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For example, in Java, any class that implements the Comparable interface has a compareTo method which either returns a negative integer, zero, or a positive integer, or throws a NullPointerException (if one or both objects are null). Similarly, in the .NET framework, any class that implements the IComparable interface has such a CompareTo method.
"PIC S9999", for example, would require a signed variable of four decimal digits precision. If specified as a binary field, this would select a 16-bit signed type on most platforms. ^i Smalltalk automatically chooses an appropriate representation for integral numbers.
In a formula, if the top wire carries x and the bottom wire carries y, then after hitting a comparator the wires carry ′ = (,) and ′ = (,), respectively, so the pair of values is sorted. [ 5 ] : 635 A network of wires and comparators that will correctly sort all possible inputs into ascending order is called a sorting network or Kruskal hub.
A classic example of a problem which a regular grammar cannot handle is the question of whether a given string contains correctly nested parentheses. (This is typically handled by a Chomsky Type 2 grammar, also termed a context-free grammar .)
Sorting a set of unlabelled weights by weight using only a balance scale requires a comparison sort algorithm. A comparison sort is a type of sorting algorithm that only reads the list elements through a single abstract comparison operation (often a "less than or equal to" operator or a three-way comparison) that determines which of two elements should occur first in the final sorted list.
An example is the compareTo method: a. compareTo (b) checks whether a comes before or after b in some ordering, but the way to compare, say, two rational numbers will be different from the way to compare two strings. Other common examples of binary methods include equality tests, arithmetic operations, and set operations like subset and union.
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A bistable multivibrator implemented as a comparator with hysteresis. In this configuration, the input voltage is applied through the voltage divider formed by R 1 {\displaystyle {R_{1}}} and R 2 {\displaystyle {R_{2}}} (which may be the source internal resistance) to the non-inverting input and the inverting input is grounded or referenced.