Author Archives: qainterviews

About qainterviews

Software Geek,QA Expert,Blogger

Install Packages in R

You can install packages in R using : install.packages(“rpart.plot”) Advertisements

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Store Encrypted and Decrypted Password Java

https://stackoverflow.com/questions/1132567/encrypt-password-in-configuration-files

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Define Implementation at Runtime using Lambda Expression

import org.testng.annotations.Test; interface MathOperation { int operation(int a,int b); }   public class Lambda2 { @Test public void testLambda2() { MathOperation add=(int a,int b)->a+b; MathOperation mul=(int a,int b)->a*b; System.out.println(“Value after addition seen is “+add.operation(10, 20)); System.out.println(“Value after multiplication seen is … Continue reading

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Using Lambda Expression Java

import org.testng.annotations.Test; interface MultiplyByTwo { int Multiply(int num); } interface MathOperation { int operation(int a,int b); } interface Number { double getValue(); } interface Message { String getMessage(String msg); } public class Lambda2 { @Test public void testLambda2() { MathOperation … Continue reading

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Using Index DataFrame Python

#Using Dataframes import numpy as np import pandas as pd data=[1,2,3,4,5] data=pd.DataFrame(data,index=[‘range’,’range1′,’range2′,’range3′,’range4′]) print(data)

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Using Series Pandas

import numpy as np import pandas as pda data=np.array([1,2,3,4]) p=pda.Series(data) print(p)

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Transpose of Matrix in Python

import numpy as np num1 = np.array([[1,2], [3,4]]) print(num1) print(“Transpose of matrix seen now is”,num1.T)

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