如何更换一个数组的元素？ [英] How do I replace an array's element?

问题描述

我

如何能顶替一个数组中的元素？

  A = [1,2,3,4,5]
 

我需要用更换5 [11,22,33,44] .flatten！

让 A 现在变成了

  A = [1,2,3,4,11,22,33,44]
 

解决方案

不知道如果你正在寻找替代特定值或没有，但这个作品：

  A = [1，2，3，4，5]
B = [11，22，33，44]
一张地图！ {| X |点¯x== 5？乙：X} .flatten！
 

该迭代的值 A ，并在找到 5 的值，它替换值与阵列 b ，然后变平阵列成一个阵列。

How can I substitue an element in an array?

a = [1,2,3,4,5]

I need to replace 5 with [11,22,33,44].flatten!

so that a now becomes

a = [1,2,3,4,11,22,33,44]

解决方案

Not sure if you're looking to substitute a particular value or not, but this works:

a = [1, 2, 3, 4, 5]
b = [11, 22, 33, 44]
a.map! { |x| x == 5 ? b : x }.flatten!

This iterates over the values of a, and when it finds a value of 5, it replaces that value with array b, then flattens the arrays into one array.

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