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How to convert a binary representation of a string into byte array
The word " bi nary" means composed of two pieces. A binary operation is simply a rule for combining two values to create a new value. The most widely known binary operations are those learned in elementary school: Let's take a look at some creative binary operations. It is possible to define "new" binary operations. Sometimes, a binary operation on a finite set a set with a limited number of elements is displayed in a table which shows how the operation is to be performed.
A binary operation on a set is a calculation involving two elements of the set to produce another element of the set. Not true for all real numbers. Not true for all reals.
The table at the right shows the 16 possible answers using this operation. To read the table: The answer is the intersection point. What is 2 4? Unfortunately, you now need to check all of the other possibilities.
There is, however, a shorter way If the table is symmetric with respect to this line, the table is commutative. What is the identity element for the operation?
Find the single element that will always return the original value. The identity element is 4. You will have found the identity element when all of the values in its row and its column are the same as the row and column headings. Is associative for these values? Unfortunately, if you were asked the general question, "Is associative? Unlike the commutative property, there is NO shortcut for checking associativity when working with a table. But remember, it only takes one arrangement which does not work to show that associativity fails.