Tutorial by Examples: t

Postscript is a dynamic-namespacing or LISP 1 language. But it provides the tools to implement local variables in procedures and other effects needed to implement algorithms. For local names in a procedure, make a new dictionary at the start and pop it at the end. /myproc { 10 dict begin ...

Detailed instructions on getting rails-activerecord set up or installed.

After finding an official Julia package, it is straightforward to download and install the package. Firstly, it's recommended to refresh the local copy of METADATA: julia> Pkg.update() This will ensure that you get the latest versions of all packages. Suppose that the package we want to inst...

Sometimes, the latest tagged version of a package is buggy or is missing some required features. Advanced users may wish to update to the latest development version of a package (sometimes referred to as the "master", named after the usual name for a development branch in Git). The benefit...

Some experimental packages are not included in the METADATA package repository. These packages can be installed by directly cloning their Git repositories. Note that there may be dependencies of unregistered packages that are themselves unregistered; those dependencies cannot be resolved by the pack...

Using an AppCompat theme, the ProgressBar's color will be the colorAccent you have defined. 5.0 To change the ProgressBar color without changing the accent color you can use theandroid:theme attribute overriding the accent color: <ProgressBar android:theme="@style/MyProgress" ...

According to Material Documentation: A linear progress indicator should always fill from 0% to 100% and never decrease in value. It should be represented by bars on the edge of a header or sheet that appear and disappear. To use a material Linear ProgressBar just use in your xml: <Progres...

This example covers common errors with using the 'java' command. "Command not found" If you get an error message like: java: command not found when trying to run the java command, this means that there is no java command on your shell's command search path. The cause could be: yo...

Animation curves allows you to change a float parameter as the animation plays. For example, if there is an animation of length 60 seconds and you want a float value/parameter, call it X, to vary through the animation (like at animation time = 0.0s; X = 0.0 , at animation time = 30.0s; X = 1.0, at...

Buttons are one of the simplest controls and mostly used for executing some code when the user wants. Here we have a really simple case, show a Message box when a button is clicked. We add a button to a form, name it cmdShowMessage as used in code to identify the object and set the buttons text to ...

TextBoxes allow the user to input data into the program. We are going to modify the form and add a textbox so the messagebox show us the message that the user wants. Now our form looks like: And then modify the button click event to use the text of the textbox: private void cmdShowMessage_Click...

WampServer is a Windows web development environment. It allows you to create web applications with Apache2, PHP and a MySQL database. Alongside, PhpMyAdmin allows you to manage easily your databases. WampServer is available for free (under GPML license) in two distinct versions : 32 and 64 bits. Wa...

String macros are syntactic sugar for certain macro invocations. The parser expands syntax like mymacro"my string" into @mymacro_str "my string" which then, like any other macro call, gets substituted with whatever expression the @mymacro_str macro returns. Base Julia com...

Julia Symbol literals must be legal identifiers. This works: julia> :cat :cat But this does not: julia> :2cat ERROR: MethodError: no method matching *(::Int64, ::Base.#cat) Closest candidates are: *(::Any, ::Any, ::Any, ::Any...) at operators.jl:288 *{T<:Union{Int128,Int16,Int...

Swift button.setImage(UIImage(named:"test-image"), forState: .normal) Objective C [self.button setImage:[UIImage imageNamed:@"test-image"] forState:UIControlStateNormal]; Multiple Control States You can also set an image for multiple UIControlStates, for example to set...

This is a continuation of the "main class" and "executable JAR" examples. Typical Java applications consist of an application-specific code, and various reusable library code that you have implemented or that has been implemented by third parties. The latter are commonly referr...

Search for a lemma when you know what its conclusion ought to be: Coq < SearchPattern (S _ <= _). le_n_S: forall n m : nat, n <= m -> S n <= S m You can also search on a partial conclusion (the conclusion and one or several last hypotheses). Coq < Require Import Arith. Coq &...

The Comprehensive TeX Archive Network (CTAN) is indeed that, the comprehensive repository of LaTeX packages. Most if not all quality packages (and more) are on there, and all the good ones include documentation. Enter the package name into the search bar. Select the package from the list...

If you use the TeX Live distribution you can use the command-line program texdoc. For instance, texdoc biblatex will open the documentation of package biblatex. Or if you are not command-line-savvy, the same can be found online at http://www.texdoc.net/

Depending on the service, you will either need to use Basic Authentication with a username and password or pass an apikey as a parameter in each request. Some services also support token authentication. GET using Tone Analyzer: curl -X GET \ -u "username":"password" \ -d &qu...