Error loading: C:\Program Files\Java\jdk1.6.0_17\jre\bin\server\jvm.dll

To solve this error I created a new batch file in the FLEX3_HOME/bin directory and named it mxmlc64bit.bat with the following one line:

 ”%JAVA_HOME%\bin\java.exe” -Xmx384m -Dsun.io.useCanonCaches=false -jar “%~dp0\..\lib\mxmlc.jar” +flexlib=”%~dp0\..\frameworks” %*

 This bascially executes java to load the mxmlc.jar directly similar to what the linux script does and I assume it is also what mxmlc.exe does.

 Hope this helps. Check out my google ads.

1. Open the Start Menu
2. Look for Windows Live Messenger
3. Do not left click, instead Right Click on the icon
4. Select Properties
5. Look for Compatibility Tab
6. There is a drop down list of operating systems you can choose to which the application was compatible (or in the mode you wish it to run)
7. Select either Windows XP SP3 or Vista
8. Click Apply
9. Click OK
10. Restart the application (in this case Microsoft Live Messenger)
11. Should only show one now.

That is it. I can’t explain why this is yet, but at least you can free up some of your taskbar again.

1. Create a new VM in XenServer, and make sure the virtual disk is at least the size of the disk you will import.

2. Get UUID from virtual disk images
xe vdi-list params=all

3. Import the raw disk image file into the virtual disk image
xe vdi-import filename="raw_image.img" uuid="UUID"

4. Boot the VM. Note: You may need boot the VM off a valid bootable ISO image first so that the drive’s location path is set.

To convert from a VMware guest to XenServer
To import a VMware linux guest first convert the vmdk to img and use the “Other install media” Template in XenServer.

qemu-img convert -f vmdk vmdk_image.vmdk -O raw raw_image.img

The javascript window.onbeforeunload event can help with this.

window.onbeforeunload = some_function

Your code can be as simple as the above, but I would recommend a few additions, e.g. checking to see if the user has made any changes before you throw up a confirmation prompt. It is always annoying to make no changes, but still be prompted to save before navigating away. In order to track if changes have been made, here is a simple javascript tracking example. Of course, your pages may be much more complicated, but this will illustrate one approach.


var values = new Array('', '', '', '', '', '');
var needToConfirm = true;

// no changes - return nothing
}
}


Enjoy this bit of code, but be careful not to over use it. It can be annoying.

What you will need:

- Hauppauge HD PVR
- Elecard NWRenderer DirectShow Filter (Elecard Codec .NET SDK G4 or Streaming Plug-in)
- Windows Graph Edit (Windows Driver Devlopment Kit)
- Wowza Media Server

First, install the Hauppauage HD PVR and drivers and get a good video signal coming in to it.   Next, get a copy of the Windows Driver Development Kit and you only need to install the AV Stream Tools in order to get the graphedt.exe and related libraries.  ( “C:\WINDDK\3790.1830\tools\avstream\x86\graphedt.exe” )  Most of the instructions will be building a DirectShow Filter Graph using this tool.

Using Windows Graph Edit you can create a filter graph to expose the raw data from the HD PVR.  The raw data is an MPEG Transport Stream containing H.264 video and AAC audio.  In Graph Edit you need to add and connect in sequence the Hauppauge HD PVR Crossbar, Hauppauge HD PVR Capture Device, and Hauppauge PVR Encoder filters.  These are found under Graph > Insert Filters > WDM Streaming Crossbar Devices,  WDM Streaming Capture Devices, and WDM Streaming Encoder Devices respectivally.  Connect the crossbar device to the capture device and connect the capture device to the encoder.  You can right click on each of these to modify properties.  Especially usefully is the encoder properties page to set the H.264 and AAC settings.

You now have direct access to the MPEG Transport Stream (containing H.264 audio and AAC video).  You could use a Dump Filter to dump this directly to a file if you wanted to.  What we want to do is feed this into the Elecard NWRenderer and stream it out to the network.  You will need to install either the Elecard Codec .NET SDK G4 or the Elecard Streaming Pack.  Once you have installed these they should show up under Graph > Insert Filters > DirectShow Filters.  If for some reason you do not see these Elecard filters, you may need to register them in windows.  The filters are *.ax files in the install folder of the Elecard software.  ( “C:\Program Files\Elecard\Elecard Codec SDK G4\Bin” or “C:\Program Files\Common Files\Elecard” )  Pass each of the *.ax filenames as a parameter to regsvr32.exe.

Insert the Elecard NWRenderer filter.  Connect the output of the Hauppauge Encoder to the Input of the Elecard NWRenderer.  Click Play to run the filter graph.  Right click to view the properties of the NWRenderer.  Under Information Click the Save SDP message.  Save this file out.  You can open this file in VLC Media Player to test that it is really being sent out over the network.  We are finished using the Graph Edit program.  Leave the graph playing and streaming on the network.

Install Wowza Media Server with an MPEG-TS add-on license.  Make sure you request an MPEG-TS add-on license.  Without the MPEG-TS add-on this does not work in Wowza Media Server.  Copy the rtplive folder from “%WMSCONFIG_HOME%\examples\NativeRTPVideoStreaming\conf” to “%WMSCONFIG_HOME%\conf”.  Create an empty folder named  rtplive in “%WMSCONFIG_HOME%\applications”.  Copy the .sdp into “%WMSCONFIG_HOME%\content”. Start the Wowza service.

Now you can run “%WMSCONFIG_HOME%\examples\NativeRTPVideoStreaming\client\nativertp.html”.  Put the filename of the .sdp file as the stream name. You are now watching the video and audio being encoded from the HD PVR.  Wowza simply converts the container from mpeg transport stream to the flash compatible mp4 box.

More to come including screen shots …

Whenever the machine reboots the usb devices are assigned their device filename in non-repeatable and not well defined order so that each time /dev/video0 will probably be a different device.

So I knew that udev rules should solve the problem.  At present, there are no attributes defined for these devices that can be used in a udev rules, but the driver does create a lot of useful information in files under /sys/class/pvrusb2/.

I first tried using the rules and script found on this page: http://www.isely.net/pvrusb2/utils.html

But they did not work.  After several hours of troubleshooting and with some help, I finally found out the reason why: the /sys/class/pvrusb2/ folder and files are not yet available at the time that the udev rule is executing the program script.

To solve this problem, I’ve rewritten the script so that it will wait up to 15 seconds until these sys files are available, and then using the information, properly link each /dev/videoX device to a /dev/video_sn-XXXXXXX using the serial number of that device.

Then in MythTV I am able to use the /dev/video_sn-XXXXXXX filename which will be the exact same physical device every time.

I tried using the WAIT_FOR_SYSFS and WAIT_FOR keys in the rules file, but it also did not work for me.

If you find this information useful you might also find a useful ad on my site and click to read more about it. 

Here are the files that work for me:

/etc/udev/rules.d/99-hvr1950.rules


KERNEL=="video[0-9]*", PROGRAM="/usr/bin/udev-hvr-1950.sh %m", SYMLINK+="video_%c", OWNER="mythtv", GROUP="mythtv"


/usr/bin/udev-hvr-1950.sh


#!/bin/bash

echo unknown_$1
exit 0

1. Fresh install of mythbuntu 9.04
2. Extract and install the firmware files for HVR-1950:
   1. Download http://www.isely.net/downloads/fwextract.pl to ~/Desktop
   2. Insert the CD that came with your HVR-1950 (contains windows drivers) [assume it mounted as /media/cdrom0]
   3. cd ~/Desktop
   4. chmod u+x fwextract.pl
   5. ./fwextract.pl /media/cdrom0/Drivers/
   6. sudo copy *.fw /lib/firmware
3. Run mythtv-setup using sudo
   1. sudo mythtv-setup
   2. Capture Card Type: IVTV MPEG-2 encoder card
   3. Video device: /dev/video0
   4. Probed info: WinTV HVR-1950 Model Category 7 [pvrusb2]
4. Run mythtvfrontend
5. (if the video looks really bad in mythfrontend):
   1. Utilities/Setup
   2. Setup
   3. TV Settings
   4. Recording Profiles
   5. MPEG-2 Encoders (PVR-x50, PVR-500)
   6. for Live TV, Default, High Quality, Low Quality
      1. Change Width to 720
      2. Change Height to 480

Notes:

• To use it for digital capture instead of analog I think you need to use the DVB DTV capture card type.
• If you do not run mythtv-setup through sudo you will get an error message: “Probed info: Failed to open” and “Could not open ‘/dev/video0′ to probe its inputs.”
• If you do not extract and install the firmware files, then the HVR-1950 usb will not init.  You should get the following files extracted and copied: v4l-cx2341x-enc.fw, v4l-cx25840.fw, v4l-pvrusb2-29xxx-01.fw, v4l-pvrusb2-73xxx-01.fw
• If you try to do this on MythBuntu 8.10 you will run into the deadlock problem described in http://www.isely.net/pvrusb2/history.html and fixed in the pvrusb2-mci-20081019 release.  (I did not try to recompile the pvrusb2 driver in 8.10 because I assume it is part of the kernel and it seemed like a lot of work.  If you do and it works, let me know how.)
• My research shows that MythBuntu does not use the standalone pvrusb2 driver but uses the -in V4L version thus further complicating the compiling of an up-to-date version of pvrusb2.  I also could not figure out which packages to force upgrade in order to get the latest pvrusb2.
• Some things I did that I don’t think helped fix the problems:
  • sudo apt-get update
  • sudo apt-get dist-upgrade
  • sudo apt-get autoremove
  • sudo rmmod pvrusb2
  • sudo modprobe pvrusb2
• If you find this information useful you might also find a useful ad on my site and click to read more about it. 

References:

• http://www.mythbuntu.org/
• http://www.isely.net/pvrusb2/pvrusb2.html
• http://ubuntuforums.org/showthread.php?p=6732655#post6732655
• http://www.linuxtv.org/wiki/index.php/ATSC_USB_Devices

dmesg output should be something like this when the device is connected properly:

[ 3014.636441] usbcore: registered new interface driver pvrusb2
[ 3014.636450] pvrusb2: V4L in-tree version:Hauppauge WinTV-PVR-USB2 MPEG2 Encoder/Tuner
[ 3014.636456] pvrusb2: Debug mask is 31 (0x1f)
[ 3015.636130] usb 5-6: firmware: requesting v4l-pvrusb2-73xxx-01.fw
[ 3015.647622] pvrusb2: Device microcontroller firmware (re)loaded; it should now reset and reconnect.
[ 3015.679396] usb 5-6: USB disconnect, address 5
[ 3015.679836] pvrusb2: Device being rendered inoperable
[ 3017.432020] usb 5-6: new high speed USB device using ehci_hcd and address 6
[ 3017.573844] usb 5-6: configuration #1 chosen from 1 choice
[ 3017.670711] cx25840' 0-0044: cx25843-24 found @ 0x88 (pvrusb2_a)
[ 3017.703925] tuner' 0-0042: chip found @ 0x84 (pvrusb2_a)
[ 3017.727963] tveeprom 0-00a2: Hauppauge model 75111, rev C3E9, serial# 5371008
[ 3017.727968] tveeprom 0-00a2: MAC address is 00-0D-FE-51-F4-80
[ 3017.727972] tveeprom 0-00a2: tuner model is Philips 18271_8295 (idx 149, type 54)
[ 3017.727976] tveeprom 0-00a2: TV standards NTSC(M) ATSC/DVB Digital (eeprom 0x88)
[ 3017.727979] tveeprom 0-00a2: audio processor is CX25843 (idx 37)
[ 3017.727982] tveeprom 0-00a2: decoder processor is CX25843 (idx 30)
[ 3017.727985] tveeprom 0-00a2: has radio, has IR receiver, has IR transmitter
[ 3017.727992] pvrusb2: Supported video standard(s) reported available in hardware: PAL-M/N/Nc;NTSC-M/Mj/Mk;ATSC-8VSB/16VSB
[ 3017.727998] pvrusb2: Mapping standards mask=0x300b700 (PAL-M/N/Nc;NTSC-M/Mj/Mk;ATSC-8VSB/16VSB)
[ 3017.728016] pvrusb2: Setting up 6 unique standard(s)
[ 3017.728023] pvrusb2: Set up standard idx=0 name=PAL-M
[ 3017.728026] pvrusb2: Set up standard idx=1 name=PAL-N
[ 3017.728029] pvrusb2: Set up standard idx=2 name=PAL-Nc
[ 3017.728033] pvrusb2: Set up standard idx=3 name=NTSC-M
[ 3017.728036] pvrusb2: Set up standard idx=4 name=NTSC-Mj
[ 3017.728039] pvrusb2: Set up standard idx=5 name=NTSC-Mk
[ 3017.728042] pvrusb2: Initial video standard (determined by device type): NTSC-M
[ 3017.731049] pvrusb2: Device initialization completed successfully.
[ 3017.731131] pvrusb2: registered device video0 [mpeg]
[ 3017.731135] DVB: registering new adapter (pvrusb2-dvb)
[ 3017.757981] cx25840' 0-0044: firmware: requesting v4l-cx25840.fw
[ 3019.986050] cx25840' 0-0044: loaded v4l-cx25840.fw firmware (16382 bytes)
[ 3020.168547] tda829x 0-0042: setting tuner address to 60
[ 3020.192529] tda18271 0-0060: creating new instance
[ 3020.228545] TDA18271HD/C1 detected @ 0-0060
[ 3021.424529] tda829x 0-0042: type set to tda8295+18271
[ 3024.742477] cx25840' 0-0044: Video signal: not present
[ 3024.742482] cx25840' 0-0044: Detected format: NTSC-M
[ 3024.742485] cx25840' 0-0044: Specified standard: NTSC-M
[ 3024.742487] cx25840' 0-0044: Specified video input: Composite 7
[ 3024.742490] cx25840' 0-0044: Specified audioclock freq: 48000 Hz
[ 3024.749349] cx25840' 0-0044: Detected audio mode: mono
[ 3024.749353] cx25840' 0-0044: Detected audio standard: no detected audio standard
[ 3024.749356] cx25840' 0-0044: Audio muted: no
[ 3024.749359] cx25840' 0-0044: Audio microcontroller: detecting
[ 3024.749362] cx25840' 0-0044: Configured audio standard: automatic detection
[ 3024.749365] cx25840' 0-0044: Configured audio system: BTSC
[ 3024.749367] cx25840' 0-0044: Specified audio input: Tuner (In8)
[ 3024.749370] cx25840' 0-0044: Preferred audio mode: stereo
[ 3024.808916] cx25840' 0-0044: firmware: requesting v4l-cx25840.fw
[ 3027.024318] cx25840' 0-0044: loaded v4l-cx25840.fw firmware (16382 bytes)
[ 3029.267787] usb 5-6: firmware: requesting v4l-cx2341x-enc.fw
[ 3029.508914] cx25840' 0-0044: 0x0000 is not a valid video input!
[ 3031.787749] DVB: registering adapter 0 frontend 0 (Samsung S5H1411 QAM/8VSB Frontend)...
[ 3031.790123] tda829x 0-0042: type set to tda8295
[ 3031.828013] tda18271 0-0060: attaching existing instance


It comes with server side scripts in PHP, ASP.NET, and ASP for the upload half of the test.  But what if you want it to run on your java web container server such as tomcat or jboss?

Well, I have the solution. 

First, for the index.html file simply copy the index-asp.html and change the upload_extension line to read jsp instead of asp:

so.addVariable("upload_extension", "jsp");

Next, you will need to create an upload.jsp file alongside the upload.php and upload.asp files in the speedtest folder.

Here is the code for upload.jsp:

<%
long size = 0;// add length of request header strings
String name = "";
for(java.util.Enumeration e = request.getHeaderNames(); e.hasMoreElements();){
name = (String)e.nextElement();
String value = "";
for(java.util.Enumeration f = request.getHeaders(name); f.hasMoreElements();){
value = (String)f.nextElement();
size += name.length() + value.length() + 3;
//out.print(name+"="+value+"\n");
}
}/*
// add length of request parameter strings
name = "";
for(java.util.Enumeration e = request.getParameterNames(); e.hasMoreElements();){
name = (String)e.nextElement();
String value = "";
String[] values = request.getParameterValues(name);
for(int i = 0; i 0);
}
*/

<HBox visible="{((booleanValue1) && (booleanValue2))}" >

You will get this error message during compile:

Error: The entity name must immediately follow the ‘&’ in the entity reference.

Instead you will need to use html escape codes for these as follows:

<HBox visible="{((booleanValue1) &amp;&amp; (booleanValue2))}" >

There are several options including a FREE one. It is easy to setup and get started. Check it out!

Brought to you, not just in part, but almost in entirety through documentation from Sun on IEEE-754.

This code is a bit messy, so I’ll probably come back in a few days with a post showing a cleaner version.

; This doesn't recognize -INF or +INF
; It wouldn't be hard to add, I just figure
;    I won't see them in what I'm doing.
(defun seq-to-IEEE-754-double (seq)
  (let* ((int (seq-to-int seq))
         (s (ash int -63))
         (e (ash (logxor
                   (ash (ash int -63) 63)
                   (ash (ash int -52) 52))
                 -52))
         (f (logxor
              (ash (ash int -52) 52)
              int)))
    ;(format t "~&~64,'0b~%~b ~11,'0b ~52,'0b~%" int s e f)
    ;(format t "~&~f ~f ~f ~f~%" s e f (/ f (expt 10 (digits f))))

    (if (and (< 0 e) (< e 2047))
      (* (expt -1 s)
         (expt 2 (- e 1023))
         (+ 1 (/ f (expt 10 (digits f)))))

      (if (and (= e 0) (not (= f 0)))
        (* (expt -1 s)
           (expt 2 -1022)
           (/ f (expt 10 (digits f))))

        (if (and (= e 0) (= f 0))
          (* (expt -1 s)
             0.0)
             ; Yes, something times zero. It's a signed zero.
             ; Don't know if it matters, but it's what the docs said to do.

          'NaN)))))}}}

Original post by richard.lyman and software by Elliott Back

As a short follow-up post to the basic undo/redo functionality from the other day, here’s a really simple approach to adding more advanced kinds of undo/redo.

In the same place you added the ‘addBasicUndoItem’ method from the previous post, you could add this method:

public function addAdvancedUndoItem( o : Object ) : void {
	_redo = [];
	_undo.push( o );
	verifyUndoRedo();
}

Yup. Some simple steps:

1. The class managing undo/redo admits that it has no clue about more complex undo/redo situations
2. Hand the definition of complex undo/redo situations over to the relevant class.
3. Give the relevant class a simple method to throw the undo/redo item on the managing stack.

In other words, if another class ‘ClassA’ has a method named ‘complexAction’, then that class would probably be best suited to defining the undo/redo functionality associated with the ‘complexAction’.

public class ClassA{
...
    public function complexAction() : void {
        ...
        addAdvancedUndoItem({
            undo:function():Object{ /* Some complex functionality */ return this; },
            redo:function():Object{ /* Some complex functionality */ return this; }
        });
        ...
    }
...
}

Again, not too bad.

Original post by richard.lyman and software by Elliott Back

I was hoping that it wouldn’t take too much code (and that it’d look cool since it is ActionScript), and I was pleasantly surprised:

private var _undo : Array;
private var _redo : Array;
private function verifyUndoRedo() : void {
	mainMenuData..menuitem.(attribute('data')=='undo').@enabled = _undo.length > 0;
	mainMenuData..menuitem.(attribute('data')=='redo').@enabled = _redo.length > 0;
}
public function addBasicUndoItem( s : Object, o : *, n : * ) : void {
	_redo = [];
	_undo.push( {
		undo:function():Object{ for( var p : * in o ){ s[p] = o[p]; }; return this; },
		redo:function():Object{ for( var p : * in n ){ s[p] = n[p]; }; return this; }
	} );
	verifyUndoRedo();
}
private function undo() : void { if( _undo.length > 0 ){ _redo.push( _undo.pop().undo() ); } verifyUndoRedo(); }
private function redo() : void { if( _redo.length > 0 ){ _undo.push( _redo.pop().redo() ); } verifyUndoRedo(); }

‘Course you’ll want to make sure your _undo and _redo Arrays are initialized to [] and that you’re listening to the Ctrl-Z and Ctrl-Y KeyboardEvents…

public function onInvoke( invokeEvent : InvokeEvent ) : void {
	stage.addEventListener( KeyboardEvent.KEY_DOWN, handleKeyDown );
}

private function handleKeyDown( e : KeyboardEvent ) : void {
	if( e.charCode == 122 && e.keyCode == 90 && e.ctrlKey ){
		undo();
	}else if( e.charCode == 121 && e.keyCode == 89 && e.ctrlKey ){
		redo();
	}
}

… and you’ll probably want to setup an easy to manage Menu…

<mx:XML format="e4x" id="mainMenuData" xmlns="" >
	<root>
		<menuitem label="File">
			<menuitem label="Exit" data="exit" />
		</menuitem>
		<menuitem label="Edit">
			<menuitem label="Undo" data="undo" enabled="false" />
			<menuitem label="Redo" data="redo" enabled="false" />
		</menuitem>
	</root>
</mx:XML>
<mx:MenuBar width="100%" dataProvider="{mainMenuData}" labelField="@label" itemClick="handleMenuSelection(event)" showRoot="false" />

… with it’s related handleMenuSelection method…

private function handleMenuSelection( e : MenuEvent ) : void {
	if( e.item.@data == "exit" ){
		NativeApplication.nativeApplication.exit();
	}else if( e.item.@data == "undo" ){
		undo();
	}else if( e.item.@data == "redo" ){
		redo();
	}
}

… like I said, not too bad.

Using it isn’t too taxing either. Assuming that you wanted to undo/redo the x and y position of an item after it had been dragged to a new position…

// Some code before the drag that set's the prevx and prevy var's to the previous x and y...
addBasicUndoItem( this, {x:prevx,y:prevy}, {x:x,y:y} )

Original post by richard.lyman and software by Elliott Back

I really don’t think that I would have realized that Home Depot has cool little converters, wires, devices, and assorted odds-n-ends related to electronics - but they do. I’ve been looking for a USB card reader for a while and while WalMart and Radio Shack carry products that fit that bill they’re usually expensive. Home Depot had one for $14.

They claim that their device reads 19 different types of cards… I only care about one, but those who tinker always want solutions that have more options than they really need. :-)

Original post by richard.lyman and software by Elliott Back

So. I know the title is not the greatest. Sorry. :-)

Here’s what I’m trying to do in GVIM:

1. Navigate from the current buffer to another buffer (by selecting a word that can be interpreted as the name of the file I want to go to).
2. Keep a list of where I’ve been.
3. Navigate back to previous files - in reverse order of when I saw them.
4. Use simple controls that make sense in navigating forward and backward.

Yeah… that’s why the title was a bit of a stretch.

In the end I used C-LeftMouse (Control + Left click) to navigate forward, and C-RightMouse to navigate backward. I know it’s a bit backward, but it follows navigating forward with the left mouse when you’re in a web page. The code I put in my _vimrc (the underscore comes from using GVIM on msWin) is shown below:

let s:bufNameList = []

function PushFileJump()
	if len(s:bufNameList) == 0
		let prev = bufname("#")
		call add(s:bufNameList, strpart( prev, 0, stridx(prev,".") ) )
	endif
	call add(s:bufNameList, getreg('z') )
endfunction

function PopFileJump()
	if len(s:bufNameList) > 0
		call remove(s:bufNameList,-1)
		call setreg( 'z', get(s:bufNameList,-1) )
	endif
endfunction

map! <C-LeftMouse> <LeftMouse><Esc>b"zye:b<Space><C-r>z.<C-q>	<CR>:call PushFileJump()<CR>
map <C-LeftMouse> <LeftMouse>b"zye:b<Space><C-r>z.<C-q>	<CR>:call PushFileJump()<CR>
map! <C-RightMouse>  <Esc>:call PopFileJump()<CR>:b<Space><C-r>z.<C-q>	<CR>
map <C-RightMouse>  :call PopFileJump()<CR>:b<Space><C-r>z.<C-q>	<CR>

To explain a bit, I used a List, and carried the file I want to go to in the z register. C-LeftMouse copies the word I clicked on into the z register, navigates to that word as a file, and then calls PushFileJump to add the new file into the List.

The only reason why PushFileJump is a bit more complex than that is because I need to add the previous buffers name to the List if it was the file I started navigating at.

C-RightMouse is simpler. It calls PopFileJump, which removes the current buffer name and sets the z register to the last buffer name in the List. The rest of the mapped command for C-RightMouse finishes using the z register to navigate to the previously seen file.

This should allow me to quickly navigate forward and backward - but it throws away anything I back over… so there is still some room for improvement.

Original post by richard.lyman and software by Elliott Back

The Ctrl-q is used in place of the Ctrl-v, since GVim on Windows has Ctrl-V mapped to the paste action. Use of the command ‘ye’ is essential to get the word under the cursor, in place of the command ‘yw’, since the ‘w’ will append whitespace if it can. Please note that there is an actual <Tab> character in these commands, before the final <CR>. This allows for auto completion of the word under the cursor, in case there is more than one file with a similar name. Of course, the word you’re wanting to use is placed in the Z buffer.

map! <F4> <Esc>b"zye:b<Space><C-r>z.<C-q>	<CR>
map <F4> b"zye:b<Space><C-r>z.<C-q>	<CR>

Original post by richard.lyman and software by Elliott Back

Simply googling for the phrase flex RangeError swapChildrenAt returns enough reason to follow this advice. Here’s some pseudo-code that does work for swapping the depth of two children, A and B:

1. A needs to be at a depth above B
   • If not, then switch references to A and B.
2. Remember the depths of A and B
3. Remove A
4. Remove B
5. Add A to the level where B was
6. Add B to the level where A was

As a side note: If you’re removing these children from inside either A or B, you’ll want to keep a reference to the parent in a local variable since you’ll lose it as soon as you remove A and B.

Original post by richard.lyman and software by Elliott Back