Tutorial by Examples: el

Install a Common Lisp implementation on the server. (E.g. sbcl, clisp, etc...) Install quicklisp on the server. Load SWANK with (ql:quickload :swank) Start the server with (swank:create-server). The default port is 4005. [On your local machine] Create a SSH tunnel with ssh -L4005:127.0.0.1:400...

A loop is said to be an infinite loop if the control enters but never leaves the body of the loop. This happens when the test condition of the loop never evaluates to false. Example: C99 for (int i = 0; i >= 0; ) { /* body of the loop where i is not changed*/ } In the above example...

The let expressions in scheme are in fact macros. They can be expressed with lambdas. A simple let might look like this: (let ((x 1) (y 2)) (+ x y)) It will return 3 as the value of the last expression of the let body is returned. As you can see, a let-expression is actually executing somethi...

You can wait until the next frame. yield return null; // wait until sometime in the next frame You can have multiple of these calls in a row, to simply wait for as many frames as desired. //wait for a few frames yield return null; yield return null; Wait for approximately n seconds. It is ...

import argparse import sys def check(): print("status") return 0 parser = argparse.ArgumentParser(prog="sub", add_help=False) subparser = parser.add_subparsers(dest="cmd") subparser.add_parser('status', help='show status') subparser.add_parser('lis...

When using PowerShell, you can use setx.exe to set environment variables permanently. Start PowerShell Type one of the following: setx ASPNETCORE_ENVIRONMENT "development" setx ASPNETCORE_ENVIRONMENT "staging" Restart PowerShell

Extended version of http://www.riptutorial.com/python/example/25282/argparse--default-help-formatter- that fixed help output. import argparse import sys class CustomHelpFormatter(argparse.HelpFormatter): def _format_action(self, action): if type(action) == argparse._SubParsersActi...

Many, pure python, packages are not yet available on the Python Package Index as wheels but still install fine. However, some packages on Windows give the dreaded vcvarsall.bat not found error. The problem is that the package that you are trying to install contains a C or C++ extension and is not c...

Given a file like this: $ cat file hello/how/are/you i am fine You can use /pattern/ to match specific lines: $ sed -n '/hello/p' file hello/how/are/you If the pattern contains slashes itself, you can use another delimiter using \cBREc: $ sed -n '\#hello/how#p' file hello/how/are/you $...

When using an inline data declaration inside of a SELECT...ENDSELECT block or SELECT SINGLE statement, the @ character must be used as an escape character for the DATA(lv_cityto) expression. Once the escape character has been used, all further host variables must also be escaped (as is the case with...

To run macros and maintain the security Office applications provide against malicious code, it is necessary to digitally sign the VBAProject.OTM from the VBA editor > Tools > Digital Signature. Office comes with a utility to create a self-signed digital certificate that you can employ on th...

The Data.Functor module contains two combinators, <$ and $>, which ignore all of the values contained in a functor, replacing them all with a single constant value. infixl 4 <$, $> <$ :: Functor f => a -> f b -> f a (<$) = fmap . const $> :: Functor f => f a ...

Steps to create "Hello, World!" application in Oracle Application Express: Log in to your workspace. Click Application Builder. Application Builder page opens. Click Create. Page with 4 application types appears. Page contains short help text about each application type. Click Deskto...

If you have a virtualenv and CherryPy is already installed in it, create a file hello.py: #!/usr/bin/env python # -*- coding: UTF-8 -*- import cherrypy class HelloWorld(object): @cherrypy.expose def index(self): return 'Hello World!' @cherrypy.expose def greet(...

Create the source file for your new Client Script Create a new JavaScript file using your favorite editor or IDE Add the following source code to your file (original source here) /** * A simple "Hello, World!" example of a Client Script. Uses the `pageInit` * event to wr...

Create the source file for your new Client Script Create a new JavaScript file using your favorite editor or IDE Add the following source code to your file (original source here) define([], function () { /** * A simple "Hello, World!" example of a Client Script. U...

Build the APK First of all we need to build the APK. ionic build --release android Generate private Key Then we will create a keystore to sign the APK. keytool -genkey -v -keystore my-release-key.keystore -alias alias_name -keyalg RSA -keysize 2048 -validity 10000 Change my-release-key with ...

As stated previously, there is no searching capability built in to the Records Browser. Once you've navigated to the appropriate Record Type, if you don't already know a particular field's Internal ID, the easiest way to find it is to use your browser's Find function (usually CTRL+F) to locate the f...

The Required column of the schema indicates whether this field is required to save the record. If this column says true, then you will need to provide a value for this field when saving any record of this type.

The nlapiSubmitField column is a critical piece to understand. This column indicates whether the field is available for inline editing. If nlapiSubmitField is true, then the field can be edited inline. This greatly impacts how this field is handled when trying to use the nlapiSubmitField or record.s...