Tutorial by Examples: lit

It's a bad idea to hard code paths in your application. One should always use relative urls so that your code can work seamlessly across different machines. The best way to set this up is to define a variable like this import os BASE_DIR = os.path.dirname(os.path.dirname(__file__)) Then use th...

Splits a string expression using a character separator. Note that STRING_SPLIT() is a table-valued function. SELECT value FROM STRING_SPLIT('Lorem ipsum dolor sit amet.', ' '); Result: value ----- Lorem ipsum dolor sit amet.

You can split a string into an array of parts, divided by a separator character. NSString * yourString = @"Stack,Exchange,Network"; NSArray * yourWords = [yourString componentsSeparatedByString:@","]; // Output: @[@"Stack", @"Exchange", @"Network&quot...

Calling .Equals() on a delegate compares by reference equality: Action action1 = () => Console.WriteLine("Hello delegates"); Action action2 = () => Console.WriteLine("Hello delegates"); Action action1Again = action1; Console.WriteLine(action1.Equals(action1)) // True ...

One feature provided for free by case classes is an auto-generated equals method that checks the value equality of all individual member fields instead of just checking the reference equality of the objects. With ordinary classes: class Foo(val i: Int) val a = new Foo(3) val b = new Foo(3) prin...

Interleave your y or x values with NaNs x = [1:5; 6:10]'; x(3,2) = NaN x = 1 6 2 7 3 NaN 4 9 5 10 plot(x)

Literal format strings were introduced in PEP 498 (Python3.6 and upwards), allowing you to prepend f to the beginning of a string literal to effectively apply .format to it with all variables in the current scope. >>> foo = 'bar' >>> f'Foo is {foo}' 'Foo is bar' This works wi...

SELECT * FROM Employees This statement will return all the rows from the table Employees. Id FName LName PhoneNumber ManagerId DepartmentId Salary Hire_date CreatedDate ModifiedDate 1 James Smith 1234567890 NULL 1 1000 01-01-2002 0...

Standard Haskell allows you to write integer literals in decimal (without any prefix), hexadecimal (preceded by 0x or 0X), and octal (preceded by 0o or 0O). The BinaryLiterals extension adds the option of binary (preceded by 0b or 0B). 0b1111 == 15 -- evaluates to: True

$string = "0| PHP 1| CSS 2| HTML 3| AJAX 4| JSON"; //[0-9]: Any single character in the range 0 to 9 // + : One or more of 0 to 9 $array = preg_split("/[0-9]+\|/", $string, -1, PREG_SPLIT_NO_EMPTY); //Or // [] : Character class // \d : Any digit // + : One or more ...

For instance, a computation involving commands to read and write from the prompt: First we describe the "commands" of our computation as a Functor data type {-# LANGUAGE DeriveFunctor #-} data TeletypeF next = PrintLine String next | ReadLine (String -> next) derivin...

JavaScript has four different equality comparison operations. SameValue It returns true if both operands belong to the same Type and are the same value. Note: the value of an object is a reference. You can use this comparison algorithm via Object.is (ECMAScript 6). Examples: Object.is(1, 1); ...

public function facebook() { return $this->socialite->driver('facebook')->stateless()->redirect()->getTargetUrl(); } This will return the URL that the consumer of the API must provide to the end user to get authorization from Facebook.

let string1 = "Hello" //simple string let string2 = "Line\nNewLine" //string with newline escape sequence let string3 = @"Line\nSameLine" //use @ to create a verbatim string literal let string4 = @"Line""with""quoutes inside" //dou...

Just add the using at the beginning and the [WebMethod] decorator to the static method to be called in the aspx page: using System.Web.Services; public partial class MyPage : System.Web.UI.Page { [WebMethod] public static int GetRandomNumberLessThan(int limit) { var r = ...

The library CL-PPCRE provides the function split which allows us to split strings in substrings that match a regular expression, discarding the parts of the string that do not. (cl-ppcre:split "\\." "127.0.0.1") ;; => ("127" "0" "0" "1&quot...

In C#, there are two different kinds of equality: reference equality and value equality. Value equality is the commonly understood meaning of equality: it means that two objects contain the same values. For example, two integers with the value of 2 have value equality. Reference equality means that ...

Use .split to go from strings to an array of the split substrings: var s = "one, two, three, four, five" s.split(", "); // ["one", "two", "three", "four", "five"] Use the array method .join to go back to a string: s.split(&...

Horizontally vim -o file1.txt file2.txt Vertically vim -O file1.txt file2.txt You may optionally specify the number of splits to open. The following example opens two horizontal splits and loads file3.txt in a buffer: vim -o2 file1.txt file2.txt file3.txt

Oracle's CONNECT BY functionality provides many useful and nontrivial features that are not built-in when using SQL standard recursive CTEs. This example replicates these features (with a few additions for sake of completeness), using SQL Server syntax. It is most useful for Oracle developers findin...