at:tutorial:basic
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| at:tutorial:basic [2011/05/23 13:36] – tvcutsem | at:tutorial:basic [2020/02/09 16:48] – * elisag | ||
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| ====== Functional and Imperative Programming ====== | ====== Functional and Imperative Programming ====== | ||
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| AmbientTalk borrows its block syntax from languages like Smalltalk and Self, where the role of the curly braces is played by square brackets, i.e. '' | AmbientTalk borrows its block syntax from languages like Smalltalk and Self, where the role of the curly braces is played by square brackets, i.e. '' | ||
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| + | <note important> | ||
| + | Be careful when nesting calls to keyworded functions: a call of the form '' | ||
| + | </ | ||
| ===== Native Data Types ===== | ===== Native Data Types ===== | ||
| The basic data types in AmbientTalk are numbers (i.e. integers), fractions (i.e. double precision floating point numbers), text (i.e. strings), tables (i.e. arrays) and booleans. In fact, instances of these data types are nothing but objects and as such, they respond to a variety of native methods. Objects will be the subject of the next chapter of the tutorial. This section explains the basic data types and includes some examples how to manipulate them. The complete list of methods can be found in the language reference. | The basic data types in AmbientTalk are numbers (i.e. integers), fractions (i.e. double precision floating point numbers), text (i.e. strings), tables (i.e. arrays) and booleans. In fact, instances of these data types are nothing but objects and as such, they respond to a variety of native methods. Objects will be the subject of the next chapter of the tutorial. This section explains the basic data types and includes some examples how to manipulate them. The complete list of methods can be found in the language reference. | ||
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| ==== Numerical data types ==== | ==== Numerical data types ==== | ||
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| Numbers also support some useful iterator methods such as: | Numbers also support some useful iterator methods such as: | ||
| < | < | ||
| - | >6.to: 0 step: 2 do: { |i| system.println(i) } | + | >1.to: 5 do: { |i| system.println(i)} |
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| + | 2 | ||
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| + | >1.to: 5 step: 2 do: { |i| system.println(i)} | ||
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| + | 5 | ||
| + | > | ||
| 6 | 6 | ||
| 4 | 4 | ||
| 2 | 2 | ||
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| ===== Control Flow Constructs ===== | ===== Control Flow Constructs ===== | ||
| - | Control flow constructs are defined in the lexical root of AmbientTalk. The lexical root is an object containing globally visible native methods (i.e. it is the top-level environment). We have already seen in the previous sections examples of use of the foreach and if/then structures. A list of traditional control flow structures defined in AmbientTalk is shown below: | + | Control flow constructs are defined in the "lexical root". The lexical root is an object containing globally visible native methods (i.e. it is the top-level environment). We have already seen in the previous sections examples of use of the foreach and '' |
| < | < | ||
| if: booleanCondition then: consequentClosure | if: booleanCondition then: consequentClosure | ||
at/tutorial/basic.txt · Last modified: 2020/02/09 22:05 by elisag