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Associative array - Wikipedia, the free encyclopedia
An associative array (also associative container , map , mapping , dictionary , finite map , and in query-processing an index or index file ) is an abstract data type composed of a col...
en.wikipedia.org/wiki/Associative_array |
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Associative arrays give you another way to store information. Using associative arrays, you can call the array element you need using a string rather than a number, which is often easier to remember. The downside is that these aren't as useful in a loop because they do not use numbers as the index value.
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An introduction to the basics of Perl associative arrays. ... Associative arrays are yet another way to store variables in a group. Unlike a regular array, however, you get to use your own text strings to access elements in the array. Associative arrays are created with a set of key/value pairs.
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In this series of articles, we shall concentrate on working with associative arrays in Oracle PL/SQL. Even though I start with simple examples in the first article of this series, I shall introduce you (in my upcoming articles) to the power of much more advanced techniques using associative arrays with Oracle PL/SQL.
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Definition of associative array, possibly with links to more information and implementations. ... Definition: A collection of items that are randomly accessible by a key, often a string. ... If that is too slow, and you access the array by number, too, you must create and maintain an index into the array. The index is a...
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The other problem with using Arrays as associative arrays means you can no longer extend Array.prototype, which is what Prototype 1.5 does to great effect. Prototype did break Object associative arrays in 1.4 with additions to Object.prototype, something that is fixed in 1.5 after much wailing and gnashing of teeth.
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erik’s weblog » Blog Archive » Associative Arrays Must Die ... Using objects as associative arrays has its own set of problems too. Try: ... It’s not really fair to say that associative arrays are harmful when its the prototype methods causing the pain when using for-ins. I mean, on the same basis,
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These are called associative arrays. ... Notice that like list arrays each % sign has changed to a $ to access an individual element because that element is a scalar. Unlike list arrays the index (in this case the person's name) is enclosed in curly braces, the idea being that associative arrays are fancier than list arrays.
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you can also go through each element of an associative array. Suppose you want to go through the status values of all images. If the status of the image is 'mouseover' you want to call a function callFn() and pass the image name to it.
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Of course you could have different types of entries in a regular numbered array just as easily but since the numbering of the entries implies an order to those entries it is more natural to use numbered arrays for multiple occurrences of similar items and associative arrays where the items are different.
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