Tutorial by Examples: i

(function(){ var hashMap = {}; function isAnagram (str1, str2) { if(str1.length !== str2.length){ return false; } // Create hash map of str1 character and increase value one (+1). createStr1HashMap(str1); /...

You get this exception mostly with form submissions. Laravel protects application from CSRF and validates every request and ensures the request originated from within the application. This validation is done using a token. If this token mismatches this exception is generated. Quick Fix Add this wi...

ForeignKey field is used to create a many-to-one relationship between models. Not like the most of other fields requires positional arguments. The following example demonstrates the car and owner relation: from django.db import models class Person(models.Model): GENDER_FEMALE = 'F' G...

Getting started with xUnit.net, on Platform: .NET Core / ASP.NET Core Desktop CLR Universal Windows Apps

Fugitive Vim is a plugin by Tim Pope that provides access to git commands that you can execute without leaving vim. Some common commands include: :Gedit - edit a file in the index and write it to stage the the changes :Gstatus - equivalent of git status :Gblame - brings up vertical split of outp...

set var to 2 if var = 2 then say "Var equals 2" end if

set var1 to 5 //set the number to anything if var1 = 5 then say "Var one equals 5" else say "Var one does not equal 5" end if

display dialog "Password" default answer "" set w to text returned of the result if w = "Password" then display notification "Correct" end if

CREATE INDEX ord_customer_ix ON orders (customer_id); By default, if we do not mention anything, oracle creates an index as a b-tree index. But we should know when to use it. B-tree index stores data as binary tree format. As we know that, index is a schema object which stores some sort of entry...

CREATE BITMAP INDEX emp_bitmap_idx ON index_demo (gender); Bitmap index is used when data cardinality is low. Here, Gender has value with low cardinality. Values are may be Male, Female & others. So, if we create a binary tree for this 3 values while searching it will have unnecessary ...

CREATE INDEX first_name_idx ON user_data (UPPER(first_name)); SELECT * FROM user_data WHERE UPPER(first_name) = 'JOHN2'; Function based index means, creating index based on a function. If in search (where clause), frequently any function is used, it's better to create index based on ...

Working with Kettle There are two versions of Kettle aka Pentaho Data Integration : Kettle CE (Community Edition) Kettle EE (Enterprise Edition) Documents aims mainly on Kettle CE edition. Prerequisites PDI requires the Oracle Java Runtime Environment (JRE) version 7. You can obtain a JRE ...

var MongoClient = require('mongodb').MongoClient; //connection with mongoDB MongoClient.connect("mongodb://localhost:27017/MyDb", function (err, db) { //check the connection if(err){ console.log("connection failed."); }else{ ...

The NamedParameterJdbcTemplate class adds support for programming JDBC statements using named parameters, as opposed to programming JDBC statements using only classic placeholder ( '?') arguments. The NamedParameterJdbcTemplate class wraps a JdbcTemplate, and delegates to the wrapped JdbcTempl...

Any @Component or @Configuration could be marked with @Profile annotation @Configuration @Profile("production") public class ProductionConfiguration { // ... } The same in XML config <beans profile="dev"> <bean id="dataSource" class="&l...

Protractor Installation and Setup Step 1: Download and install NodeJS from here. Make sure you have latest version of node. Here, I am using node v7.8.0. You will need to have the Java Development Kit(JDK) installed to run selenium. Step 2: Open your terminal and type in the following command to i...

Let us create a simple Hello World console application and log something to the console using log4net. Once we have this running, we can scale it out to use it in real development scenarios in the following examples. Let's start small and build it up from there. First, we need to create a simple Co...

Suppose you need to work on three different projects project A, project B and project C. project A and project B need python 3 and some required libraries. But for project C you need python 2.7 and dependent libraries. So best practice for this is to separate those project environments. To create v...

Angular 4 is now available! Actually Angular uses semver since Angular 2, which requires the major number being increased when breaking changes were introduced. The Angular team postponed features that cause breaking changes, which will be released with Angular 4. Angular 3 was skipped to be able to...

Suppose you need to work on three different projects project A, project B and project C. project A and project B need python 3 and some required libraries. But for project C you need python 2.7 and dependent libraries. So best practice for this is to separate those project environments. For creati...