[go-nuts] Go 1.14.4 and Go 1.13.12 are released

[Dmitri Shuralyov]

Hello gophers,

We have just released Go versions 1.14.4 and 1.13.12, minor point releases.

These releases include fixes to the go doc command, the runtime, and
the encoding/json, go/types, math/big, and os packages.

View the release notes for more information:
https://golang.org/doc/devel/release.html#go1.14.minor

You can download binary and source distributions from the Go web site:
https://golang.org/dl/

To compile from source using a Git clone, update to the release with
"git checkout go1.14.4" and build as usual.

Thanks to everyone who contributed to the release.

Cheers,
Dmitri and Andy for the Go team

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Re: [go-nuts] Re: Incorrect arithmetic answers

[Michael Jones]

fixed, in light of the prior crucial comment...
https://play.golang.org/p/d-AwGEwj_YB

On Mon, Jun 1, 2020 at 12:20 PM  wrote:

> Floating point calculations are imprecise.
>
> https://0.30004.com/
>
> https://www.phys.uconn.edu/~rozman/Courses/P2200_15F/downloads/floating-point-guide-2015-10-15.pdf
>
> s
>
> On Monday, June 1, 2020 at 11:56:55 AM UTC-7, Saksham Saxena wrote:
>>
>> Hello,
>>
>> I was trying to implement Substring Search using a rolling hash function
>> (fairly simple implementation): https://play.golang.org/p/_fjgxPC06So
>>
>> This works correctly and as expected. However, if you change the const
>> `baseNumber` to 128, the program is unable to do the intermediate
>> arithmetic incorrectly (see the difference after running it).
>>
>> How could this be ? I've stared at it long enough and it doesn't seem
>> like it's overflowing (or is it really ? I thought float64 had great range
>> ?)
>>
>> Any ideas/comments are appreciated.
>>
>> Thanks!
>> Saksham
>>
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>


-- 

*Michael T. jonesmichael.jo...@gmail.com *

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[go-nuts] Re: Incorrect arithmetic answers

[cratermoon]

Floating point calculations are imprecise.

https://0.30004.com/
https://www.phys.uconn.edu/~rozman/Courses/P2200_15F/downloads/floating-point-guide-2015-10-15.pdf

s

On Monday, June 1, 2020 at 11:56:55 AM UTC-7, Saksham Saxena wrote:
>
> Hello,
>
> I was trying to implement Substring Search using a rolling hash function 
> (fairly simple implementation): https://play.golang.org/p/_fjgxPC06So
>
> This works correctly and as expected. However, if you change the const 
> `baseNumber` to 128, the program is unable to do the intermediate 
> arithmetic incorrectly (see the difference after running it). 
>
> How could this be ? I've stared at it long enough and it doesn't seem like 
> it's overflowing (or is it really ? I thought float64 had great range ?)
>
> Any ideas/comments are appreciated. 
>
> Thanks!
> Saksham
>

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[go-nuts] Incorrect arithmetic answers

[Saksham Saxena]

Hello,

I was trying to implement Substring Search using a rolling hash function 
(fairly simple implementation): https://play.golang.org/p/_fjgxPC06So

This works correctly and as expected. However, if you change the const 
`baseNumber` to 128, the program is unable to do the intermediate 
arithmetic incorrectly (see the difference after running it). 

How could this be ? I've stared at it long enough and it doesn't seem like 
it's overflowing (or is it really ? I thought float64 had great range ?)

Any ideas/comments are appreciated. 

Thanks!
Saksham

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