Tutorial by Examples: r

The following technique allows you to add your content to an HTML element and center it both horizontally and vertically without worrying about its height or width. The outer container should have display: table; The inner container should have display: table-cell; should have vertical-al...

Read-only properties were always possible in VB.NET in this format: Public Class Foo Private _MyProperty As String = "Bar" Public ReadOnly Property MyProperty As String Get Return _MyProperty End Get End Property End Class The new version of Visual Basi...

Similar to partial classes the new version of Visual Basic is now able to handle partial modules and partial interfaces. The syntax and behaviour is exactly the same as it would be for partial classes. A partial module example: Partial Module Module1 Sub Main() Console.Write("Ping -&g...

The clearfix hack is a popular way to contain floats (N. Gallagher aka @necolas) Not to be confused with the clear property, clearfix is a concept (that is also related to floats, thus the possible confusion). To contain floats, you've to add .cf or .clearfix class on the container (the parent)...

you can use -c <name>=<value> to add a configuration only for one command. To commit as an other user without having to change your settings in .gitconfig : git -c user.email = mail@example commit -m "some message" Note: for that example you don't need to precise both user...

Go to Help → About Eclipse → Check if the m2e feature is there: .

In order to use compression over the wire for a faster transfer, pass the --compress option to mysqldump. Example: mysqldump -h db.example.com -u username -p --compress dbname > dbname.sql Important: If you don't want to lock up the source db, you should also include --lock-tables=false. But ...

gunzip -c dbname.sql.gz | mysql dbname -u username -p Note: -c means write output to stdout.

Available in Git 1.8.2 and above. 1.8 Pre-push hooks can be used to prevent a push from going though. Reasons this is helpful include: blocking accidental manual pushes to specific branches, or blocking pushes if an established check fails (unit tests, syntax). A pre-push hook is created by simpl...

Sometimes it happens that a file was being tracked by git, but in a later point in time was added to .gitignore, in order to stop tracking it. It's a very common scenario to forget to clean up such files before its addition to .gitignore. In this case, the old file will still be hanging around in th...

Some problems can occur if the .git folder has wrong permission. Fixing this problem by setting the owner of the complete .git folder. Sometimes it happen that another user pull and change the rights of the .git folder or files. To fix the problem: chown -R youruser:yourgroup .git/

To create a patch, there are two steps. Make your changes and commit them. Run git format-patch <commit-reference> to convert all commits since the commit <commit-reference> (not including it) into patch files. For example, if patches should be generated from the latest two commit...

To list local branches that contain a specific commit or tag git branch --contains <commit> To list local and remote branches that contain a specific commit or tag git branch -a --contains <commit>

impl<K, V> Serialize for MyMap<K, V> where K: Serialize, V: Serialize { fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: Serializer { let mut state = serializer.serialize_map(Some(self.len()))?; ...

// A Visitor is a type that holds methods that a Deserializer can drive // depending on what is contained in the input data. // // In the case of a map we need generic type parameters K and V to be // able to set the output type correctly, but don't require any state. // This is an example of a...

In build.sbt, make sure you include (here for Mysql and PostGreSQL): "mysql" % "mysql-connector-java" % "5.1.20", "org.postgresql" % "postgresql" % "9.3-1100-jdbc4", "com.typesafe.slick" %% "slick" % "3.1.1&...

import { Component } from '@angular/core'; import { Router , ROUTER_DIRECTIVES} from '@angular/router'; import { NgForm } from '@angular/forms'; @Component({ selector: 'login', template: ` <h2>Login</h2> <form #f="ngForm" (ngSubmit)="login(f.value,f....

First, you have to request authorization of location services let locationManager = CLLocationManager() locationManager.delegate = self locationManager.requestWhenInUseAuthorization() // OR locationManager.requestAlwaysAuthorization() Then you can get all iBeacons' information inside didRange...

Git shortlog is used to summarize the git log outputs and group the commits by author. By default, all commit messages are shown but argument --summary or -s skips the messages and gives a list of authors with their total number of commits. --numbered or -n changes the ordering from alphabetical (...

git log --pretty=format:"%ai" | awk '{print " : "$1}' | sort -r | uniq -c