可以使用固定输入的`map`吗? [英] Can I use `map` with fixed input?

问题描述

假设我先f(x,y) = 2x + y然后map(f, [2,4,6],[1,1,1]) 我会得到:

Suppose I do f(x,y) = 2x + ythen map(f, [2,4,6],[1,1,1]) I will get:

3-element Array{Int64,1}:
  5
  9
 13

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如果我执行map(f, [2,4,6],1)，即我想假设第二个输入始终相同， 我会得到:

---

If I do map(f, [2,4,6],1), i.e., I want to suppose that the second input is always the same, I will get:

1-element Array{Any,1}:
5

所以这不起作用.有没有一种方法，而无需对Vector [1,1,1]进行编码?

So this does not work. Is there a way to do this without coding a Vector [1,1,1] ?

推荐答案

广播行为类似"，它将数组更改为可以正常工作的大小并映射:

Broadcast "acts like" it changes the arrays to be a size which works, and maps:

broadcast(f, [2,4,6],1)

输出:

Int64[3]
5
9
13

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