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是否可以操纵Array.prototype.reduce的索引参数?

[英]Is it possible to manipulate the index parameter of Array.prototype.reduce?

Normally the index value of Array.prototype.reduce takes the values from 0 until the Array.length. 通常,Array.prototype.reduce的索引值采用从0到Array.length的值。 Is it possible to manipulate that value so that it starts from Array.length and descends to 0? 是否有可能操纵该值,使其从Array.length开始并下降到0?

您可以始终为此使用Array.prototype.reduceRight()

No, but you could always do this... 不,但是您可以始终这样做...

var yourNumber = arr.length - 1 - index;

...or Array.prototype.reduceRight() which will loop from last index to first (in reverse). ...或Array.prototype.reduceRight()将从最后一个索引循环到第一个(相反)。

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