1. 解释TypeError: reduce of empty array with no initial value错误的含义 这个错误通常出现在使用JavaScript的Array.prototype.reduce()方法时,当你试图对一个空数组进行归约操作,并且没有提供初始值(accumulator)时。reduce()方法需要一个初始值来开始累积操作,如果没有提供初始值,并且数组为空,那么它就无法开始累...
您的 reducer 函数的返回值分配给累计器，该返回值在数组的每个迭代中被记住，并最后成为最终的单个结果值。如果数组为空且没有提供initialValue，会抛出错误TypeError: reduce of empty array with no initial value 可以通过添加initialValue来解决。详见： https://developer.mozilla.org/zh-CN/docs/Web/...
建议尽量提供初始值,以应对空数组的特殊情况。 Uncaught TypeError: Reduce of empty array with no initial value 2 reduce 的简单实现 要想真正理解这个神奇的 reduce 的运行机制,还得自己实现一下。这里我实现个简单的 reduce 方法: Array.prototype.myReduce = function(callbackFn, initVal) { const arr = ...
// 假设我们有一个初始值initialValueletinitialValue =10;// 检查对象O是否为空,并且是否有给初始值if(len ===0&&arguments.length<2) {// 如果是,就报错thrownewTypeError("Reduce of empty array with no initial value"); } 检查对象里有没有Pk这个属性 // 检查一下对象里有没有Pk这个属性,如果有,就...
Stacktrace: TypeError: Reduce of empty array with no initial value at Array.reduce (<anonymous>) at Object.children (https://xxx.yyy/main.a726808c41da12ea7cc9.js:2:1885533) at Ji.render (https://xxx.yyymain.a726808c41da12ea7cc9.js:2:1550799) at Hs (https://xxx.yyy/main.a726808c4...
The JavaScript exception "reduce of empty array with no initial value" occurs when a reduce function is used.
What is the current behavior?Installing dependencies fails witherror An unexpected error occurred: "Reduce of empty array with no initial value". If the current behavior is a bug, please provide the steps to reproduce. This is the simplest reproduction I've been able to create. The result sho...
为了将数字转换为数字数组，您可以使用下面这个方便的代码片段：
TypeError: reduce of empty array with no initial value Error type TypeError What went wrong? In JavaScript, there are several reduce functions: These functions optionally take aninitialValue(which will be used as the first argument to the first call of thecallback). However, if no initial val...