In this lesson, we'll use Promise.all to get an array that contains the resolved values from multiple promises. Then we'll see how we can use Ramda to convert that array of values into a single object using zip with fromPairs. Then we'll refactor to…
mybatis插入数据时报错: Cause: org.apache.ibatis.executor.ExecutorException: Error getting generated key or setting result to parameter object. Cause: java.sql.SQLException: 不支持的特性 at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFacto…
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…
In this lesson, we'll look at how we can use Ramda's invoker and constructNfunctions to take methods of an object and turn them into reusable utility functions that are curried and accept their object as the last argument. We'll convert a dot-chained…
Promise chains can be a powerful way to handle a series of transformations to the results of an async call. In some cases, additional promises are required along the way. In cases where there are no new promises, function composition can reduce the n…
In this lesson, we'll use Ramda's toPairs function, along with map, join, concatand compose to create a reusable function that will convert an object to a querystring. const R = require('ramda'); const {map, join, concat, compose, toPairs} = R; const…
