Tutorial by Topics: o

Most command line tools rely on arguments passed to the program upon its execution. Instead of prompting for input, these programs expect data or specific flags (which become booleans) to be set. This allows both the user and other programs to run the Python file passing it data as it starts. This s...

A set contains only one copy of each distinct element. Unlike some other programming languages, base R does not have a dedicated data type for sets. Instead, R treats a vector like a set by taking only its distinct elements. This applies to the set operators, setdiff, intersect, union, setequal an...

SELECT * FROM table WHERE (condition1) AND (condition2); SELECT * FROM table WHERE (condition1) OR (condition2);

'() → () '(1 2 3 4 5) → (1 2 3 4 5) '(1 foo 2 bar 3) → (1 'foo 2 'bar 3) (list 1 2 3 4 5) → (1 2 3 4 5) (list* [1 2 3 4 5]) → (1 2 3 4 5) [] → [] [1 2 3 4 5] → [1 2 3 4 5] (vector 1 2 3 4 5) → [1 2 3 4 5] (vec '(1 2 3 4 5)) → [1 2 3 4 5] {} => {} {:keyA 1 :keyB 2} → {:keyA 1 :keyB 2} ...

TargetType target = (SourceType) source;

subprocess.call(args, *, stdin=None, stdout=None, stderr=None, shell=False, timeout=None) subprocess.Popen(args, bufsize=-1, executable=None, stdin=None, stdout=None, stderr=None, preexec_fn=None, close_fds=True, shell=False, cwd=None, env=None, universal_newlines=False, startupinfo=None, creati...

MySQL has some special names called reserved words. A reserved word can be used as an identifier for a table, column, etc. only if it's wrapped in backticks (`), otherwise it will give rise to an error. To avoid such errors, either don't use reserved words as identifiers or wrap the offending ident...

NameDescriptionASCII()Return numeric value of left-most characterBIN()Return a string containing binary representation of a numberBIT_LENGTH()Return length of argument in bitsCHAR()Return the character for each integer passedCHAR_LENGTH()Return number of characters in argumentCHARACTER_LENGTH()Syno...

git clone [<options>] [--] <repo> [<dir>] git clone [--template=<template_directory>] [-l] [-s] [--no-hardlinks] [-q] [-n] [--bare] [--mirror] [-o <name>] [-b <name>] [-u <upload-pack>] [--reference <repository>] [--dissociate] [--separate-git-dir &...

In this topic you will learn how to integrate with Node.js using MYSQL database management tool. You will learn various ways to connect and interact with data residing in mysql using a nodejs program and script.

ParameterDetaillimitThe parameter of the C# method. You supply the argument via the Page Method.onSuccessThe JavaScript function that is executed when the Page Method call is successful.onErrorThe JavaScript function that is executed when there is an error in the Page Method call. More than one...

What we do with HttpServiceLayer class is extend the Http class from angular and add our own logic to it. We then inject that class in the bootstrap class of the application and tell angular that were we import the Http class, in the back to insert the HttpServiceLayer. Anywhere in the code we ...

$("#sortable").sortable({ /*Options Here*/ }); //Initialise Sortable $("#sortable").sortable("option", "option_name", option_value); //Set option outside initialiser var value = $("#sortable").sortable("option", "option_...

This section provides an overview of what google-chrome-devtools is, and why a developer might want to use it. It should also mention any large subjects within google-chrome-devtools, and link out to the related topics. Since the Documentation for google-chrome-devtools is new, you may need to c...

Magic constants are distinguished by their __CONSTANTNAME__ form. There are currently eight magical constants that change depending on where they are used. For example, the value of __LINE__depends on the line that it's used on in your script. These special constants are case-insensitive and are...

When using method swizzling in Swift there are two requirements that your classes/methods must comply with: Your class must extend NSObject The functions you want to swizzle must have the dynamic attribute For a complete explanation of why this is required, check out Using Swift with Cocoa...

The singleton pattern has the goal to allow only one instance of a class to exists at any given time. Preventing the direct instantiation via constructor is usually prevent by making it private. However, this is not possible in As3 and thus other ways to control the number of instances have to be...