如何使用react测试和jest测试react中reduce方法的组件？您没有向测试组件传递任何属性，这意味着值posts被设置为undefined。只需在render方法中传递一个post的mock值作为prop
The Array reduceRight() Method Syntax array.reduce(function(total, currentValue, currentIndex, arr), initialValue) Parameters ParameterDescription function()Required. A function to be run for each element in the array. Reducer function parameters: ...
Exemplary methods include depositing a barrier layer within the reaction chamber and using a scavenging precursor to react with species on a surface of the reaction chamber. Exemplary systems include gas-phase deposition systems, such as atomic layer deposition systems, which include a barrier layer ...
*@paramcallbackfnA function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array. *@paramthisArgAn object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the thi...
I was recently mentoring someone who had trouble with the .reduce() method in JavaScript. Namely, how you get from this: const nums = [1, 2, 3] let value = 0 for (let i = 0; i < nums.length; i++) { … Sarah Drasner on Jun 13, 2018 Sponsored Build modern apps seamlessly...
reduce methodを使えば配列の中に入っている数値valueを全てまとめて一つの数値にまとめたりできる。 var array = [1,2,3,4,5]; var singleVal = array.reduce(function(previousVal, currentVal) { return previousVal + currentVal; }, 0); ...
(1.2MW) temperature model of mathematics and physics about permanent magnent synchronous generator in wind power, present basic hypothesis and boundary condition. select area that one slot opposite to calculate, utilize FEM calculate roter and stator temperature field. bring forward actual method, ...
React+Antd Design实现分页.md React-实现点击切换组件.md React-部署到Github Page.md Reduce.md SimplifyCode.md TestCode.md deepClone.js diffObj.ts eventHub.ts myRegularExpression.js nativeArrayMethod.js nativeObjectMethod.js refactorJavaScript.js React-quickStart Vue-quickStart Vue....
By far the most effective method to restrain pension spending is to give people the opportunity to work longer, because it increases tax revenues and reduces spending on pensions at the same time. 出自-2010年12月阅读原文 Moreover they site several advantages: alleviation of school overcrowding, ...
B.A Danish company wanted to involve itself in studying blood.C.Type O blood can be safely given to anyone.D.The new method is not safe enough to be put into use in hospitals now.【4】What is the best title for the textA.Four different kinds of blood.B.A new way to make type ...