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JXA_JavaScript_for_Applications
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JXA_JavaScript_for_Applications [2016/01/05 18:59] ComplexPoint [Attaching reusable names to computations and their results:] |
JXA_JavaScript_for_Applications [2016/01/06 21:17] peternlewis deleted in favor of JavaScript for Automation |
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| Where AS uses the pattern: **set** *name* **to** *resultingValue* (and reserves **=** for testing equality), | Where AS uses the pattern: **set** *name* **to** *resultingValue* (and reserves **=** for testing equality), | ||
| - | JS uses one or more [[https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Statements/var|variable declaration statements]] | + | JS uses one or more [[https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Statements/var|variable declaration statements]] (and [[https://developer.mozilla.org/en-US/docs/Web/JavaScript/Equality_comparisons_and_sameness|tests equality]] with **===**) |
| In JS we can either: | In JS we can either: | ||
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| JavaScript gives us a lot of freedom, [[http://shop.oreilly.com/product/9780596517748.do|sometimes more than is helpful]]. Misspelled variable names, and accidental uses of the same globally visible name in different parts of a script are rich sources of puzzling bugs and wasted time. To use a less liberal but more helpful set of JavaScript rules, we can add the line **'use strict';** | JavaScript gives us a lot of freedom, [[http://shop.oreilly.com/product/9780596517748.do|sometimes more than is helpful]]. Misspelled variable names, and accidental uses of the same globally visible name in different parts of a script are rich sources of puzzling bugs and wasted time. To use a less liberal but more helpful set of JavaScript rules, we can add the line **'use strict';** | ||
| - | at the start of a function. When we do this, JavaScript checks that all of our variables are declared (and therefore 'local' – visible only to their containing functions, and also temporary – vanishing when a function is finished). If an undeclared variable is detected when the **'use strict';** statement has been added, we are given a helpful warning: | + | at the start of a function. When we do this, JavaScript checks that all of our variables are declared (and therefore 'local' – visible only to their containing functions, and also temporary – vanishing when the evaluation of a function is completed). If an undeclared variable name is detected when the **'use strict';** statement has been added, we are given a helpful warning: |
| {{::use-strictpng.png|}} | {{::use-strictpng.png|}} | ||
| + | ====Structuring collections – indexing by number, and by name=== | ||
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| + | ====Structuring computations – branching, repetition, and nested composition==== | ||
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| + | ====JSON for persistence – saving things between macro runs, and reading them straight back in==== | ||
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| + | =====The Automation interface===== | ||
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| + | ===Using the Standard Additions library==== | ||
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| + | ===Interacting with scriptable applications=== | ||
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| + | =====Using the Safari JSContexts Debugger (El Capitan onwards)===== | ||
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| + | =====The ObjC interface===== | ||
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| + | ===Basic file functions=== | ||
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| + | ===Clipboard functions=== | ||
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| + | ===Reading the documentation for simple ObjC functions=== | ||
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