Tutorial by Examples: l

Who says you cannot throw multiple exceptions in one method. If you are not used to playing around with AggregateExceptions you may be tempted to create your own data-structure to represent many things going wrong. There are of course were another data-structure that is not an exception would be mor...

SkipWhile() is used to exclude elements until first non-match (this might be counter intuitive to most) int[] list = { 42, 42, 6, 6, 6, 42 }; var result = list.SkipWhile(i => i == 42); // Result: 6, 6, 6, 42

You can get list of available commands by following way: >>> python manage.py help If you don't understand any command or looking for optional arguments then you can use -h argument like this >>> python manage.py command_name -h Here command_name will be your desire command...

explode and strstr are simpler methods to get substrings by separators. A string containing several parts of text that are separated by a common character can be split into parts with the explode function. $fruits = "apple,pear,grapefruit,cherry"; print_r(explode(",",$fruits))...

$ react-native -v Example Output react-native-cli: 0.2.0 react-native: n/a - not inside a React Native project directory //Output from different folder react-native: react-native: 0.30.0 // Output from the react native project directory

In the app folder find package.json and modify the following line to include the latest version, save the file and close. "react-native": "0.32.0" In terminal: $ npm install Followed by $ react-native upgrade

Pass an open file object from Python to C extension code. You can convert the file to an integer file descriptor using PyObject_AsFileDescriptor function: PyObject *fobj; int fd = PyObject_AsFileDescriptor(fobj); if (fd < 0){ return NULL; } To convert an integer file descriptor back ...

You can also pattern match on Elixir Data Structures such as Lists. Lists Matching on a list is quite simple. [head | tail] = [1,2,3,4,5] # head == 1 # tail == [2,3,4,5] This works by matching the first (or more) elements in the list to the left hand side of the | (pipe) and the rest of the ...

if true do "Will be seen since condition is true." end if false do "Won't be seen since condition is false." else "Will be seen. end unless false do "Will be seen." end unless true do "Won't be seen." else ...

Open the Settings or Preferences dialog: On Windows or Linux, select File > Settings from the main menu. On Mac OSX, select Android Studio > Preferences from the main menu. Navigate to Build, Execution, Deployment > Compiler. In the text field next to Command-line Options, enter...

Keyword lists are tuples of key/value, generally used as options for a function call. [{:a, 1}, {:b, 2}] // creates a non-empty keyword list Keyword lists can have the same key repeated more than once. [{:a, 1}, {:a, 2}, {:b, 2}] [{:a, 1}, {:b, 2}, {:a, 2}] Keys and values can be any type: ...

CountDownLatch A synchronization aid that allows one or more threads to wait until a set of operations being performed in other threads completes. A CountDownLatch is initialized with a given count. The await methods block until the current count reaches zero due to invocations of the count...

When the x86 Arithmetic Logic Unit (ALU) performs operations like NOT and ADD, it flags the results of these operations ("became zero", "overflowed", "became negative") in a special 16-bit FLAGS register. 32-bit processors upgraded this to 32 bits and called it EFLAGS, ...

Detailed instructions on Joomla installation can be found on its official website documentation.

Detailed instructions on getting joomla3.0 set up or installed.

Classpath requirements Eclipselink The Eclipselink and JPA API need to be included. Example Maven dependencies: <dependencies> <dependency> <groupId>org.eclipse.persistence</groupId> <artifactId>eclipselink</artifactId> <version>2.6.3&lt...

Optional parameters can be specified after required parameters, by using &OPTIONAL keyword. There may be multiple optional parameters after it. (defun foobar (x y &optional z) (format t "X (~s) and Y (~s) are required.~@ Z (~s) is optional.~%" x y z)) ...

The &AUX keyword can be used to define local variables for the function. They are not parameters; the user cannot supply them. &AUX variables are seldomly used. You can always use LET instead, or some other way of defining local variables in the function body. &AUX variables have the a...

Functions always establish a block around the body. This block has the same name as the function name. This means you can use RETURN-FROM with this block name to return from the function and return values. You should avoid returning early whenever possible. (defun foobar (x y) (when (oddp x) ...

Simple split of an IP number string. > (lispworks:split-sequence "." "127.0.0.1") ("127" "0" "0" "1") Simple split of an URL: > (lispworks:split-sequence ".:/" "http://127.0.0.1/foo/bar.html" ...