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Topic: Boolean value


  
  Core JavaScript Reference: Boolean
The Boolean object is an object wrapper for a boolean value.
For example, a Boolean object whose value is false is treated as the primitive value false, and a Boolean object whose value is true is treated as the primitive value true in conditional tests.
For Boolean objects and values, the built-in toString method returns the string "true" or "false" depending on the value of the boolean object.
www.nusphere.com /kb/jscoreref/boolean.html   (600 words)

  
 Appendix A3: Java's boolean types   (Site not responding. Last check: 2007-11-02)
The general conclusion from this section is that because boolean expressions are essential to the correct operation of a piece of software every one should be very carefully constructed and validated on paper before being subject to demonstration and testing.
Boolean values can be output as a part of a System.out.print() action, being displayed as the literal 'true' or 'false'.
It does not normally make sense to input a boolean value directly, instead a boolean value can be set from a relational expression or action after a value of some other type has been input.
www.scism.sbu.ac.uk /jfl/Appa/appa3.html   (860 words)

  
 Boolean datatype - Wikipedia, the free encyclopedia
In computer science, the Boolean datatype, sometimes called the logical datatype, is a primitive datatype having two values: one and zero (which are equivalent to true and false).
In the C programming language, there is no Boolean type provided in the C89 (but there is one in C99), but instead true/false values are determined by comparing a value to zero.
Boolean oprators and boolean built-in types always return a True or False value except for the operators "or" and "and" which return one of their operands (from left to right, the first operand that determines the boolean value of the expression).
en.wikipedia.org /wiki/Boolean_datatype   (997 words)

  
 Boolean Logic
Values are either on or off - corresponding directly to whether a switch is on or off and to whether a wire is connected to a power source or not.
(A boolean function is just one in which all the inputs are boolean values, and the output is a boolean value.) Sum-of-products is a method you can use create these gate systems.
For each input in that truth table row with value 0, draw a wire from that input to a NOT gate and then another wire from the output of the NOT gate to the AND gate.
www.cs.princeton.edu /~lworthin/126/precepts/boolean.html   (1942 words)

  
 Boolean - Wikipedia, the free encyclopedia
An evaluation that results in either of the truth values 'true' or 'false'.
A Boolean value is a truth value, either 'true' or 'false', often coded 1 and 0, respectively.
In computer science, "Boolean" is a datatype, usually a primitive datatype.
en.wikipedia.org /wiki/Boolean   (193 words)

  
 JavaBat If Boolean
See also the associated live boolean practice problems to practice boolean logic code or study for an exam.
Boolean expressions stop evaluating as soon as the result is clear.
Writing a method that returns a boolean is just like writing any method that returns value, but ultimately we are just returning either true or false.
javabat.com /doc/ifboolean.html   (3314 words)

  
 MLML System.Boolean API Documentation
The definition of what constitutes an object's "value" is up to the implementer of the type, but it is typically some or all of the data stored in the instance variables of the object.
A hash function is used to quickly generate a number (a hash code) corresponding to the value of an object.
Although there are no exact requirements for the format of the returned string, it should as much as possible reflect the value of the object as perceived by the user.
www.o-xml.org /projects/mlml/cli/System.Boolean.html   (2790 words)

  
 Class java.lang.Boolean
The Boolean class provides an object wrapper for Boolean data values, and serves as a place for boolean-oriented operations.
Since booleans are not objects in Java, they need to be "wrapped" in a Boolean instance.
Constructs a Boolean object initialized to the value specified by the String parameter.
www.public.iastate.edu /~java/docs/api/java.lang.Boolean.html   (203 words)

  
 Tcl_BooleanObj(3) Manual Page
If the integer is nonzero, the boolean object is set to 1; otherwise the boolean object is set to 0.
Both of these procedures set the object to have the boolean value (0 or 1) specified by boolValue; if boolValue is nonzero, the object is set to 1, otherwise to 0.
Both procedures set the object's type to be boolean and assign the boolean value to the object's internal representation longValue member.
h30097.www3.hp.com /demos/ossc/man-html/man7/Tcl_NewBooleanObj.3.html   (421 words)

  
 Return Boolean Evaluations
Boolean expressions (a > b) evaluate to a boolean value -- if your method needs to return it, then there's no need to have an if statement.
Here it is very clear that you are specifically returning one of two values and are selecting which value based on the expression.
So many students just can't understand that booleans are values just like any other type that I really wonder about their understanding of computing at all.
c2.com /cgi/wiki?ReturnBooleanEvaluations   (1422 words)

  
 DevGuru JavaScript OBJECT: Boolean
The Boolean object is an object wrapper for a Boolean value and is constructed with the above Boolean constructor.
Any Boolean object that is passed to a conditional statement (except those with an initial value of null or undefined) evaluates to true.
In JavaScript 1.3 and later versions, don't use a Boolean object instead of a Boolean primitive, nor should you use a Boolean object to convert a non-Boolean value to a Boolean one.
www.csis.ul.ie /Modules/Old-cs5652/jstutorial/js/boolean.html   (315 words)

  
 : Class Boolean
The value of the returned string is either
the value of this object as a string.
If the value is false then 1237 is returned.
www.parallax.com /javelin/doc/java/lang/Boolean.html   (74 words)

  
 Working with Expressions, 8 of 11
Boolean expressions can compare data of any type as long as both parts of the expression have the same basic data type.
If the value is greater than 20,000, then the statement is true; if the value is less than or equal to 20,000, then the statement is false.
Values are not compared in the same dimension based on their textual values.
www.stanford.edu /dept/itss/docs/oracle/9i/olap.920/a95298/express8.htm   (1557 words)

  
 Sample Lab Webpage - Control of Flow
Boolean values should really be discussed as a data type in Java; it is discussed here, because it is often used with the
Boolean values are unique in that they can be only one of two possible values:
Following are some statements which give you some ideas of how else the boolean value can be used in your Java programs.
www.cs.uregina.ca /Style/sample.html   (562 words)

  
 XML Path Language (XPath) 2.0
For this purpose, two values are considered to represent the same outcome if their items are pairwise the same, where nodes are the same if they have the same identity, and values are the same if they are equal and have exactly the same type.
The string value of a node must be a valid lexical representation of the typed value of the node, but the node is not required to preserve the string representation from the original source document.
The string value of a document node is formed by concatenating the string values of all its descendant text nodes, in document order.
www.w3.org /TR/xpath20   (10867 words)

  
 PHP Manual: Booleans
The boolean type was introduced in PHP 4.
<?php // == is an operator which test // equality and returns a boolean if ($action == "show_version") { echo "The version is 1.23"; } // this is not necessary...
However, in most cases you do not need to use the cast, since a value will be automatically converted if an operator, function or control structure requires a
www.nusphere.com /kb/phpmanual/language.types.boolean.htm   (160 words)

  
 Demicron - Plug-in free Rich Media - Interactive 2D and Web3D - Streaming Video and Audio
This means that when the button is clicked, it will push the current Boolean value (which here is set to True at startup).
Step 7 - Connecting Boolean and If When the Boolean value has been sent out from the Boolean object we want the value to enter the If object, which then evaluates if the value is true or false.
The Boolean value is inverted and sent back to the Boolean object and is stored there.
www.demicron.com /support/learning/wf3/wirefusion/lesson2/index.html   (573 words)

  
 System.Boolean Structure
A Int32 containing a value that reflects the sort order of the current instance as compared to obj.
A Int32 value containing a hash code for the current instance.
Returns a String representation of the value of the current instance.
www.gnu.org /projects/dotgnu/pnetlib-doc/System/Boolean.html   (306 words)

  
 Boolean   (Site not responding. Last check: 2007-11-02)
* @return the primitive <code>boolean</code> value of this object.
* @param b the boolean to be converted
* represents the same <code>boolean</code> value as this object.
www.javaresearch.org /source/jdk142/java/lang/Boolean.java.html   (502 words)

  
 online C++ tutorial: Operators
A boolean value is one that can be either true or false.
Booleans and boolean operations are at the heart of programming.
In the case of the assignment operators, the return value is simply the value that it stored in the variable on the left-hand-side.
www.intap.net /~drw/cpp/cpp03_04.htm   (1734 words)

  
 Class w3c.www.dsig.Trivalue
Tri-valued logic is boolean logic extended by a third state called 'unknown.' More information about trivalued logic TBD.
Int value defined to indicate the state false.
The string "true" is mapped to true, "false" to false, all else to unknown.
www.w3.org /PICS/refcode/Parser/javadocs/w3c.www.dsig.Trivalue.html   (612 words)

  
 man: Tcl_SetBooleanObj
Both pro- cedures set the object's type to be boolean and assign the boolean value to the object's internal representation longValue member.
Objects having a string representation equal to any of 0, false, no, or off have a boolean value 0; if the string representation is any of 1, true, yes, or on the boolean value is 1.
Any of these string values may be abbreviated, and upper-case spellings are also acceptable.
www.hmug.org /man/3/Tcl_SetBooleanObj.php   (442 words)

  
 Winston Prakash's Weblog
However, this is problematic if you are using database that does not support boolean type and you are using a SMALLINT to represent the true (1) and false (0) state.
When the value of the selected property is equal to the value of the selectedValue property, the checkbox is in a selected state and a checkmark is displayed.
In this case the value of the selected property is assigned the value of the selectedValue property.
blogs.sun.com /winston/entry/non_boolean_checkbox   (1379 words)

  
 Server-Side JavaScript Reference
object is an object wrapper for a boolean value.
object whose value is false is treated as the primitive value false, and a
method automatically when a Boolean is to be represented as a text value or when a Boolean is referred to in a string concatenation.
docs.sun.com /source/816-6410-10/boolean.htm   (268 words)

  
 Boolean Members (System)
Compares this instance to a specified object or Boolean and returns an indication of their relative values.
Returns a value indicating whether this instance is equal to a specified object or Boolean.
Returns a byte with a value equivalent to either true or false, depending on the value of this instance of Boolean.
msdn2.microsoft.com /en-us/library/system.boolean_members.aspx   (324 words)

  
 Docjar: java/lang/Boolean.java
/** 60 * This field is a Boolean object representing the 61 * primitive value true.
/** 68 * This field is a Boolean object representing the 69 * primitive value false.
In general the use of the static 92 * method valueof(boolean) is more efficient since it will 93 * not create a new object.
www.docjar.com /html/api/java/lang/Boolean.java.html   (926 words)

  
 Boolean (Flex™ 2 Language Reference)
A Boolean object is a data type that can have one of two values, either
Use the Boolean class to retrieve the primitive data type or string representation of a Boolean object.
To create a Boolean object, you can use the constructor or the global function, or assign a literal value.
livedocs.macromedia.com /flex/2/langref/Boolean.html   (388 words)

  
 JavaScript datatype: Boolean   (Site not responding. Last check: 2007-11-02)
object when you need to convert a non-boolean value to a boolean value.
method that is automatically called when it is to be represented as a text value or when an object is referred to in a string concatenation.
depending on the value of the boolean object.
webpages.marshall.edu /~dementiev/ist263/examples/js_boolean.html   (115 words)

  
 ShortKeyBooleanMap (Primitive Collections for Java API v1.2)
This interface represents maps from short values to boolean values.
the value that the specified key maps to, or a default value, if no such mapping exists.
The size is defined as the number of mappings from keys to values.
pcj.sourceforge.net /docs/api/bak/pcj/map/ShortKeyBooleanMap.html   (754 words)

  
 Boolean expression - Wikipedia, the free encyclopedia (via CobWeb/3.1 planetlab2.isi.jhu.edu)   (Site not responding. Last check: 2007-11-02)
A Boolean expression is an expression that results in a Boolean value, that is, TRUE or FALSE.
For example, the value for 5 > 3 is TRUE, the value for "An apple is not a fruit" is FALSE.
Boolean expressions are used also in document retrieval.
en.wikipedia.org.cob-web.org:8888 /wiki/Boolean_expression   (132 words)

  
 flash.text.TextSnapshot (Flex™ 2 Language Reference)
— A value that is one greater than the index of the last character to be examined.
These values are only available if the font used by the character is embedded in the SWF file.
To ensure that an index value is returned, you can force the Flash authoring tool to include the character metric information for a font.
www.adobe.com /livedocs/flex/2/langref/flash/text/TextSnapshot.html   (1608 words)

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