Tutorial by Examples: ed

Installing unsigned add-ons

In order to install an extension as a normal add-on into Release or Beta versions of Firefox greater than, or equal to, version 48, the extension must be signed by Mozilla. An extension is signed by submitting it to AMO. Once it is signed, the extension can be installed on any version of Firefox whi...

Single type deconstructed argument

type ProjectIdType = ProjectId String getProject : ProjectIdType -> Cmd Msg getProject (ProjectId id) = Http.get <| "/projects/" ++ id

The below code deals with leaks of memory, like it detects when in SQLLite finalize is called or not.

StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder() .detectActivityLeaks() .detectLeakedClosableObjects() .penaltyLog() .build());

Only one delimiter character

You cannot have more than one delimiter: if you specify something like -d ",;:", some implementations will use only the first character as a delimiter (in this case, the comma.) Other implementations (e.g. GNU cut) will give you an error message. $ cut -d ",;:" -f2 <<<&...

Repeated delimiters are interpreted as empty fields

$ cut -d, -f1,3 <<<"a,,b,c,d,e" a,b is rather obvious, but with space-delimited strings it might be less obvious to some $ cut -d ' ' -f1,3 <<<"a b c d e" a b cut cannot be used to parse arguments as the shell and other programs do.

Object-based programming using structs

Structs may be used to implement code in an object oriented manner. A struct is similar to a class, but is missing the functions which normally also form part of a class, we can add these as function pointer member variables. To stay with our coordinates example: /* coordinates.h */ typedef stru...

Loading namespaced jQuery plugins

Typically when loading plugins, make sure to always include the plugin after jQuery. <script src="https://code.jquery.com/jquery-3.1.1.min.js"></script> <script src="some-plugin.min.js"></script> If you must use more than one version of jQuery, then m...

Specifying the Direction of the Query From the Top Down

SELECT E.LAST_NAME|| ' reports to ' || PRIOR E.LAST_NAME "Walk Top Down" FROM HR.EMPLOYEES E START WITH E.MANAGER_ID IS NULL CONNECT BY PRIOR E.EMPLOYEE_ID = E.MANAGER_ID;

This have to be in a Class module, examples later referred as "Random"

' How To Seek Past VBA's 2GB File Limit ' Source: https://support.microsoft.com/en-us/kb/189981 (Archived) ' This must be in a Class Module Option Explicit Public Enum W32F_Errors W32F_UNKNOWN_ERROR = 45600 W32F_FILE_ALREADY_OPEN W32F_PROBLEM_OPENING_FILE W32F_FILE_ALREAD...

Hello World with Nested Dependencies

The following example expands upon Hello World by demonstrating multiple dependencies using the define() function. Create a new HTML file called index.html and paste the following content: <!DOCTYPE html> <html lang="en"> <head> <title>Hello RequireJS</t...

Obfuscated Email Formatter

In our example we will be creating a customized formatter for email addresses that will allow us to display obfuscated email addresses to fool those nasty spammers. The formatter will have a some configuration options that will allow us to control how the email address is obfuscated: Remove @ an...

Plotting multiple data files

First method - Concatenation of strings The simplest method to plot multiple data files is to insert a for loop inside the plot command of gnuplot. Assuming you have N files named sequently, i.e. file_1.dat file_2.dat file_3.dat ... file_N.dat Executing the command plot for[i = 1:N] &quot...

Recording Performance Scripts for Mobile Devices

JMeter can also can be used for recording mobile performance testing. Mobile scripts recording is very similar to web application scripts recording. Configure JMeter Configure “JMeter Templates” as specified in chapter 1. Configure your mobile phone After the JMeter configuration is prepared...

Basic variable declarations

/* These variables are declared with `NO-UNDO`. That state...

Embedded structs

because a struct is also a data type, it can be used as an anonymous field, the outer struct can directly access the fields of the embedded struct even if the struct came from a diffrent package. this behaviour provides a way to derive some or all of your implementation from another type or a set of...

Creating a more advanced service

In the following example we will create a service with the name visualizer. We will specify a custom label and remap the internal port of the service from 8080 to 9090. In addition we will bind mount an external directory of the host into the service. docker service create \ --name=visual...

Find the single most recent item in a list of timestamped events

In tables recording events there is often a datetime field recording the time an event happened. Finding the single most recent event can be difficult because it's always possible that two events were recorded with exactly identical timestamps. You can use row_number() over (order by ...) to make su...

Acquire HERE SDK Credentials

Typically, before developing a new HERE SDK application, you need to acquire a set of credentials by registering your application on http://developer.here.com. Each application requires a unique set of credentials. When you register your app, the registered bundle identifier must match the package n...

Accessing Chrome Dev Tools

While chrome browser is open to any tab (except welcome tabs) you have three options to open Chrome Dev Tools: Keyboard: Type command ⌘+option+i Browser Menu: Click 'Menu' > 'More Tools' > 'Developer Tools' Program Menu (at top of your screen): Click 'View' > 'Developer' > 'Develope...

Example data and code

Example Data Please try to provide a minimal example input data in a format that can be directly used by the answers without tedious and time consuming parsing for example input file or local collection with all code required to create distributed data structures. When applicable always include ty...

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