Tutorial by Topics: di

require spl_autoload_require Autoloading, as part of a framework strategy, eases the amount of boilerplate code you have to write.

mydict = {} mydict[k] = value value = mydict[k] value = mydict.get(k) value = mydict.get(k, "default_value") ParameterDetailskeyThe desired key to lookupvalueThe value to set or return Helpful items to remember when creating a dictionary: Every key must be unique (otherwi...

command </path/to/file # Redirect standard input to file command >/path/to/file # Redirect standard output to flie command file_descriptor>/path/to/file # Redirect output of file_descriptor to file command >&file_descriptor # Redirect output to file_descriptor command file_des...

ParameterDetailscard_dataJSON object containing payment information for transactioncredit_card_detailsJSON object containing credit card data that is sent to PayPal to be vaultedclient_idYour PayPal application client ID (OAuth 2 credentials)paypalPayPal Node SDK referencesecretYour PayPal applicat...

CSS specificity intends to promote code conciseness by allowing an author to define some general formatting rules for a broad set of elements, and then to override them for a certain subset.

ParameterDetailsstring $toThe recipient email addressstring $subjectThe subject linestring $messageThe body of the emailstring $additional_headersOptional: headers to add to the emailstring $additional_parametersOptional: arguments to pass to the configured mail send application in the command line...

Conditional expressions, involving keywords such as if, else if, and else, provide Swift programs with the ability to perform different actions depending on a Boolean condition: True or False. This section covers the use of Swift conditionals, Boolean logic, and ternary statements. For more in...

read.csv(file, header = TRUE, sep = ",", quote = """, dec = ".", fill = TRUE, comment.char = "", ...) read.csv2(file, header = TRUE, sep = ";", quote = """, dec = ",", fill = TRUE, comment.char = "", ....

#include <stdio.h> /* Include this to use any of the following sections */ FILE *fopen(const char *path, const char *mode); /* Open a stream on the file at path with the specified mode */ FILE *freopen(const char *path, const char *mode, FILE *stream); /* Re-open an existing stream on the...

See also separate topic on Overload Resolution Ambiguities can occur when one type can be implicitly converted into more than one type and there is no matching function for that specific type. For example: void foo(double, double); void foo(long, long); //Call foo with 2 ints foo(1, 2);...

$( ".selector" ).dialog( "option", "disabled" ); // Option Getter, specific $( ".selector" ).dialog( "option" ); // Option Getter all $( ".selector" ).dialog( "option", "disabled", true ); // Option Setter, specific...

Threads allow Python programs to handle multiple functions at once as opposed to running a sequence of commands individually. This topic explains the principles behind threading and demonstrates its usage.

In C++, it is possible to define operators such as + and -> for user-defined types. For example, the <string> header defines a + operator to concatenate strings. This is done by defining an operator function using the operator keyword. The operators for built-in types cannot be change...

Classes and IDs make referencing HTML elements from scripts and stylesheets easier. The class attribute can be used on one or more tags and is used by CSS for styling. IDs however are intended to refer to a single element, meaning the same ID should never be used twice. IDs are generally used with J...

ParameterDetailsbuttonSimple payment buttonconfigPayPal configuration object housing our client ID (from application creation) and the environment we want to use (sandbox or live)paymentPayPal payment detailspaymentConfigConfiguration Intent for the payment information and settingsserviceConfigConf...

$(function() { $( "#selecter" ).accordion(); }); $(function() { $( "#selecter" ).accordion({ active: 2 }); }); $(function() { $( "#selecter" ).accordion({ animate: 200 }); }); $(function() { $( "#selecter" ).accordion({ collapsible: true }); ...

thread() thread(thread&& other) explicit thread(Function&& func, Args&&... args) ParameterDetailsotherTakes ownership of other, other doesn't own the thread anymorefuncFunction to call in a seperate threadargsArguments for func Some notes: Two std::thread obje...