[go-nuts] [ANN] sqlite

Hello, It is driver only or that contains also the process that manages the data via sql? Thx in advance. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to

Re: [go-nuts] Why sort.IsSorted implemented with decrement?

Speaking low level - how about memory prefetch algorithms (os, hardware)? Do they work equally good when one iterates backward? On Friday, April 21, 2017 at 3:50:39 PM UTC+12, andrey mirtchovski wrote: > > > 297 for i := n - 1; i > 0; i-- { > > "i > 0" is cheaper than "i < n" on some

Re: [go-nuts] Why sort.IsSorted implemented with decrement?

> 297 for i := n - 1; i > 0; i-- { "i > 0" is cheaper than "i < n" on some processors :) On Thu, Apr 20, 2017 at 3:14 AM, wrote: > Hi > > At the moment it is implemented as > >295func IsSorted(data Interface) bool { >296n := data.Len() >

[go-nuts] doubt about sync.NewCond

I run a demo program to learn sync.NewCond： package main import ( "fmt" "sync" "time" ) var locker = new(sync.Mutex) var cond = sync.NewCond(locker) func test(x int) { cond.L.Lock() cond.Wait() fmt.Println(x) time.Sleep(time.Second * 1) cond.L.Unlock() } func

Re: [go-nuts] Why sort.IsSorted implemented with decrement?

@Rob, honestly to me they look the same: func IsSorted(data Interface) bool { n := data.Len() for i := n - 1; i > 0; i-- { if data.Less(i, i-1) { return false } } return true } func IsSortedForward(data sort.Interface) bool { n := data.Len()

Re: [go-nuts] Change imaginary part of a complex

It would be natural if real(c) and imag(c) were lvalues On Thu, Apr 20, 2017 at 1:21 PM 'Thomas Bushnell, BSG' via golang-nuts < golang-nuts@googlegroups.com> wrote: > The other way is to add the c to its conjugate and then add the imaginary > part, using cmplx.Conj. But that really amounts to

[go-nuts] Re: Large GC pauses with large map

try use value type example: map[string]*struct => map[[20]byte]struct 在 2017年4月20日星期四 UTC+8下午9:49:49，Lee Armstrong写道： > > See attached graph which shows the GC pauses of an application we have. > > I am frequently seeing pauses of 1-1.5 seconds. This is using Go 1.8.1 and > have a large map

Re: [go-nuts] Why sort.IsSorted implemented with decrement?

Try it the other way. You'll see it's not so clean. -rob On Thu, Apr 20, 2017 at 7:47 PM, Ian Lance Taylor wrote: > On Thu, Apr 20, 2017 at 2:14 AM, wrote: > > > > At the moment it is implemented as > > > >295 func IsSorted(data Interface) bool { > >

[go-nuts] Re: OpenGL Fonts

Found an antialiased, 2D vector drawing libray. This should work. github.com/memononen/nanovg Thanks, S -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to

[go-nuts] [ANN] sqlite

Early preview of a DB driver for SQLite without CGO: https://github.com/cznic/sqlite ATM Linux/Intel only. -- -j -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an

Re: [go-nuts] Why sort.IsSorted implemented with decrement?

On Thu, Apr 20, 2017 at 2:14 AM, wrote: > > At the moment it is implemented as > >295 func IsSorted(data Interface) bool { >296 n := data.Len() >297 for i := n - 1; i > 0; i-- { >298 if data.Less(i, i-1) { >299 return false >300 } >301 } >302

Re: [go-nuts] how dose netpollblock been awaked while sysmon slepp?

On Thu, Apr 20, 2017 at 5:45 AM, sydnash wrote: > > how did you debug the go runtime? use print or gcc, or some other tools? Mostly by adding print statements, and tracing (see the GODEBUG environment variable). Ian -- You received this message because you are subscribed

[go-nuts] Re: OpenGL Fonts

image atlas will assume that all needed fonts will fit in "image.NewRGBA (image.Rect(0, 0, 1024, 1024))", right? can i can call loadglyph(), when when a rune is needed? or should i call LoadGlyphs() with all possible runes during initialization? i think this will be slow, if i will initialize

[go-nuts] Re: OpenGL Fonts

thanks, didn't know about that. On Thursday, April 20, 2017 at 2:52:53 PM UTC+8, Egon wrote: > > On Tuesday, 18 April 2017 08:02:02 UTC+3, saif wrote: >> >> Hi, >> >> I like to ask for your suggestions. >> >> I found a nice project, and was trying to modify them but got stuck with >> fonts. >>

Re: [go-nuts] Re: Semicolons in Go

On Thu, Apr 20, 2017 at 12:20 PM, Michael Jones wrote: > > On Thu, Apr 20, 2017 at 8:27 AM, wrote: > >> If I can't format my programs the way I want, and I much prefer putting >> operators at the beginning of continuation lines for reasons

Re: [go-nuts] Change imaginary part of a complex

The other way is to add the c to its conjugate and then add the imaginary part, using cmplx.Conj. But that really amounts to what you're doing already. On Thu, Apr 20, 2017 at 3:20 AM Val wrote: > Hello folks > To keep real part of a complex, and set its imag part, I'm

[go-nuts] Re: about the []byte -> string comversion optimization, is it some weird?

On Wednesday, April 19, 2017 at 3:56:21 AM UTC-7, T L wrote: > > > > On Wednesday, April 19, 2017 at 3:37:29 AM UTC+8, Keith Randall wrote: >> >> This is a weird corner case in string concatenation optimization. >> >> runtime.concatstrings (what the + in this code gets rewritten to) has an >>

[go-nuts] Re: Semicolons in Go

Thank you. On Thursday, April 20, 2017 at 2:04:33 PM UTC-3, John Deighan wrote: > > If I can't format my programs the way I want, and I much prefer putting > operators at the beginning of continuation lines for reasons mentioned on > this page, and "Perl Best Practices", I simply won't use the

Re: [go-nuts] Re: Semicolons in Go

On Thu, Apr 20, 2017 at 8:27 AM, wrote: > If I can't format my programs the way I want, and I much prefer putting > operators at the beginning of continuation lines for reasons mentioned on > this page, and "Perl Best Practices", I simply won't use the language - at >

[go-nuts] Re: x509.Certificate.Verify: "x509: certificate signed by unknown authority"

Are you trying to figure out why this happens, or do you just want a self-signed certificate that works with Go? Assuming that you want to generate a working certificate, I did some work in this area a few weeks ago and encountered problems.. I found some instructions via Google for

[go-nuts] Re: Semicolons in Go

If I can't format my programs the way I want, and I much prefer putting operators at the beginning of continuation lines for reasons mentioned on this page, and "Perl Best Practices", I simply won't use the language - at least not without implementing a pre-processor. Automatic semicolon

[go-nuts] Possible to run tests against a specific Go binary?

As part of a build pipeline, I want to initially artifact the Go binary to send through all the stages from development to production. How can I run a set of tests (*_test.go) against this one binary? Can I only have blackbox tests or is whitebox possible? Or will the approach need to be, to

[go-nuts] Re: Best practice for Method Receivers

Thanks! Really appreciate the explanation! On Monday, April 3, 2017 at 6:49:02 AM UTC-7, Val wrote: > > It's a combination of : > 1) A read and a write of a variable, happening without synchronization > (see happens-before ), is always a > race, and always a

Re: [go-nuts] sql/driver: why the Result.LastInsertId method doesn't follow the Go's style for Initialisms?

I realize now (about a minute to late) that the "ID" case is mentioned specifically in the link you gave - option two it is ;-) tor. 20. apr. 2017 kl. 17.50 skrev Michael Banzon : > I don't (really) know. > > One reason could be that the "Id" is not an acronym whereas URL is. >

[go-nuts] Re: Why sort.IsSorted implemented with decrement?

I don't know the answer but here is a conjecture : slices grow at the end (through append), so a recent un-sortedness would be likely to be found near the end of the slice. (slices are the most commonly used types for "data", correct me if I'm wrong) On a related note, a while ago I

Re: [go-nuts] Large GC pauses with large map

A somewhat common culprit seems to be the following case: 1. In order for the GC to switch from marking to sweeping, it needs all cores to agree. This requires a "barrier" in the system and thus we have to wait on all CPUs. 2. The barrier check happens on a function call. 3. A CPU core is

[go-nuts] Re: Large GC pauses with large map

Use a custom map implementation. On Thursday, 20 April 2017 16:49:49 UTC+3, Lee Armstrong wrote: > > See attached graph which shows the GC pauses of an application we have. > > I am frequently seeing pauses of 1-1.5 seconds. This is using Go 1.8.1 and > have a large map that is frequently

[go-nuts] Why sort.IsSorted implemented with decrement?

Hi At the moment it is implemented as 295 func IsSorted(data Interface) bool { 296 n := data.Len() 297 for i := n - 1; i > 0; i-- { 298 if data.Less(i, i-1) { 299return false 300 } 301

[go-nuts] sql/driver: why the Result.LastInsertId method doesn't follow the Go's style for Initialisms?

While working with the driver package, I had to implement the Result interface. my first instinct was to write the LastInsertId method as "LastInsertID", but then the build failed and I figured out what was the problem. What's the reason that the Result interface doesn't follow the Go's style

Re: [go-nuts] how dose netpollblock been awaked while sysmon slepp?

thank you, i got it. how did you debug the go runtime? use print or gcc, or some other tools? Thank you for tolerate my grammatical mistakes again. 在 2017年4月20日星期四 UTC+8上午11:59:06，Ian Lance Taylor写道： > > On Wed, Apr 19, 2017 at 7:42 PM, 代君 > wrote: > > > > i have a test

Re: [go-nuts] what is the best way to to convert c++ std::string to go string in cgo programing?

Please reply to the mailing list (use "reply all"). On Thu, Apr 20, 2017 at 4:39 AM, hui zhang wrote: > Thank you , I believe most function will return string instead of string& > I test return string function , as expected it return the wrong value > as the string is

[go-nuts] Change imaginary part of a complex

Hello folks To keep real part of a complex, and set its imag part, I'm doing c = complex(real(c), -5.0) Is there a more concise way, something like c.imag = -5.0 ? I know this one doesn't compile, but I may be missing something obvious. -- You received this message because you are

Re: [go-nuts] Zero value of the map

On Thu, Apr 20, 2017 at 9:42 AM Will Faught wrote: > Why couldn't maps be implemented as a pointer to the map implementation? If you try to use the map and the pointer is nil, then the map allocates the backing implementation. Pseudocode for a built-in implementation: > >

Re: [go-nuts] Zero value of the map

Why couldn't maps be implemented as a pointer to the map implementation? If you try to use the map and the pointer is nil, then the map allocates the backing implementation. Pseudocode for a built-in implementation: type map struct { impl *mapimpl } func (m map) set(k, v interface{}) { //

[go-nuts] Re: OpenGL Fonts

On Tuesday, 18 April 2017 08:02:02 UTC+3, saif wrote: > > Hi, > > I like to ask for your suggestions. > > I found a nice project, and was trying to modify them but got stuck with > fonts. > (github.com/dskinner/material) > > I like the fonts to be configurable, but when I tried to parse the fonts