It’s a while ago I saw this first, but recently I bumped into it again and found out I never posted a link, so here it goes:
A game to help you master the pen tool
Source: The Bézier Game
–jeroen
Archive for the ‘Software Development’ Category
The Bézier Game
Posted by jpluimers on 2017/06/27
Posted in Development, EPS/PostScript, Font, Power User, Software Development | Leave a Comment »
Recent bitsaver entries on Z80 assembly, CPM and concurrent Pascal
Posted by jpluimers on 2017/06/26
- http://bitsavers.trailing-edge.com/pdf/osborne/books/Z80_Assembly_Language_Subroutines_1983.pdf
- http://bitsavers.trailing-edge.com/pdf/digitalResearch/cpm/CPM_Assembly_Language_Programming_1983.pdf
- http://bitsavers.trailing-edge.com/pdf/osborne/books/CPM_Assembly_Language_Programming_1983.pdf
- http://bitsavers.trailing-edge.com/pdf/calTech/concurrentPascal/Concurrent_Pascal_Introduction_Jul75.pdf
- http://bitsavers.trailing-edge.com/pdf/calTech/concurrentPascal/Concurrent_Pascal_Machine_Oct75.pdf
- http://bitsavers.trailing-edge.com/pdf/calTech/concurrentPascal/Concurrent_Pascal_Report_Jun75.pdf
- http://bitsavers.trailing-edge.com/pdf/calTech/concurrentPascal/Sequential_Pascal_Report_Jul75.pdf
–jeroen
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Posted in Assembly Language, CP/M, Development, History, Software Development, Z80 | Leave a Comment »
middelink/mikrotik-fwban: Use your Mikrotik firewall to do fail2ban like blocking of unwanted IPs. Written in Go
Posted by jpluimers on 2017/06/26
Edit 20260501: be careful, as this damaged the NAND memory of my router because of too many write cycles. Root cause: too high update frequency.
Interesting: middelink/mikrotik-fwban: Use your Mikrotik firewall to do fail2ban like blocking of unwanted IPs. Written in Go.
It might beat these (that just count SSH connections, not failed connection attempts)
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Posted in Development, Hardware, Internet, MikroTik, Network-and-equipment, Power User, RouterOS, routers, Scripting, Software Development, WinBox | Leave a Comment »
Anyone having a solution for “Microsoft Visual Studio” throwing “The operation could not be completed” when including a file in a PowerShell project?
Posted by jpluimers on 2017/06/22
The operation could not be completed.
Include In Project
I’ve got a bunch of PowerShell projects in a solution. In some of them, I can include new files, in others I get the below error.
The diff of a good/bad project is below as well.
Two questions:
- Does anybody know how to work around this?
- Does anybody know how to find the actual error for this?
---------------------------
Microsoft Visual Studio
---------------------------
The operation could not be completed
---------------------------
OK
---------------------------
Good file: WindowsLogsCbsInquiry.pssproj
Bad file: WindowsTempInquiry.pssproj
–jeroen
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Posted in CommandLine, Development, PowerShell, Software Development, Visual Studio 2015, Visual Studio and tools | Leave a Comment »
Another of +Steven Wittens step-by-step visual mathematical explorations
Posted by jpluimers on 2017/06/22
Another of +Steven Wittens step-by-step visual mathematical explorations: Fourier Analysis Look and Listen For this one headphones and a microphone are required, including a good machine…
–jeroen
–more–
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Posted in Algorithms, Development, Software Development | Leave a Comment »
OpenSuSE Tumbleweed – testing the password of any user with getent and openssl
Posted by jpluimers on 2017/06/21
For one of my VMs I forgot to note which of the initial password I had changed, so I wanted to check them.
Since I didn’t have a keyboard attached to the console and ssh wasn’t allowing root, I needed an alternative than actual login to test the passwords.
Luckily /etc/shadow, with getent and openssl came to the rescue.
Since getent varies per distribution, here is how it works on OpenSuSE:
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Posted in *nix, *nix-tools, ash/dash, bash, bash, Development, Encoding, Hashing, Linux, md5, openSuSE, Power User, Scripting, Security, SHA, SHA-256, SHA-512, Software Development, SuSE Linux | Leave a Comment »
When someone writes UTF-8 and UTF-16 strings to the same file in binary format without converting between them…
Posted by jpluimers on 2017/06/21
A while ago, I had to fix some stuff in an application that would write – using a binary mechanism – UTF-8 and UTF-16 strings (part of it XML in various flavours) to the same byte stream without converting between the two encodings.
Some links that helped me investigate what was wrong, choose what encoding to use for storage and fix it:
- unicode – How to Convert Ansi to UTF 8 with TXMLDocument in Delphi – Stack Overflow
- delphi – What should I use? UTF8 or UTF16? – Stack Overflow
- IXMLDocument.SaveToStream does not always use UTF-16 encoding | Marc Durdin’s Blog
- delphi – Length() vs Sizeof() on Unicode strings – Stack Overflow
TEncoding.UTF8.GetBytes: utf 8 – String to byte array in UTF-8? – Stack OverflowSysUtils.ByteLength()is not the nicest function, so use only for a quick-fix Delphi Unicode String Length in Bytes – Stack OverflowAnsiString,UnicodeStringet al: String Types (Delphi) – RAD Studio- Question about type identity – delphi
- On the type compatibility in Delphi | The Programming Works
- Joe White’s Blog » Blog Archive » Grammar details of Delphi’s “type type” feature
- Type Compatibility and Identity (Delphi) – RAD Studio
- Delphi “type types”: similar types but not the same type identity, some examples.
- Converting in various Delphi versions (pre-Unicode and post-Unicode versions): Delphi: Encoding Strings as Python do – Stack Overflow
- UTF-8 Conversion Routines – RAD Studio
–jeroen
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Posted in Delphi, Delphi 10 Seattle, Delphi 10.1 Berlin (BigBen), Delphi XE8, Development, Encoding, Software Development, UTF-16, UTF-8, UTF16, UTF8, XML, XML/XSD | 3 Comments »
How can I get the default code page for a locale? – The Old New Thing
Posted by jpluimers on 2017/06/20
Ask GetLocaleInfo (example function GetAnsiCodePageForLocale included): [WayBack] How can I get the default code page for a locale? – The Old New Thing
UINT GetAnsiCodePageForLocale(LCID lcid) { UINT acp; int sizeInChars = sizeof(acp) / sizeof(TCHAR); if (GetLocaleInfo(lcid, LOCALE_IDEFAULTANSICODEPAGE | LOCALE_RETURN_NUMBER, reinterpret_cast<LPTSTR>(&acp), sizeInChars) != sizeInChars) { // Oops - something went wrong } return acp; }And even though you didn’t ask, you can use
LOCALE_IDEFAULTCODEPAGEto get the OEM code page for a locale.Bonus gotcha: There are a number of locales that are Unicode-only. If you ask the
GetLocaleInfofunction and ask for their ANSI and OEM code pages, the answer is “Um, I don’t have one.” (You get zero back.)
Related:
- [WayBack] windows – Why ANSI Code-Page and Console Code-Page are different? – Stack Overflow
- [WayBack] LOCALE_IDEFAULT* Constants – Windows applications | Microsoft Docs
- [WayBack] GetLocaleInfoA function | Microsoft Docs
- [WayBack] GetLocaleInfoW function | Microsoft Docs
- [WayBack] GetLocaleInfoEx function | Microsoft Docs
–jeroen
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Posted in Development, Encoding, internatiolanization (i18n) and localization (l10), Software Development, The Old New Thing, Windows Development, Windows-1252 | 2 Comments »
Mac OS X – need to research this one day: How do I Check DHCP Lease info in terminal – via Ars Technica OpenForum
Posted by jpluimers on 2017/06/20
One day I need to research how to get the conversions right for this: How do I Check DHCP Lease info in terminal – Ars Technica OpenForum as I think that ipconfig getoption en0 lease_time gives me the value in a different format than date -r expects.
Also:
At T1 seconds (typically set to 0.5*lease_time) after the last successful renewal, the DHCP client attempts to renew it’s lease with the DHCP server that granted it’s current address via unicast. If unsuccessful, at T2 seconds (typically set to 0.875*lease_time) after the last renewal, the DHCP client attempts to rebind with any DHCP server via multicast.
–jeroen
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Posted in Apple, bash, Development, Mac, Mac OS X / OS X / MacOS, OS X 10.10 Yosemite, OS X 10.11 El Capitan, OS X 10.9 Mavericks, Power User, Scripting, Software Development | Leave a Comment »
URLs for Mikrotik PCC load balancing
Posted by jpluimers on 2017/06/16
PCC load balancing saved my ass; here are some link I used:
- Source: Mikrotik Layer3 Gateway Load Balancing « MikrotikUniversity
- Source: Egress filtering – Wikipedia, the free encyclopedia
- Source: Ingress filtering – Wikipedia, the free encyclopedia
- Source: Playing with the Mikrotik’s PCC | Syed Jahanzaib Personal Blog to Share Knowledge !
- Load Balancing Using PCC & RouterOS – MUM – Mikrotik
- Load Balancing using PCC connected via PPPoE with Port Forwarding – MUM – Mikrotik
- Internet Load Balancing •PCC(Per Connection Classifier) •Routing Policy •Spillover (nice examples)
- Set the PCC selector from “both addresses and ports” to “both addresses”. This way communication from and to the same IP address always hashes the same and you don’t get broken connections.
Source: PCC side effect on Mikrotik Forum – MikroTik RouterOS
–jeroen
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Posted in Development, Internet, MikroTik, Power User, RouterOS, routers, Scripting, Software Development | Leave a Comment »
The Wiert Corner - irregular stream of stuff 