开始出现,你就应该…
<img src="路径">            src 路径可以是img.jpg 也可以是 绝对和相对路径+img.jpg <img src="路径" alt="风景图">         alt 图片失效时候显示的文本 chrome不支持 <img src="路径" alt="风景图" width="339" height="229"…