在Haskell中“重复"吗? [英] 'Repeat' in Haskell?

问题描述

我是Haskell的新手，我有一个简单的问题.

I'm very new to Haskell, and I have a simple question.

我可以对a和b使用什么函数，这将导致a，b次.

What function can I use with a and b that will result in a, b times.

示例:
a = 4 |b = 3
将返回:
[4，4，4]

谢谢！

推荐答案

复制:

replicate 3 4

将是:

[4,4,4]

---

当您知道所需的函数的类型是什么(在这种情况下，很明显，所需的函数具有类似于 Int-> a-> [a] 的类型))，您可以使用 Hoogle 来找到它.

---

When you know what's the type of the function you need (in this case it was quite obvious that the function you needed had a type similar to Int -> a -> [a]) you can use Hoogle in order to find it.

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