arrayaccess | 易学教程

PHP 5.4's simplified string offset reading

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As many of you already know, PHP 5.4 alpha has been released. I have a question regarding the following. Simplified string offset reading. $str[1][0] is now a legal construct. How exactly does $str[1][0] work? EDIT: http://php.net/releases/NEWS_5_4_0_alpha1.txt Philip Olson This is a side effect, and was mentioned in the proposal here: http://php.markmail.org/thread/yiujwve6zdw37tpv The feature is speed/optimization of string offsets. Hi, Recently I noticed that reading of string offset is performed in two steps. At first special string_offset variant of temporary_variable is created in zend

Mocking/Stubbing an Object of a class that implements arrayaccess in PHPUnit

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问题 Here is the constructor of the class I am writing a test suite for (it extends mysqli): function __construct(Config $c) { // store config file $this->config = $c; // do mysqli constructor parent::__construct( $this->config['db_host'], $this->config['db_user'], $this->config['db_pass'], $this->config['db_dbname'] ); } The Config class passed to the constructor implements the arrayaccess interface built in to php: class Config implements arrayaccess{...} How do I mock/stub the Config object?

Mocking/Stubbing an Object of a class that implements arrayaccess in PHPUnit

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Here is the constructor of the class I am writing a test suite for (it extends mysqli): function __construct(Config $c) { // store config file $this->config = $c; // do mysqli constructor parent::__construct( $this->config['db_host'], $this->config['db_user'], $this->config['db_pass'], $this->config['db_dbname'] ); } The Config class passed to the constructor implements the arrayaccess interface built in to php: class Config implements arrayaccess{...} How do I mock/stub the Config object? Which should I use and why? Thanks in advance! If you can easily create a Config instance from an array,

In C++11 and beyond does std::string::operator[] do bounds checking?

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问题 I have seen many times that std::string::operator[] does not do any bounds checking. Even What is the difference between string::at and string::operator[]?, asked in 2013, the answers say that operator[] does not do any bounds checking. My issue with this is if I look at the standard (in this case draft N3797) in [string.access] we have const_reference operator[](size_type pos) const; reference operator[](size_type pos); Requires: pos <= size() . Returns: *(begin() + pos) if pos < size() .