42 lines
1.4 KiB
JavaScript
42 lines
1.4 KiB
JavaScript
//! This script simulates object-oriented programming (OOP) techniques using closures.
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// External variable that will be captured.
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let last_value = ();
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// Define object
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let obj1 = #{
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_data: 42, // data field
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get_data: || this._data, // property getter
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action: || print(`Data=${this._data}`), // method
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update: |x| { // property setter
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this._data = x;
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last_value = this._data; // capture 'last_value'
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this.action();
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}
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};
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if obj1.get_data() > 0 { // property access
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obj1.update(123); // call method
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} else {
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print("we have a problem here");
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}
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// Define another object based on the first object
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let obj2 = #{
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_data: 0, // data field - new value
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update: |x| { // property setter - another function
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this._data = x * 2;
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last_value = this._data; // capture 'last_value'
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this.action();
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}
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};
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obj2.fill_with(obj1); // add all other fields from obj1
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if obj2.get_data() > 0 { // property access
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print("we have another problem here");
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} else {
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obj2.update(42); // call method
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}
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print(`Should be 84: ${last_value}`);
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