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For example, if you need to load data into two databases, you can run the loads in parallel (instead of loading into the first – and then replicating into the second). Sometimes processing must take place sequentially. For example, dimensional (reference) data are needed before one can get and validate the rows for main "fact" tables.
For example, one could define a dictionary having a string "toast" mapped to the integer 42 or vice versa. The keys in a dictionary must be of an immutable Python type, such as an integer or a string, because under the hood they are implemented via a hash function. This makes for much faster lookup times, but requires keys not change.
In computer programming, lazy initialization is the tactic of delaying the creation of an object, the calculation of a value, or some other expensive process until the first time it is needed.
In computer science, an associative array, map, symbol table, or dictionary is an abstract data type that stores a collection of (key, value) pairs, such that each possible key appears at most once in the collection. In mathematical terms, an associative array is a function with finite domain. [1] It supports 'lookup', 'remove', and 'insert ...
In computing, a hash table is a data structure that implements an associative array, also called a dictionary or simply map; an associative array is an abstract data type that maps keys to values. [2] A hash table uses a hash function to compute an index, also called a hash code, into an array of buckets or slots, from which the desired value ...
A view of an empty chair inside of a sex worker's booth, in Antwerp, Belgium, Tuesday, Nov. 3, 2020. (AP Photo/Virginia Mayo, File) (ASSOCIATED PRESS)
Melham told CBS News he used the instance as an example of what the drones may be looking for. "My point is, they are flying in a grid-like pattern, in my opinion, sniffing for something," he said.
For example, Mr. And Mrs. John Kelly. But Senning explained you can simply address a couple by keeping their names on the same line of an address. “It doesn't matter who comes first. That's a ...