Tutorial by Examples: r

Enabling gzip compression can reduce the size of the transferred response by up to 90%, which can significantly reduce the amount of time to download the resource, reduce data usage for the client, and improve the time to first render of your pages. — PageSpeed Insights Compression can be ena...

Fetching resources over the network is both slow and expensive: the download may require multiple roundtrips between the client and server, which delays processing and may block rendering of page content, and also incurs data costs for the visitor. All server responses should specify a caching p...

Arithmetic operators in C++ have the same precedence as they do in mathematics: Multiplication and division have left associativity(meaning that they will be evaluated from left to right) and they have higher precedence than addition and subtraction, which also have left associativity. We can also...

These operators have the usual precedence in C++: AND before OR. // You can drive with a foreign license for up to 60 days bool can_drive = has_domestic_license || has_foreign_license && num_days <= 60; This code is equivalent to the following: // You can drive with a foreign licens...

template< class Iterator > bool next_permutation( Iterator first, Iterator last ); template< class Iterator, class Compare > bool next_permutation( Iterator first, Iterator last, Compare cmpFun ); Effects: Sift the data sequence of the range [first, last) into the next lexicograph...

A condition variable is a primitive used in conjunction with a mutex to orchestrate communication between threads. While it is neither the exclusive or most efficient way to accomplish this, it can be among the simplest to those familiar with the pattern. One waits on a std::condition_variable with...

Passing a pointer argument to a T* parameter, if possible, is better than passing it to a const T* parameter. struct Base {}; struct Derived : Base {}; void f(Base* pb); void f(const Base* pb); void f(const Derived* pd); void f(bool b); Base b; f(&b); // f(Base*) is better than f(const...

java -jar [Path to client JAR] -s [Server address] install-plugin [Plugin ID] The client JAR must be the CLI JAR file, not the same JAR/WAR that runs Jenkins itself. Unique IDs can be found on a plugins respective page on the Jenkins CLI wiki (https://wiki.jenkins-ci.org/display/JENKINS/Plugins) ...

An object pointer (including void*) or function pointer can be converted to an integer type using reinterpret_cast. This will only compile if the destination type is long enough. The result is implementation-defined and typically yields the numeric address of the byte in memory that the pointer poin...

Highcharts.setOptions({ lang: { loading: 'Aguarde...', months: ['Janeiro', 'Fevereiro', 'Março', 'Abril', 'Maio', 'Junho', 'Julho', 'Agosto', 'Setembro', 'Outubro', 'Novembro', 'Dezembro'], weekdays: ['Domingo', 'Segunda', 'Terça', 'Quarta', 'Quinta', 'Sex...

Highcharts.setOptions({ lang: { loading: 'Загрузка...', months: ['Январь', 'Февраль', 'Март', 'Апрель', 'Май', 'Июнь', 'Июль', 'Август', 'Сентябрь', 'Октябрь', 'Ноябрь', 'Декабрь'], weekdays: ['Воскресенье', 'Понедельник', 'Вторник', 'Среда', 'Четверг', 'П...

Highcharts.setOptions({ lang: { decimalPoint: ',', thousandsSep: '.', loading: 'Daten werden geladen...', months: ['Januar', 'Februar', 'März', 'April', 'Mai', 'Juni', 'Juli', 'August', 'September', 'Oktober', 'November', 'Dezember'], ...

Highcharts.setOptions({ lang: { loading: 'Yükleniyor...', months: ['Ocak', 'Şubat', 'Mart', 'Nisan', 'Mayıs', 'Haziran', 'Temmuz', 'Ağustos', 'Eylül', 'Ekim', 'Kasım', 'Aralık'], weekdays: ['Pazar', 'Pazartesi', 'Salı', 'Çarşamba', 'Perşembe', 'Cuma', 'Cum...

Highcharts.setOptions({ lang: { loading: 'Betöltés...', months: ['január', 'február', 'március', 'április', 'május','június', 'július', 'augusztus', 'szeptember', 'október', 'november', 'december'], shortMonths: ['jan', 'febr', 'márc', 'ápr', 'má...

Highcharts.setOptions({ lang: { loading: 'Chargement...', months: ['janvier', 'février', 'mars', 'avril', 'mai', 'juin', 'juillet', 'août', 'septembre', 'octobre', 'novembre', 'décembre'], weekdays: ['dimanche', 'lundi', 'mardi', 'mercredi', 'jeudi', 'vend...

An XML document can contain a DTD. DTD stands for Document Type Declaration. A DTD begins with <!DOCTYPE root-element-name > where doc-element-name must match the name of the so-called document element (the one element at the top-level). <?xml version="1.0"?> <!DOCTYPE doc...

To view line numbers from Default view enter :set number To hide line numbers :set nonumber There is also a shortcut for above. nu is same as number. :set nonu To hide line numbers, we can also use :set nu!

int main (void) { const int foo_readonly = 10; int *foo_ptr; foo_ptr = (int *)&foo_readonly; /* (1) This casts away the const qualifier */ *foo_ptr = 20; /* This is undefined behavior */ return 0; } Quoting ISO/IEC 9899:201x, section 6.7.3 §2: If an attempt i...

Add-ons: Firefox add-ons are generally grouped into Extensions, and then "other types" of Firefox add-ons. Extensions Extensions allow Firefox to be customized by adding to or modifying the functionality of Firefox. Some of the types of things which can be done with extensions include:...

Format strings may contain named placeholders that are interpolated using keyword arguments to format. Using a dictionary (Python 2.x) >>> data = {'first': 'Hodor', 'last': 'Hodor!'} >>> '{first} {last}'.format(**data) 'Hodor Hodor!' Using a dictionary (Python 3.2+) >&gt...