use golang built-in functions rather than mathutil

[lance6716]

Enhancement

like we can use max rather than

tidb/pkg/util/mathutil/math.go

Lines 71 to 80 in 7158ac6

	// Max returns the largest one from its arguments.
	func Max[T constraints.Ordered](x T, xs ...T) T {
	maxv := x
	for _, n := range xs {
	if n > maxv {
	maxv = n
	}
	}
	return maxv
	}

[Anudhyan]

I have worked on this issue @lance6716

[lance6716]

/assign @Anudhyan

[Anudhyan]

Thanks a lot @lance6716

[Anudhyan]

@lance6716 when will this be reviewed?

[lance6716]

@lance6716 when will this be reviewed?

I'll take a look at Monday

[Anudhyan]

@lance6716 I have updated the code using inbuilt function and it is running without errors. Please check it

[lance6716]

@Anudhyan Please read the issue. Use golang built-in functions like https://pkg.go.dev/builtin#max. And delete mathutil. Max

[Anudhyan]

@Anudhyan Please read the issue. Use golang built-in functions like https://pkg.go.dev/builtin#max. And delete mathutil. Max

@lance6716 Do I need to do the same for this file only? [tidb/pkg/util/mathutil/math.go]

I have used slices replace custom Max Min functions and removed mathutil.max from line 45 with ^uint64(0). Please guide me if there is any error from my side. I am contributing for the first time!

[lance6716]

Do I need to do the same for this file only? [tidb/pkg/util/mathutil/math.go]

No. Delete mathutil.Max and let caller use golang built-in max. Also for min and other proper functions.

[Anudhyan]

@lance6716 I was working on this issue. This is the first time I am working on issue for TiDB. Please reassign it to me

[VersatileVats]

@lance6716 are you talking about this change:

result := math.Max(float64(a), float64(b))

[lance6716]

@lance6716 are you talking about this change:

result := math.Max(float64(a), float64(b))

I don't know where's the code you refer to. I think the issue is clear and I don't know how to provide more details

[VersatileVats]

Okay, thanks for the clarification! So, @Anudhyan you have to delete mathutil.Max and mathutil.Min and replace them with Go's built-in max and min functions

[lance6716]

Okay, thanks for the clarification! So, @Anudhyan you have to delete mathutil.Max and mathutil.Min and replace them with Go's built-in math.Max and math.Min functions

The built-in functions are called max, min rather than math.Max and math.Min

[Anudhyan]

Okay, thanks for the clarification! So, @Anudhyan you have to delete mathutil.Max and mathutil.Min and replace them with Go's built-in math.Max and math.Min functions

The built-in functions are called max, min rather than math.Max and math.Min

@lance6716 the built in max and min are not variadic in nature. So how will I implement it here for variable n set of arguments?

[lance6716]

Obviously max and min ARE variadic in nature. Please learn some basic golang knowledge before you contribute.

[lance6716]

/assign @songzhibin97

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