Arrays
Let’s say, hypothetically, that you have an ordered list of values. (A rarity in software, I know, but bear with me.) You could use any old object to store those values, but arrays (which inherit the properties of the Array prototype) offer you several nice conveniences.[31] They also, as a practical matter, improve performance by hinting that the JavaScript runtime should allocate a sequential block of memory.
Arrays can be defined using JSON-style syntax:
| | mcFlys = ['George', 'Lorraine', 'Marty'] |
All arrays in JavaScript are dynamic, with (practically) unlimited length. So you could define the exact same array one piece at a time:
| | mcFlys = [] |
| | mcFlys[0] = 'George' |
| | mcFlys[1] = 'Lorraine' |
| | mcFlys[2] = 'Marty' |
The use of ...
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