Monday, 10 September 2012

How to select a JSON object with a colon in the key

item = Object
  1. categoryArray[6]
  2. commentsArray[1]
  3. content:encodedArray[1]
  4. dc:creatorArray[1]
    1. 0"Jordan Crook"
    2. length1

To access 'dc:creator' simply use:


Console.trace() to debug javascript

The following is taken from the firebug wiki:

Console.trace() prints an interactive stack trace of JavaScript execution at the point where it is called.
The stack trace details the functions on the stack, as well as the values that were passed as arguments to each function. You can click each function to take you to its source in the Script tab, and click each argument value to inspect it in the DOM or HTML tabs.

We have all been there struggling to fix javascript bugs - we know where they break, but take ages working out what called that function causing in to break. Console.trace() allows us to view the full stacktrace and more easily debug our code.

Post your own experiences in the comments below!

Friday, 7 September 2012

Using Chrome’s Task Manager to Kill Broken Tabs

If you encounter a situation where one of the tabs in Google Chrome is causing you problems and won’t close, you don’t have to close the browser to get rid of your troubles. Chrome comes with its own Task Manager that shows you how much of available resources are used by any open pages and used plug-ins. It also allows you to end process on any open tab without having to shutdown the browser.

1. While in Google Chrome, use the following keyboard shortcut: Shift+Esc.
2. The Task Manager will appear. Select the desired page that needs to be closed.

3. Click the End Process button.

Wednesday, 5 September 2012

Batch Cheat Sheet

I dislike batch as a language - I much prefer shell scripts, but for when needs must here is a cheat sheet.

Enter your experiences with batch in the comments and I'll do my best to answer any questions.

To view the detailed help for each command:
myCommand /?

To accept user input as a variable:
set /p Input=Enter some text:
Later you can use that variable as argument to a command:
myCommand %Input%

To stop the console from closing after running a batch script:

Enter PAUSE at the end of your batch script. This waits for user input and will close when you press any key.


CACLS           Change file permissions
CALL            Call one batch program from another
CD              Change Directory - move to a specific Folder
CHANGE          Change Terminal Server Session properties
CHKDSK          Check Disk - check and repair disk problems
CHKNTFS                 Check the NTFS file system
CHOICE          Accept keyboard input to a batch file
CIPHER          Encrypt or Decrypt files/foldersCleanMgr                Automated cleanup of Temp files, recycle bin
CLEARMEM                Clear memory leaks
CLIP            Copy STDIN to the Windows clipboard.
CLS             Clear the screen
CLUSTER                 Windows Clustering
CMD             Start a new CMD shell
COLOR           Change colours of the CMD window
COMP            Compare the contents of two files or sets of files
COMPACT                 Compress files or folders on an NTFS partition
COMPRESS        Compress individual files on an NTFS partition
CON2PRT                 Connect or disconnect a Printer
CONVERT                 Convert a FAT drive to NTFS.
COPY            Copy one or more files to another location
CSVDE           Import or Export Active Directory data
DATE            Display or set the dateDcomcnfg                DCOM Configuration Utility
DEFRAG          Defragment hard drive
DEL             Delete one or more files
DELPROF                 Delete NT user profiles
DELTREE                 Delete a folder and all subfoldersDevCon          Device Manager Command Line Utility
DIR             Display a list of files and folders
DIRUSE          Display disk usage
DISKCOMP        Compare the contents of two floppy disks
DISKCOPY        Copy the contents of one floppy disk to another
DNSSTAT                 DNS Statistics
DOSKEY          Edit command line, recall commands, and create macros
DSADD           Add user (computer, group..) to active directoryDSQUERY List items in active directory
DSMOD           Modify user (computer, group..) in active directory
ECHO            Display message on screen
ENDLOCAL        End localisation of environment changes in a batch file
ERASE           Delete one or more files
EXIT            Quit the CMD shell
EXPAND          Uncompress files
EXTRACT                 Uncompress CAB files
FC              Compare two files
FDISK           Disk Format and partition
FIND            Search for a text string in a file
FINDSTR         Search for strings in files
FOR             Conditionally perform a command several times
FORFILES                Batch process multiple files
FORMAT          Format a disk
FREEDISK                Check free disk space (in bytes)
FSUTIL          File and Volume utilities
FTP             File Transfer Protocol
FTYPE           Display or modify file types used in file extension associations
GLOBAL          Display membership of global groups
GOTO            Direct a batch program to jump to a labelled line
HELP            Online Help
HFNETCHK        Network Security Hotfix Checker
IF              Conditionally perform a command
IFMEMBER                Is the current user in an NT Workgroup
INSTSRV                 Install an NT Service
IPCONFIG                Configure IP
KILL            Remove a program from memory
LABEL           Edit a disk label
LOCAL           Display membership of local groups
LOGEVENT        Write text to the NT event viewer.
LOGOFF          Log a user off
LOGTIME                 Log the date and time in a file
MAPISEND        Send email from the command line
MEM             Display memory usage
MD              Create new folders
MODE            Configure a system device
MORE            Display output, one screen at a time
MOUNTVOL        Manage a volume mount point
MOVE            Move files from one folder to another
MOVEUSER        Move a user from one domain to another
MSG             Send a message
MSIEXEC                 Microsoft Windows Installer
MSINFO          Windows NT diagnostics
MUNGE           Find and Replace text within file(s)
MV              Copy in-use files
NET             Manage network resources
NETDOM          Domain Manager
NETSH           Configure network protocols
NETSVC          Command-line Service Controller
NBTSTAT         Display networking statistics (NetBIOS over TCP/IP)
NETSTAT         Display networking statistics (TCP/IP)
NOW             Display the current Date and Time
NSLOOKUP        Name server lookup
NTBACKUP        Backup folders to tape
NTRIGHTS        Edit NT user account rights
PATH            Display or set a search path for executable files
PATHPING                IP trace utility
PAUSE           Suspend processing of a batch file and display a message
PERMS           Show permissions for a user
PERFMON                 Performance Monitor
PING            Test a network connection
POPD            Restore the previous value of the current directory saved by PUSHD
PORTQRY                 Display the status of ports and services
PRINT           Print a text file
PRNCNFG                 Display, configure or rename a printer
PRNMNGR                 Add, delete, list printers set the default printer
PROMPT          Change the command prompt
PUSHD           Save and then change the current directory
QGREP           Search file(s) for lines that match a given pattern.
RASDIAL                 Manage RAS connections
RASPHONE        Manage RAS connections
RECOVER                 Recover a damaged file from a defective disk.
REG             Read, Set or Delete registry keys and values
REGEDIT                 Import or export registry settings
REGSVR32        Register or unregister a DLL
REGINI          Change Registry Permissions
REM             Record comments (remarks) in a batch file
REN             Rename a file or files.
REPLACE                 Replace or update one file with another
RD              Delete folder(s)
RDISK           Create a Recovery Disk
RMTSHARE        Share a folder or a printer
ROBOCOPY        Robust File and Folder Copy
ROUTE           Manipulate network routing tables
RUNAS           Execute a program under a different user account
RUNDLL32                Run a DLL command (add/remove print connections)
SC Service      Control
SCHTASKS        Create or Edit Scheduled Tasks
SCLIST          Display NT Services
ScriptIt                Control GUI applications
SET             Display, set, or remove Windows NT environment variables
SETLOCAL        Begin localisation of environment changes in a batch file
SETX            Set environment variables permanently
SHARE           List or edit a file share or print share
SHIFT           Shift the position of replaceable parameters in a batch file
SHORTCUT        Create a windows shortcut (.LNK file)
SHOWGRPS        List the NT Workgroups a user is in
SHOWMBRS        List the members of an NT Workgroup
SHUTDOWN        Shutdown the computer
SHUTGUI                 Shutdown the computer
SLEEP           Wait for x seconds
SOON            Schedule a command to run in the near future
SORT            Sort input
START           Start a separate window to run a specified program or command
SU              Switch User
SUBINACL        Edit file and folder Permissions, Ownership and Domain
SUBST           Associate a path with a drive letter
TASKLIST                List running applications and services
TIME            Display or set the system time
TIMEOUT                 Delay processing of a batch file
TITLE           Set the window title for a CMD.EXE session
TOUCH           Change file timestamps
TRACERT                 Trace route to a remote host
TREE            Graphical display of folder structure
TYPE            Display the contents of a text file
USRSTAT                 List domain usernames and last login
VER             Display version information
VERIFY          Verify that files have been saved
VOL             Display a disk label
WHERE           Locate and display files in a directory tree
WHOAMI          Output the current UserName and domain
WINMSD          Windows NT Diagnostics
WINMSDP                 Windows NT Diagnostics IIWMIC WMI Command
XCACLS          Change file permissions
XCOPY           Copy files and folders