Wednesday, August 30, 2017

Fix for xcrun: error: invalid active developer path after updating your mac OS to Sierra

If you are geting the following error with Git or any other tools while running it on from your terminal {code} xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun. {code} using the following command to fix it : {code} xcode-select --install {code}

Friday, March 3, 2017

Git Cheat Sheet

A. To List your local branchs :
  •   git branch

B. How to get or fetch a remote  Branch 
   You first need to fetch and check out the remote branc
  •    git fetch remote remote_branch_name (eg :  git fetch origin story2525/mytest_remote_branch)
  • git checkout remote_branch_name

C. How to delete a  Branch both locally and remotely:  

1. Delete the  remote branch   
  •   git push origin :branch_name or
  •   git push origin --delete branch_name

2. Delete a local branch
  •   git branch -d branch_name   (use -D if your branch hasn't been fully merge yet)         

D. How to rename your remote Branch : 

1. Rename branch locally
  • git branch -m old_branch new_branch

2. Delete the old remote branch   
  •   git push origin :old_branch            

3.  Push the new Branch  and update the upstream to point it to the new remote branch.
  •  git push --set-upstream origin new_branch


Sunday, December 18, 2016

How to check if the given string is palindrome (Recursive vs Non-recursive )

palindrome is a word, phrase, number, or other sequence of characters which reads the same backward or forward, such as "level" or "kayak" or  "amanaplanacanalpanama" 

Following is the program to check if the given string is a palindrome.  


public class PalindromeClient {

    public static boolean isPalendrome (String s) {

        if(s== null) {
            throw new RuntimeException("null value passed");

        int n = s.length();
        if(n==1) return true;
        else {

            for (int i=0; i < n/2 ; i++) {
                if(s.charAt(i)!=s.charAt(n-i-1)) {
                    return false;
        return true;

    public static boolean isPalendromeRecurrsive (String s) {

        if (s.length()<2) { return true;}
        else if (s.charAt(0)==s.charAt(s.length()-1)) {
            return isPalendrome(s.substring(1, s.length()-1));
        else return false;


    public static void main(String[] args) {
        System.out.println(isPalendrome("jptt aefa afdaf"));

        System.out.println(isPalendromeRecurrsive("jptt aefa afdaf"));


Wednesday, June 19, 2013

Replace Line Break and Spaces on Text Area using java script !

A simple way to replace line break and spaces on a text area content can be done simply by replacing the line break value and the space value with the corresponding html tag as following .

function replaceLineBreaksAndSpaces(textValue) {
   textValue = replaceSpaceCharacter(replaceLineBreak(textValue));
   return textValue;
function replaceLineBreak(textValue) {

    textValue = textValue.replace(/\r?\n/g, ' 
<br />');
    return textValue;


function replaceSpaceCharacter(textValue) {

    textValue = textValue.replace(/  /g, ' &nbsp;');
    return textValue;


Friday, November 16, 2012

Java Script function to Convert your local Date to UTC format Date

There might be a case that you might need to save date on UTC format while the user input date might be regional date time format. The following function converts the date on the UI layers itself  from the input reginonal date to UTC Date.

function convertToUTCFormat(date){
var year = "" + date.getUTCFullYear();
var month = "" + (date.getUTCMonth() + 1);if (month.length == 1) { month = "0" + month; } //months range is [0-11]
var day = "" + date.getUTCDate(); if (day.length == 1) { day = "0" + day; }
var hour = "" + date.getUTCHours();if (hour.length == 1) { hour = "0" + hour; }
var minute = "" + date.getUTCMinutes(); if (minute.length == 1)  minute = "0" + minute; } var second = "" + date.getUTCSeconds(); if (second.length == 1) { second = "0" + second; }

return year + "-" + month + "-" + day + " " + hour + ":" + minute + ":" + second+":000"; }


Tuesday, October 2, 2012

java.lang.IllegalStateException: Imbalanced frame stack! (exit() called too many times) !

If you started using SpringSource Insight,It's highly recommended to increase the memory of the tc Runtime Instance to more than what your application requires on its own . The following is the exception you might see in case there is not enough memory.
type Exception report

descriptionThe server encountered an internal error () that prevented it from fulfilling this request.
java.lang.IllegalStateException: Imbalanced frame stack! (exit() called too many times)

note The full stack trace of the root cause is available in the VMware vFabric tc Runtime 2.6.2.RELEASE/7.0.22.A.RELEASE logs.

There are few options to resolve this issue.
  1. Increase the max heap
    For example: -Xmx512m
  2. or max PermGen size JVM option.
    For example: -XX:MaxPermSize=256m
  3. Increase the Spring insight max frame
    For example: -Dinsight-max-frames=6000
OR you can have all of the above JVM parameters.


Wednesday, April 11, 2012

Get the current Value from a TextField in extJS !

Get the Current(or the latest) Value from the textField:

var currentValue= Ext.getCmp('expName').value;

Get the value that was initially loaded (or initialized)
var loadedValue=Ext.getCmp('expName').getValue();

On a separate note, You can define a label with a html message into it.
For example :
   html:''Duplicate value detected !', hidden:true 

You can make it visible or hide it with setVisible method as following.


Friday, November 18, 2011

Get the the difference between two dates in MS SQL

The DATEDIFF() function returns the difference between two dates
Syntax: DATEDIFF ( datepart , startdate , enddate )

Following is an example for the DateDiff()
DECLARE @startdate datetime ='2011-11-14 02:00:06.957';
DECLARE @enddate datetime = '2011-11-16 05:00:15.490';
SELECT DATEDIFF(day, @startdate, @enddate) as dayDifference,DATEDIFF(HOUR, @startdate, @enddate)as hourDifference

dayDifference hourDifference
2 51

Similarly the following are the available datepart Options on the DateDiff() Function.

year(or yy or yyyy)
quarter(or qq or q)
month (or mm or m )
dayofyear(or dy or y )
day (or dd, d )
week(or wk or ww)

hour(or hh)
minute(or mi or n)
second(or ss or s )
millisecond(or ms)
microsecond(or mcs)
nanosecond(or ns)
TZoffset(or tz)
ISO_WEEK(or isowk or isoww)


Get the Row Numbers as a separate column on MS SQL Query

I was trying to execute a new query where I need the Row number as a new column on the result itself. I used the SQL Function ROW_NUMBER() to get the row number.
Following query gives the Report Path with the HitCount along with the added Row Number.

select ROW_NUMBER() OVER(ORDER BY count(ReportPath) DESC) AS 'Row Number', ReportPath,count(ReportPath) as HitCount
FROM [ReportServer].[dbo].[ExecutionLog2]
Group by ReportPath
Order by HitCount desc

Cheers !

Friday, July 8, 2011

Get the Disk Usage Statistics from the WinDirStat !

WinDirStat is an opensource tool to identify howmuch of disk space you are using on your wondow box. It shows disk, file and directory sizes in a treelist as well as graphically in a treemap, much like KDirStat or SequoiaView.

Once i started using it, i feel like life would have been very hard without it.
Why don't you try it yourself.

You can download the tool from



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