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It is an example of the generic concept of event-driven programming, that is popular in many other contexts than Java, for example, web browsers, or web servers. The events are primarily update events that cause user interface components to redraw themselves, or input events from input devices such as the mouse or keyboard.
The following code creates a variable called pos that holds a coordinate pair, and then manipulates this to re-position all of the buttons on a card in a diagonal from top-left to bottom-right: on mouseUp put "100,100" into pos repeat with x = 1 to the number of card buttons set the location of card button x to pos add 15 to item 1 of pos end ...
The syntax for printing output in Jinja is using the double curly braces, for example {{ Hello, World! }}. Statements which set variables in jinja or those which do not have an output can be wrapped within {% and %}, using the set keyword. For example {% set foo = 42 %} sets a variable called foo with a value of 42.
The name read–eval–print loop comes from the names of the Lisp primitive functions which implement this functionality: The read function accepts an expression from the user, and parses it into a data structure in memory. For instance, the user may enter the s-expression (+ 1 2 3), which is parsed into a linked list containing four data ...
The following REBOL/Red code demonstrates callback use. As alert requires a string, form produces a string from the result of calculate; The get-word! values (i.e., :calc-product and :calc-sum) trigger the interpreter to return the code of the function rather than evaluate with the function. The datatype! references in a block!
Custom types allow the programmer to create custom types to represent data in a way that matches the problem domain. [24] Types can refer to other types, for example a List Int. Types are always capitalized; lowercase names are type variables. For example, a List a is a list of values of unknown type.
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It contains HTML, CSS and (optionally) JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components. As of May 2023, Bootstrap is the 17th most starred project (4th most starred library) on GitHub, with over 164,000 stars. [4] According to W3Techs, Bootstrap is used by 19.2% of all websites. [5]