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Topic: Associative array


  
 Associative array - Wikipedia, the free encyclopedia
An associative array (also dictionary, finite map, map, lookup table, and in query-processing an index or index file) is an abstract data type composed of a collection of keys and a collection of values, where each key is associated with one value.
Associative arrays are known by many names in different programming languages.
From the perspective of a programmer using an associative array, it can be viewed as a generalization of an array: While a regular array maps integers to arbitrarily typed objects (integers, strings, pointers, and, in an OO sense, objects), an associative array maps arbitrarily typed objects to arbitrarily typed objects.
http://en.wikipedia.org/wiki/Associative_array   (2693 words)

  
 Hexapedia - Array
In computer programming, an array, also known as a vector or list, is one of the simplest data structures.
In the C programming language, one-dimensional character arrays are used to store null-terminated strings, so called because the end of the string is indicated with a special reserved character called a null character ('\0') (see also C string).
Arrays of arrays are also of value in programming languages that only supply one-dimensional arrays as primitives.
http://www.hexafind.com/encyclopedia/array   (1362 words)

  
 [No title]
For associative arrays, the key part of each pair is compared to the pattern, and the first matching key found is the result.
When an array parameter is refer­ enced as `$name' (with no subscript) it evaluates to `$name[*]', unless the KSH_ARRAYS option is set in which case it evaluates to `${name[0]}' (for an associative array, this means the value of the key `0', which may not exist even if there are values for other keys).
K On an associative array this is like `k' but returns all values where exp is matched by the keys.
http://www.ibiblio.org/gferg/ldp/man/man1/zshparam.1.html   (5713 words)

  
 Perl Overview
Associative arrays are arrays that are indexed by strings.
The value of an array in a scalar context is the length of the array.
The index string is known as the key and the datum associated with a key is called the value.
http://www.scripps.edu/mb/olson/papers/avstool/node2.html   (1076 words)

  
 Associative Arrays
Associative arrays basically store tables of information where the lookup is the right hand key (usually a string) to an associated scalar value.
Associative arrays are a very useful and commonly used feature of Perl.
We would declare a Perl associative array to perform this lookup as follows:
http://www.cs.cf.ac.uk/Dave/PERL/node30.html   (113 words)

  
 Array Functions
Arrays are also a big part of the Perl language and Perl has a lot of functions to help you work with them.
array, the environment of the current process is changed, not that of the parent.
In an array context, it returns a list of the things that were found.
http://www.cs.cf.ac.uk/Dave/PERL/node57.html   (900 words)

  
 ONLamp.com -- Arrays in PHP: Part 2
Associative arrays are identical to any other type of array with one major difference -- their index values.
For example, in an associative array the index "foo" can be used to store the value "bar".
Creating and working with multidimensional arrays can be done a number of ways -- all of which we introduced in part 1 of this series.
http://www.onlamp.com/pub/a/php/2001/06/21/php_foundations.html   (777 words)

  
 The PHP Associative Array - PHP
An associative array also uses index keys but these keys are not numeric as in the example above.
In the previous tutorial, you learned that an array is a variable that stores several values or elements of data organized by index keys.
You use the array square brackets to add a key-value pair to the array or to create an array.
http://www.bellaonline.com/ArticlesP/art31316.asp   (208 words)

  
 Perl Basics: Associative Arrays
Associative arrays are very handy when you are trying to get input from forms on a web page.
This indicates that what follows is an associative array, so the interpreter knows to use the keys and values, rather than assign index numbers to each string.
Like a regular array, you can add a value to an associative array by simply defining a new value in your script.
http://www.pageresource.com/cgirec/ptut12.htm   (492 words)

  
 Day 10 -- Associative Arrays
Associative arrays can be used to simulate a wide variety of data structures, including linked lists, structures, trees, and databases.
Finally, an associative array can be created from the return value of a built-in function or user-defined subroutine that returns a list.
A program that uses an associative array to represent a binary tree.
http://docs.rinet.ru/P7/ch10.htm   (6532 words)

  
 PERL -- Array and List Functions
Note that, since $_ is a reference into the array value, it can be used to modify the elements of the array.
There is a single iterator for each associative array, shared by all each(), keys() and values() function calls in the program.
When the array is entirely read, a null array is returned (which when assigned produces a FALSE (0) value).
http://www-2.cs.cmu.edu/People/rgs/pl-exp-arr.html   (1284 words)

  
 Program 3
When a new value is stored in the associative array your program will see if there is already a value stored with the given index.
In an ordinary array there is no need to store the index, but in an associative array the index must be stored.
Anything which is to be stored in the associative array must have both an index and a value.
http://cs.gmu.edu/~dnord/cs310/program3.html   (1450 words)

  
 PHP: Array Functions - Manual
There are specific database handling functions for populating arrays from database queries, and several functions return arrays.
this array are always used on form querys...
I use it to write an array to file.
http://www.php.net/manual/en/ref.array.php   (2185 words)

  
 PHPBuilder.com - recursively filter two or more associative array..help~
While in that loop, do an array_search() on the other array for the current value of the first array.
waahh!!..its harddd!!!..it is ok if my arrays are not that complicated..it seems that i have multidimensional associative array combine with index array...ahahhahaaa..that's why it is hard for me to find any example..all the example always give me problemss..
You want to merge the arrays such that the resulting array contains entries that are unique, where uniqueness is a user defined property.
http://www.phpbuilder.com/board/showthread.php?t=10319473   (812 words)

  
 array
An external index, such as a hash table or inverted index may help make an array search quicker and speed overall processing if the array is not changed often.
Paul E. Black, "array", from Dictionary of Algorithms and Data Structures, Paul E. Black, ed., NIST.
Jennifer E. Elaan's fast array algorithm, equivalent to Knuth's.
http://www.nist.gov/dads/HTML/array.html   (180 words)

  
 The AWK Manual - Array Intro
superficially resemble arrays in other programming languages; but there are fundamental differences.
Only the values are stored; the indices are implicit from the order of the values.
But you cannot use one name in both ways (as an array and as a variable) in one
http://www.cs.uu.nl/~piet/docs/nawk/nawk_80.html   (478 words)

  
 associative array
Paul E. Black, "associative array", from Dictionary of Algorithms and Data Structures, Paul E. Black, ed., NIST.
The simplest, but slowest, implementation is to do a linear search over the array for a match.
If that is too slow, and you access the array by number, too, you must create and maintain an index into the array.
http://www.nist.gov/dads/HTML/assocarray.html   (131 words)

  
 WebDeveloper.com - Associative Array Question
I believe I need to use an associative array where the key is the ID and the value is an array consisting of the sums of the other columns.
find the array matching the key and add the values of the current row to the columns of the row that already exists in the associative array
I'm thinking for my algorithm I need to say:
http://www.webdeveloper.com/forum/printthread.php?t=50781   (428 words)

  
 The Associative Array Object's Help File
The Associative Array object's set-up dialog allows you to set the object's data to be global.
This condition returns true if the array has been modified since the last time the a file was saved or loaded or since the last time the array was cleared.
Addresses: The Associative Array Object allows you to have indirect access to locations in memory (that is, addresses of data).
http://www.engr.uconn.edu/~mjg01f01/bumderland/objects/assarray.html   (4031 words)

  
 Associative Arrays
Another common use for arrays is to store tables of data.
Tcl, like most scripting languages (Perl, Python, PHP, etc...) supports associative arrays (also known as "hash tables") in which the index value is a string.
In the example below we use an array to store a simple database of names.
http://www.tcl.tk/man/tcl8.5/tutorial/Tcl22.html   (329 words)

  
 Sort Associative Multidimensional Array by Multiple Keys - Dev Shed
Another option would be to just say to hell with it and cache the query each time it's sorted differently.
It would be very simple to sort at the SQL level, but I'm not sure I want to have every query cached for each sort method, plus ascending, descending, etc. So, I'd rather sort the cached array if possible.
you just write a callback function that compares 2 things in your array and returns -1, 0, or 1.
http://forums.devshed.com/php-development-5/sort-associative-multidimensional-array-by-multiple-keys-291032.html   (569 words)

  
 Discussion Forums : Associative Array ...
What you will have to do is deconvolute your record type data structure into plsql associative arrays: one array per column.
In your example, since it's a PL/SQL Associate Array I'm still unable to perform SQL on it.
Yes, you can use Associative Arrays with the current versions of the ODP.
http://forums.oracle.com/forums/thread.jsp?forum=146&thread=205160&tstart=15&trange=15   (315 words)

  
 JavaScript Associative Arrays
Associative arrays give you another way to store information.
The downside is that these aren't as useful in a loop because they do not use numbers as the index value.
var my_cars= new Array() my_cars["cool"]="Mustang"; my_cars["family"]="Station Wagon"; my_cars["big"]="SUV";
http://www.pageresource.com/jscript/jarray2.htm   (309 words)

  
 [No title]
The "array slicing operator" returns an array with as many dimensions as it started with...so rectangular slicing isn't even an issue.
Today, my record on questions relating to arrays is about 0-2, so maybe there's some easy way to do this that I've missed (smirk) > > * What happens if you array slice a rectangular array and try to set it > > "by reference" to another array?
IMHO, this is an almost > > must-have feature...but be careful, Pavel (playful grin), because it > > won't look right to have end-exclusive syntax here, either > > How exactly do you slice an associative array?
http://www.digitalmars.com/drn-bin/wwwnews?D/3626   (383 words)

  
 WebDeveloper.com - Sorting associative array?
I know this would probably be easier using an enumerated array, but I prefer this method since it allows me fast lookups.
I was hoping there would be some generic function for sorting associative arrays...
Who can help me with a function to sort an associative array of which the values are objects:
http://www.webdeveloper.com/forum/showthread.php?threadid=88331   (823 words)

  
 Oracle Associative Array
Note: An associative array in PL/SQL is similar to its counterpart in Perl: An array indexed by a string rather than by an integer.
In so doing it also demonstrates how such an array is created, loaded, and referenced.
CREATE OR REPLACE PROCEDURE use_aa IS TYPE vtab IS TABLE OF VARCHAR2(20)
http://www.psoug.org/reference/associative_arrays.html   (64 words)

  
 Database Help Forum - Bulk Collect into Associative Array question
populate two other arrays with other column data from the same table.
You can turn the array into a nested table object type, and then query
> populate two other arrays with other column data from the same table.
http://www.connectforum.com/showthread.php?t=120857   (650 words)

  
 Smarty :: View topic - About loop in an associative array with {section}
An advantage of section is you can access other assigned arrays with the same loop var, much like for() vs. foreach()
but i can use the key-attribute to get a loop-var as a hook to access the corresponding values of other arrays than the loop-array.
The way showed in Smarty's manual doesn't work.
http://www.phpinsider.com/smarty-forum/viewtopic.php?p=12689   (813 words)

  
 JavaScript Associative Arrays [persistent.info]
In fact, it is better to create the associative array using the generic
I understand that the concept of associatvie array is fairly new to me, so it's maybe something simple that I'm missing.
I had read all those other links from google and I was wondering why sort() and join() didn't work!
http://persistent.info/archives/2004/08/27/js-associative-arrays   (594 words)

  
 Using an Associative Array
The map<> container is an example of an associated array.
The string is the key whose associated value is an int:
In this example, a map is used to translate the string value of an enumerator into its corresponding integral value.
http://www.devx.com/tips/Tip/5659   (213 words)

  
 Laszlo - associative array length
Array is an Object, so you can store non-numeric properties in an array, but only the numeric properties affect the length.
I can't access string indexes by the methods of array object (pop, shift, etc.).
I would like to use associative array, but when I insert a new element with string index, the length property of array is not modified.
http://www.laszlosystems.com/developers/community/forums/showthread.php?threadid=3337   (89 words)

  
 PHP Classes - Class: Associative array to XML
This class can parse a XML document and build an array structure with the information of the tags and data of the document.
The class can also generate a XML document from using the entry keys and values of the associative array.
There are not enough user ratings to display for this class.
http://www.phpclasses.org/browse/package/2286.html   (115 words)

  
 Atlanta, Georgia
Despite romantic associations, Atlanta has always been more a commercial city than an ante-bellum monument.
The team was founded in 1871 in Boston, Massachusetts as a National Association club, making it the oldest continuously operating sports franchise in North American sports.
The Braves won the World Series in 1995 and have had an unprecedented run of thirteen divisional championships since 1991.
http://www.info-pedia.net/about/atlanta_georgia   (4438 words)

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