Posted by jpluimers on 2020/06/02
I hardly do this, so I tend to forget that unset -f functionname deletes a function and unset variablename or unset -v variablename deletes a variable.
From:
I have done this:bash $ z() { echo ‘hello world’; }How do I get rid of it?
Source: [WayBack] How do I delete a Bash function? – Stack Overflow
Reference: [WayBack] unset Man Page – Bash – SS64.com
–jeroen
Posted in *nix, *nix-tools, bash, bash, Development, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2020/06/01
Cool: [WayBack] GitHub – kzahel/web-server-chrome: An HTTP Web Server for Chrome (chrome.sockets API)
This allows you to develop HTTP applications that live in Chrome:
[Archive.is1/Archive.is2] Web Server for Chrome – Chrome Web Store: A Web Server for Chrome, serves web pages from a local folder over the network, using HTTP. Runs offline.
Of course you could to python -m SimpleHTTPServer 8888 or python -m http.server 8888, but this runs within chrome and can be used from inside JavaScript projects.
Features
- serve local files
- configure listening port
- configure listening interface (e.g. localhost or all interfaces)
- custom http handlers possible
- websocket support available
- works nice with chrome.runtime.onSuspend
- options for autostart, start in background, etc etc.
- handles range requests, HEAD, etc
- options for CORS
- optional PUT, DELETE request (for upload files)
- sets MIME types
- can render directory listing
- See relevant options: https://github.com/kzahel/web-server-chrome/blob/master/polymer-ui/options.js
Via [WayBack] This is super useful: A# web #server that runs in #Chrome! Makes it super easy to do local web dev without the hassle of setting up a complex back end s… – Jason Mayes – Google+
–jeroen
Posted in Chrome, Development, Google, JavaScript/ECMAScript, Power User, Scripting, Software Development, Web Development | Leave a Comment »
Posted by jpluimers on 2020/05/26
Not yet structured logging, but it brings more structure to your console.log() output:
There is more to debugging JavaScript than console.log to output values. It might seem obvious I’m going to pimp the debugger, but…
Via: [WayBack] Really useful article for #JavaScript developers: Going beyond #console.log for #debugging and #logging. Some gold i nthis article that may just save yo… – Jason Mayes – Google+
–jeroen
Posted in Development, JavaScript/ECMAScript, Scripting, Software Development, Web Development | Leave a Comment »
Posted by jpluimers on 2020/05/25
Sometimes an NTFS shrink still fails, even though you use the built in Windows defragmentation tools, of SysInternals contig tool.
The best you can do is to follow the steps in:
diskmgmt.msc to try shrinking the disk, then often it is already in the error message: “You can’t shrink a volume beyond the point where any unremoveable files are located see the defrag event in application log for detailed information about the operation when it has completed.”eventvwr.exe and look at the Windows Logs for the most recent Application entries that has Source set to defragThose defrag entries usually tell about the last file that could not be moved.
You can use
wevtutillto query events on the commandline.Note that contrary to [WayBack] WEVTUTIL – Windows CMD – SS64.com documentation, the option
/rdcannot be expanded to/reversedirection, as you will get an error “invalid option reversedirection” – Google Search.For querying the above
defragevent, use this command line (replace/format:XMLwith/format:textfor more readable but also more verbose output):
wevtutil query-events Application /count:2 /format:XML /rd:true /query:"*[System[(EventID=259)]]"
On Windows 10, this is often caused by “System Protection” which locks files under C:\Recovery, but I have also seen $BITMAP, $MFT and $DATA entries.
To view which drives are currently used for system protection (this opens the “System Properties” dialog focussed on the “System Protection” tab):
SystemPropertiesProtection.exe
To disable it for one drive:
Disable-ComputerRestore -Drive "C:"
To enable it for one drive:
Enable-ComputerRestore -Drive "C:"
There seems to be no easy one-command PowerShell way to view the drives have ComputerRestore enabled, as this does not show drive letters:
PowerShell Get-ComputerRestorePoint ^| Format-List
The above gives more detailed output than a plain PowerShell Get-ComputerRestorePoint
PowerShell does not have a built-in option to delete restore points, but vssadmin has, but calls them “shadows”.
First list them:
vssadmin list shadows
Then delete them (but be aware this will not prompt for confirmation because of the /quiet):
vssadmin delete shadows /for=C: /quiet
You can also delete them for all drives (this will not prompt for confirmation either):
vssadmin delete shadows /all /quiet
Stopping the volume shadow copy service:
net stop vss
Hibernation:
powercfg.exe /hibernate off
powercfg.exe /hibernate on
Page file:
wmic pagefile list /format:list
AllocatedBaseSize=2944
CurrentUsage=0
Description=C:\pagefile.sys
InstallDate=20181018215808.683376+120
Name=C:\pagefile.sys
PeakUsage=0
Status=
TempPageFile=FALSE
wmic computersystem where name="%computername%" get AutomaticManagedPagefile
AutomaticManagedPagefile
TRUE
wmic computersystem where name="%computername%" set AutomaticManagedPagefile=False
Updating property(s) of '\\MYCOMPUTER\ROOT\CIMV2:Win32_ComputerSystem.Name="LAPTOPUW08"'
Property(s) update successful.
wmic computersystem where name="%computername%" get AutomaticManagedPagefile
AutomaticManagedPagefile
FALSE
wmic.exe pagefileset where name="C:\\pagefile.sys" delete
Deleting instance \\MYCOMPUTER\ROOT\CIMV2:Win32_PageFileSetting.Name="C:\\pagefile.sys"
Instance deletion successful.Sometimes the deletion does not work (see below for workaround):
wmic pagefile list /format:list
AllocatedBaseSize=2944
CurrentUsage=0
Description=C:\pagefile.sys
InstallDate=20181018215808.683376+120
Name=C:\pagefile.sys
PeakUsage=0
Status=
TempPageFile=FALSE
Do not do this:
wmic pagefile delete
Deleting instance \\MYCOMPUTER\ROOT\CIMV2:Win32_PageFileUsage.Name="C:\\pagefile.sys"
ERROR:
Description = Provider is not capable of the attempted operation
wmic pagefileset set name="c:\\pagefile.sys",InitialSize=0,MaximumSize=0
No Instance(s) Available.
Sometimes it still fails, so then you have to use the UI:
SystemPropertiesAdvanced.exePerformance, click on SettingsAdvanced tabVirtual memory, click the Change buttonAutomatically manage page file size for all drives is disabledNo paging file is selectedSet buttonOK buttons to fully leave the Advanced System Properties dialog.After resizing the disk, reverse the steps:
SystemPropertiesAdvanced.exePerformance, click on SettingsAdvanced tabVirtual memory, click the Change buttonAutomatically manage page file size for all drives is enabledOK buttons to fully leave the Advanced System Properties dialog.Sometimes the file blocking the resize is the NTFS "\$BitMap::$DATA", which few defragmentation tools can move as it is the MFT Bitmap.
–jeroen
Posted in CommandLine, Console (command prompt window), Development, Power User, PowerShell, PowerShell, Scripting, Software Development, Windows | Leave a Comment »
Posted by jpluimers on 2020/05/21
Almost 20 years old, but still a very nice read [Archive.is] David Korn Tells All – Slashdot.
Another funny story involving David Korn during the not-so open source times of Microsoft late last century: [WayBack] Korn Shell Story
–jeroen
Posted in *nix, *nix-tools, bash, bash, Development, History, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2020/05/14
Back in the days, framing stuff from other sites would just work. Nowadays, often they don’t because of a variety of reasons, often the site not wanting to be embedded, which is OK with me.
But it pays knowing what they do and how they do it, to ensure it is not an accidental setting of the address bar URL to the wrong value like in
if(top != window) { top.location = window.location }
So here are some links for me to dig deeper when I encounter framing issues again:
[WayBack] Headers to block iframe loading
My basic idea for a workaround is to go through a proxy.
It looks like others had this idea too, so some links future reading via cors proxy – Google Search:
–jeroen
Posted in Development, JavaScript/ECMAScript, JSFiddle, Scripting, Software Development, Web Development | Leave a Comment »
Posted by jpluimers on 2020/05/13
A cool [WayBack] 108 byte CSS Layout Debugger · GitHub (and sligtly different versions) that makes your page look like this:
[].forEach.call($$("*"),function(a){a.style.outline="1px solid #"+(~~(Math.random()*(1<<24))).toString(16)})
–jeroen
Posted in CSS, Development, JavaScript/ECMAScript, Scripting, Software Development, Web Development | Leave a Comment »
Posted by jpluimers on 2020/05/13
Though the shirt is not available on Amazon [WayBack] any more, still – after 25 years – so many recruiters still get it wrong.
Not just recruiters, so: [WayBack] Why is JavaScript called JavaScript, since it has nothing to do with Java? – Stack Overflow, thanks to CMS [WayBack]:
From an interview made to its creator Brendan Eich:
InfoWorld: As I understand it, JavaScript started out as Mocha, then became LiveScript and then became JavaScript when Netscape and Sun got together. But it actually has nothing to do with Java or not much to do with it, correct?
Eich: That’s right. It was all within six months from May till December (1995) that it was Mocha and then LiveScript. And then in early December, Netscape and Sun did a license agreement and it became JavaScript. And the idea was to make it a complementary scripting language to go with Java, with the compiled language.
he continues on the relation of ECMAScript based languages:
JavaScript, was originally named Mocha, later it was renamed to LiveScript, and then to JavaScript.
The LiveScript to JavaScript name change came because Netscape and Sun did a license agreement.
The language was then submitted for standarization to the ECMA International Organization. By that time, Netscape didn’t allow the use of the “JavaScript” name, so the standarized language is named ECMAScript.
JavaScript isn’t actually an open name. Now it’s a trademark of Sun (now Oracle).
There still a lot of confusion, some people still think that JavaScript, JScript, and ECMAScript are three different languages.
ECMAScript is the “standards” name for the language.
JavaScript is technically a “dialect” of ECMAScript, the Mozilla Foundation can use “JavaScript” as the name of their implementations (currently present on the Rhino and SpiderMonkey engines).
In the early days, Microsoft decided also to do what Netscape was doing on their own browser, and they developed JScript, which is also an ECMAScript dialect, but was named in this way to avoid trademark issues.
–jeroen
via: [WayBack] Does it bug you when people say Java when they actually mean JavaScript? https://www.amazon.com/dp/B06Y3XK69B – Jeroen Wiert Pluimers – Google+
Posted in Development, History, Java, Java Platform, JavaScript/ECMAScript, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2020/05/12
[WayBack] Insomnia REST Client A powerful REST API Client with cookie management, environment variables, code generation, and authentication for Mac, Window, and Linux.
Source code at [WayBack] GitHub – getinsomnia/insomnia: The most intuitive cross-platform REST API Client 😴.
Via: [WayBack] Paw is nice – The Isoblog.
–jeroen
Posted in Communications Development, Development, HTTP, Internet protocol suite, JavaScript/ECMAScript, JSON, REST, Scripting, Software Development, TCP, Web Development | Leave a Comment »
Posted by jpluimers on 2020/05/12
For my reading list: Bash Notes for Professionals book
Download: [WayBack] BashNotesForProfessionals.pdf
Via: [WayBack] Bash Notes for Professionals – a book compiled from Stack Overflow Documentation released under Creative Commons BY-SA – ThisIsWhyICode – Google+
–jeroen
Posted in *nix, *nix-tools, bash, bash, Development, Power User, Scripting, Software Development | Leave a Comment »
The Wiert Corner - irregular stream of stuff 