dongyou2635
2018-04-10 12:46
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如何在Golang中将uint64转换为big.Int?

I was wondering how can I convert a uint64 to big.Int in golang? the shortest way.

I have tried new(big.Int).SetInt64(int64(a uint64 number)).

I don't like it cause it's long, too much nested conversions and I'd rather use a built-in function if it exists.

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我想知道如何将 uint64 转换为 big.Int < / code>在golang中? 最短的方法。

我尝试了 new(big.Int).SetInt64(int64(uint64数字))

我不喜欢它,因为它需要很长的嵌套转换,如果存在,我宁愿使用内置函数。

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  • doudongfu8006 2018-04-10 13:01
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    Shortest and safest would be to use the Int.SetUint64() method:

    var x uint64 = 10
    
    i := new(big.Int).SetUint64(x)
    
    fmt.Println(i) // Prints 10
    

    Try it on the Go Playground.

    Care should be taken when manually converting uint64 to int64 (as in your example), as overflow might happen which you won't be notified about, but you will end up with a negative value.

    If you can be sure the value fits into an int64, using the big.NewInt() function is shorter:

    i := big.NewInt(int64(x))
    

    Try this one on the Go Playground.

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