Tutorial by Examples: diff

Different Reference Types

java.lang.ref package provides reference-object classes, which support a limited degree of interaction with the garbage collector. Java has four main different reference types. They are: Strong Reference Weak Reference Soft Reference Phantom Reference 1. Strong Reference This is the usual...

Java Language • Reference Types

Difference between jQuery(fn) and executing your code before

Using the document-ready event can have small performance drawbacks, with delayed execution of up to ~300ms. Sometimes the same behavior can be achieved by execution of code just before the closing </body> tag: <body> <span id="greeting"></span> world! <sc...

jQuery • document-ready event

Advanced use of SetTimer: Calling the same function with different parameters

This is an example of something that would have been straight up impossible with labels. If you execute the same label multiple times at the same time and they rely on variables that are being defined within them, they very likely interfere and cause unexpected behavior. Here is how to do it with f...

AutoHotkey • Use functions instead of labels

Using different package and folder name

It is perfectly fine to use a package name other than the folder name. If we do so, we still have to import the package based on the directory structure, but after the import we have to refer to it by the name we used in the package clause. For example, if you have a folder $GOPATH/src/mypck, and i...

Go • Packages

Understanding the different report bands

Title This band is showed once at the beginning of the report. It can be used as first page by setting the attribute isTitleNewPage="true" Page Header This appears at the beginning of each page excluding first page if Title band is used and last page if Summary band is used with setting...

jasper-reports • Getting started with jasper-reports

Differences between inner/outer joins

SQL has various join types to specify whether (non-)matching rows are included in the result: INNER JOIN, LEFT OUTER JOIN, RIGHT OUTER JOIN, and FULL OUTER JOIN (the INNER and OUTER keywords are optional). The figure below underlines the differences between these types of joins: the blue area repres...

SQL • JOIN

DATEDIFF for calculating time period differences

General syntax: DATEDIFF (datepart, datetime_expr1, datetime_expr2) It will return a positive number if datetime_expr is in the past relative to datetime_expr2, and a negative number otherwise. Examples DECLARE @now DATETIME2 = GETDATE(); DECLARE @oneYearAgo DATETIME2 = DATEADD(YEAR, -1, @now...

Microsoft SQL Server • Dates

PDF and PMF for different distributions in R

PMF FOR THE BINOMIAL DISTRIBUTION Suppose that a fair die is rolled 10 times. What is the probability of throwing exactly two sixes? You can answer the question using the dbinom function: > dbinom(2, 10, 1/6) [1] 0.29071 PMF FOR THE POISSON DISTRIBUTION The number of sandwhich ordered in ...

R Language • Probability Distributions with R

Difference with method parameters ref and out

There are two possible ways to pass a value type by reference: ref and out. The difference is that by passing it with ref the value must be initialized but not when passing it with out. Using out ensures that the variable has a value after the method call: public void ByRef(ref int value) { C...

C# Language • Value type vs Reference type

Share information between different pages

One of the easiest examples of using shared services is when we want to store some data from a given page of our application, and then get that data again but from another page. One option could be to send that data as a parameter (for instance, if one page calls the other one) but if we want to us...

ionic2 • Using Services

Differece between attr() and prop()

attr() gets/sets the HTML attribute using the DOM functions getAttribute() and setAttribute(). prop() works by setting the DOM property without changing the attribute. In many cases the two are interchangeable, but occasionally one is needed over the other. To set a checkbox as checked: $('#tosAcc...

jQuery • Attributes

Different types of explicit wait conditions

In explicit wait, you expect for a condition to happen. For example you want to wait until an element is clickable. Here is a demonstration of a few common problems. Please note: In all of these examples you can use any By as a locator, such as classname, xpath, link text, tag name or cssSelector ...

selenium-webdriver • Wait

Using differential:vulcanize

In the root of your project, make sure Bower is installed (npm install -g bower) and run bower init. This will create a bower.json file in your project's directory. Create a new file called .bowerrc to your root directory. It should contain the following: { "directory": "public/b...

meteor • Using Polymer with Meteor

Different ActiveRecord classes in a single transaction

Though the transaction class method is called on some ActiveRecord class, the objects within the transaction block need not all be instances of that class. This is because transactions are per-database connection, not per-model. In this example a balance record is transactionally saved even though ...

Ruby on Rails • ActiveRecord Transactions

Different syntax to post/pre a signal

from django.db import models from django.contrib.auth.models import User from django.db.models.signals import post_save from django.dispatch import receiver class UserProfile(models.Model): user = models.OneToOneField(User, related_name='user') website = models.URLField(default='', ...

Django • Signals

Comparison of different F# data pipelines

In F# there are many options for creating data pipelines, for example: List, Seq and Array. What data pipeline is preferable from memory usage and performance perspective? In order to answer this we'll compare performance and memory usage using different pipelines. Data Pipeline In order to me...

F# • F# Performance Tips and Tricks

Preview Different Screen Size (Devices) and Orientations

2.1.3 1. Preview Different Devices There is a preview panel at the right of the android studio. In thispanel there is a button with device name with which you are previewing the UI of your app like this . Click on small dropdown indicator of this and a floating panel will appear with all the pr...

android-studio • Getting started with android-studio

Using different (local) Nuget package sources using UI

It is common for company to set up it's own nuget server for distribution of packages across different teams. Go to Solution Explorer and click Right Mouse button then choose Manage NuGet Packages for Solution In window that opens click on Settings Click on + in top right corner the...

.NET Framework • NuGet packaging system

difference between two commit or branch

To view difference between two branch git diff <branch1>..<branch2> To view difference between two branch git diff <commitId1>..<commitId2> To view diff with current branch git diff <branch/commitId> To view summary of changes git diff --stat <branch/com...

Git • Git Diff

Refresh vimdiff views if a file is saved in another window

:autocmd BufWritePost * if &diff | diffupdate | endif

vim • Autocommands