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.  



package com.mytech.today;


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("levvel"));
        System.out.println(isPalendrome("manaplanacanalpanama"));
        System.out.println(isPalendrome("a"));
        System.out.println(isPalendrome("jptt aefa afdaf"));

        System.out.println(isPalendromeRecurrsive("levvel"));
        System.out.println(isPalendromeRecurrsive("manaplanacanalpanama"));
        System.out.println(isPalendromeRecurrsive("a"));
        System.out.println(isPalendromeRecurrsive("jptt aefa afdaf"));
    }
}

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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;
}

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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"; }

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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
message

descriptionThe server encountered an internal error () that prevented it from fulfilling this request.
exception
java.lang.IllegalStateException: Imbalanced frame stack! (exit() called too many times)
com.springsource.insight.intercept.trace.ThreadLocalFrameBuilder.exit(ThreadLocalFrameBuilder.java:61)
com.springsource.insight.collection.DefaultOperationCollector.exit(DefaultOperationCollector.java:111)
com.springsource.insight.collection.DefaultOperationCollector.exitAbnormal(DefaultOperationCollector.java:85)
com.springsource.insight.plugin.annotation.InsightOperationAnnotationCollectionAspect.ajc$afterThrowing$com_springsource_insight_plugin_annotation_InsightOperationAnnotationCollectionAspect$3$5840edd2(InsightOperationAnnotationCollectionAspect.aj:50)
com.concur.midtier.webservices.xmlhttp.servlets.ReqRespMessageListener.service(ReqRespMessageListener.java:165)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)


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.

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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 :
  {xtype:'label', 
   id:'duplicate_warning_msg',
   html:''Duplicate value detected !', hidden:true 
   }

You can make it visible or hide it with setVisible method as following.
Ext.getCmp('duplicate_warning_msg').setVisible(true);

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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
Output

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)


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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 !
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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 http://windirstat.info/

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Wednesday, June 29, 2011

How to parse multi value parameter from SSRS Report !

While writing an SSRS Report, I had to parse a multivalued parameter and stored it on a temp table. After some googling i came up with the following solution. @id is the multi valued parameter that need to be parsed. Following is the sample code that you can used to parse and put the values on a temp table.


-- @uid is the parameter. Lets define the parameter for testing.

declare @uid as nvarchar(200)
set @uid='u01052901,u01052789,u01052897,u0105345,u08023432,u0234324,u23479879'

create table #TempIDTable (
slice varchar(50))
declare @index1 int
declare @u_id nvarchar(4000)
set @index1 = 1
if @uid is null
set @index1 = 0
while @index1 !=0
begin
set @index1 = charindex(',',@uid)
if @index1 !=0
set @u_id = left(@uid,@index1 - 1)
else
set @u_id = @uid
insert into #TempIDTable select @u_id
set @uid= right(@uid,len(@uid) - @index1)
if len(@uid) = 0
break
end

Select * from #TempIDTable
--drop table #TempIDTable

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Friday, June 17, 2011

Date Conversion from YYYY-MM-DD HH:MM:SS:MMM to YYYY-MM-DD 00:00:00:000 !

Just keeping it handy !

declare @StartTime as DateTime
set @StartTime= dateadd(dd,0, datediff(dd,0,'2011-06-08 11:18:26.000'))
select @StartTime as StartTime


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Tuesday, March 23, 2010

Schema Spy, A Graphical Database Schema Metadata Browser.

Schemaspy is a java based tool that analyzes the metadata of a schema in a database and generated the visual representation of it. The output is highly user friendly. You can browse through table via child and parent table relationship.

Schema Spy uses the dot executable from graphviz to generate the graphical representation of the schema and its relationship. Graphviz is the graphics visualization software that takes descriptions of graphs in a simple text language, and make diagrams in several useful formats such as images and SVG for web pages, Postscript for inclusion in PDF or other documents; or display in an interactive graph browser.

Following is the steps to execute the SchemaSpy tool (for a sample MYSQL database.)
1. Download and install Graphviz from http://www.graphviz.org/Download..php
2. Download the Schema spay jar file, Schemaspy_x_y_z.jar from http://sourceforge.net/projects/schemaspy/files/
3. Download the corresponding JDBC Connector and have it on the same source folder where the schemaspy_x_y_z.jar resides. For example for a mysql database, I would simply download mysql-connector-java-5.1.5.jar or any other latest version of mysql connector.
4. Now from the source location of your Schemaspy_x_y_z.jar file, execute schemaspy to generate the graphical representation of the schema of your database, as shown on the following syntax

java -jar schemaSpy_x.y.z.jar -t database_type -dp mysql jdbcdatabase_connector -hq -o output_Directory -db databaseName -u username -p password
for example : java -jar schemaSpy_4.1.1.jar -t mysql -dp mysql-connector-java-5.1.5.jar -hq -o out -db bisudatabae -u bishow -p north


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Friday, January 22, 2010

Converting Clob Datatype to String and ViceVersa .

If you have been using Hibernate 3.x.x or greater you can easily convert clob type to string type and vice versa, i.e String data type to Clob type.

Following piece of codes demonstrate the process of doing the conversion.


.........
.........

Clob textClobValue;
String textValue;
String newTextValue;
Clob newTextClobValue;
InputStream textStream;
Paragraph paragraph // my domain Class that contains a clob datatypes and used to update the database connection with hibernate connection (Hibernate version >=3.0)
...........
...........

textClobValue=paragraph.getText();
textStream = textClobValue.getAsciiStream(); //return inputstream
textValue=convertStreamToString(textStream);
newTextValue=textValue.replaceAll("Some text","new Text"); //Replacing some text from old text.

newTextClobValue=Hibernate.createClob(newTextValue);
//System.out.println("Updated="+newParaContentValue);
paragraph.setText(newTextClobValue);
..........
..........
..........



public static String convertStreamToString(InputStream is) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;

while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
return sb.toString();
}




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Tuesday, November 3, 2009

Converting Groovy Array type to Java Array Type

Following is the code snipped in groovy that demonstrate the conversion Groovy Array type to Java Array Type.
Code for Groovy

def param=[]
param+="paramater 1"
param+="paramater 2"
param+="paramater 3"
param+="paramater 4"
def stringArgForJava = (String[])params


Test.callJavaClass(stringArgForJava) //static method


The sample java class is as follow;

class Test
{
public static void callJavaClass(String[] arg)
{
for(int i=0;i {
System.out.println("params "+i ":" +params[i]);
}

}
}








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Tuesday, October 13, 2009

Read a variable defined on the config file from a controller in a grail application



Let's say, you have the config.groovy file as follow.


...........
..........

environments {
production {
myVariable1="I am variable1 on RPOD"
myVariable1="I am variable1 on RPOD"
}



development {
myVariable1="I am variable1 on DEV"
myVariable1="I am variable1 on RPOD"
}

log4j {
appender.stdout = "org.apache.log4j.ConsoleAppender"
.........
........

Now the above varaible can be easily access through any of the controller as follow.


def config = ConfigurationHolder.config
def myVaraible1 = config.myVaraible1
def myVaraible2 = config.myVaraible2



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Wednesday, July 8, 2009

Reading the status code of HTTP Request !

When you make an HTTP request to any server url throuh your client software, lets say IE, HTTP Status codes are returned by the server to the client software to determine the outcome of your request. There are five different classes of status code range. They are
Status codes 100-101
Status codes 200-206
Status codes 300-307
Status codes 400-417
Status codes 500-505

Following is a simple program written in groovy that checks and returns the status code of any url.

import java.net.URL;
def url
def message =""
boolean fail=true
def urlString="http://192.168.0.1/test/test.html"
println checkURL(urlString)

def checkURL(urlString){
int status_code
def tempmessage=""
URL URLserver = new URL("urlString");
try{
URLConnection connection = (HttpURLConnection)URLserver.openConnection();

status_code = connection.getResponseCode();


switch (status_code)
{
case 200:
tempmessage=" Connection Successful"
break;
case 401:
tempmessage="UnAuthorised"
break;
case 405 :
tempmessage= " Resource Not Found"
break;
case 408:
tempmessage="Request Time-out"
break;
case 500:
tempmessage="Internal Server Error"
break;
case 502:
tempmessage="Bad Gateway"
break;
case 503:
tempmessage="Service Temporarily Unavailable"
break;
default :
tempmessage= connection.getResponseMessage()
break;

}
}
catch (Exception exc){
tempmessage=exc

}

return "\n "+urlString+" :"+status_code+":"+tempmessage;

}




Visit http://www.w3.org/Protocols/HTTP/HTRESP.html for detail about the status codes.



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