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gyorokpeter

Apparently .j.k loses precision with large enough numbers: q)`long$.j.k"1471220573128024107" 1471220573128024064 However I'm trying to interface with a program that expects the number to round-trip, i.e. if I export the JSON again, it should contain ...

gyorokpeter

I have an application that sends messages to a q process using k() with a negative handle. I would expect this call to not block, but very rarely it does and both the application and the q process become unresponsive (the communication is bidirection...

gyorokpeter

Whenever I press Ctrl+C, the console stops responding to keyboard input. This is happening on Windows 10.q)while[1b]'stop [0] while[1b] ^q) //typing anything has no effectIs there a way to trigger the 'stop signal and still keep the ability to use th...

gyorokpeter

I have a binary file composed of variable-length records with each record starting with a 4 byte record type identifier followed by a 4-byte length (little-endian) then the data.I'm trying to find the record boundaries. Using this code:nextTag:{[data...

gyorokpeter

I just found out that q can listen on the same port as another app. For example, one of the processes with a listening socket:nvcontainer.exe 3180 TCP LAPTOP 65000 LAPTOP 0 LISTENING And if I do \p 65000 in a q process, I will see this, together with...

gyorokpeter

Here is my version:d15:{[n;x]ns:"J"$","vs x; arr:(1+max[ns])#0N; arr[-1_ns]:1+til count[ns]-1; c:n-count ns; num:last ns; step:count[ns]; do[c; nxt:0^step-arr[num]; if[count[arr]<=num;arr,:num#0N]; arr[num]:step; num:nxt; step+:1; ]; num};d15p1:{d15[...

gyorokpeter

Looks like this is still not fixed by version 3.6.2017. augusztus 13., vasárnap 16:36:47 UTC+1 időpontban Péter Györök a következőt írta:Whenever I press Ctrl+C, the console stops responding to keyboard input. This is happening on Windows 10.q)while[...

gyorokpeter

I thought about that too. My problem with DLLs is that you can't rebuild a DLL as long as any application is using it, so I have to close every q process that has the DLL loaded.2017. június 19., hétfő 21:31:41 UTC+1 időpontban Alexander Belopolsky a...

gyorokpeter

That still doesn't get the useful output:q)system"dir foo 2>&1 || echo." Volume in drive D has no label. Volume Serial Number is E2F8-5938 Directory of D:\Utility\qFile Not Found," "Only one space is returned, same as system"echo.".2015. október 2., ...

gyorokpeter

That swallows the error but also the useful output.2015. szeptember 27., vasárnap 19:32:10 UTC+2 időpontban David Demner a következőt írta: Can't you just error trap in kdb?@[system;cmd;{}] From: Péter GyörökSent: Sunday, September 27, 2015 00:53To: ...

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Extended JSON parsing

k() blocks even with negative handle

Ctrl+C on Windows

iterating over variable-length records

Windows: q can listen on same port as other app

Re: Advent of code2020 day 15 solution improvement

Re: Ctrl+C on Windows

Re: iterating over variable-length records

Re: Ignoring exit code from "system" on Windows

Re: Ignoring exit code from "system" on Windows