Im trying to understand how boolean logic works when I use NOT. To give an example using awk I have a text file containing CORE PORT CORE PORT COREPORT CORE COREPORT And I would like to remove all COREPORT lines. The way I thought I would do it was with (NOT CORE) AND (NOT PORT) eg awk '/!CORE/&&/!PORT/{print}' But when I try it...
Which is a better way to select ans and quest from the table? SELECT * FROM tablename WHERE option='ans' OR option='quest'"; OR SELECT * FROM tablename WHERE option='ans' AND option='quest'"; Thanks so much! ...
I need to write a boolean logic parser which will translate the boolean logic language to a SQL WHERE clause. The order of the operands will always be in the correct order (with value on the right). Here is a relatively simple example. There could be nested parentheses and the use of NOT operators, etc. (CACOUNT=01 OR CACOUNT=02 OR CA...
I need to store data in memory where I map one or more key strings to an object, as follows: "green", "blue" -> object1 "red", "yellow" -> object2 So, in Java the datastructure might implement: Map<Set<String>, V> I need to be able to efficiently receive a list of objects, where the strings match some boolean criteria, such as: ("...
I have expressions like this: (cat OR cats OR kitten OR kitty) AND (dog OR dogs) NOT (pigeon OR firefly) Anyone having idea how to make tables to save those? Before I got request for usage of brackets, I limited usage of operators to avoid ambiguous situations. So only ANDs and NOTs or only ORs and saved those in this manner: operat...
Hey all, Could anyone point me to a logical diagram of, or show me how to create, a Parrallel In/Serial Out shift register that uses J-K Flip flops? I've found diagrams that use D types, but no J-K's. Any help would be greatly appreciated. Thanks. ...
This is a screenshot of the applet LogiCell 1.0, link to which I found here. As the bottom left corner shows, this is doing sum 0+1 and the result is 01b (bottom right hand side). I am not able to link what is displayed to what the inputs ans outputs are. For example in this case - seeing the snapshot, how do you determine that the i...
Hi all I have a Solr index with a year field, I can query all results within a range of years using the following query which works fine *:* AND year:[1934 TO 1950] How would I incorporate the AND operator so I can search for results in a number of selected years, eg. results for year 1930 AND year 1950 only. I tried something like: ...
Sorry if this is a "Logical Operators 101" kind of question. I've been staring at my screen for 15 minutes trying to wrap my head around it, but I'm stuck. Is there a more concise/elegant way to phrase the following (this is JavaScript syntax, but it's not a language-dependent question): if (!something && !something_else) { // do som...
This works... if ( tileType == "water" or ( otherObj and otherObj:GetType() == "IceBlock" )) then self:SetNoClip( true ) else self:SetNoClip( false ) end - These don't... self:SetNoClip( tileType == "water" or ( otherObj and otherObj:GetType() == "IceBlock" )) //---------------------------------------------------------- l...
I'm trying to attach the Qtip plugin to elements only if the elements containing certain text exists on the page. For some reason I keep getting a script error saying "AddTooltips() is not a function." on a page where the elements do not exist. Something isn't quite working with my if statement. $(document).ready(function() { function...
I need to determine if two different boolean expressions are the same. For example example, S1 = a b, S2 = (a b) b; these two are in fact the same. So I need to detect if they are the same. I am using C#. ...
Is there a function which I could give an array, which would return true if the provided function returned true for all of them? theFunction(array(1,2,3) , 'is_numeric') //true theFunction(array(1,"b",3) , 'is_numeric') //false ...
How should the following boolean expression be written in PHP: $foo = ""; if($var==TRUE){ $foo = "bar"; } or if($var==TRUE){ $foo = "bar"; }else{ $foo = ""; } or $foo = ($var==TRUE) ? "bar": ""; ...
Hi all, Should be a simple question for the C# experts here. I basically want to check if one value or another is TRUE, a wild stab at the code is below: if ((Boolean.Parse(staff.getValue("Male")) | Boolean.Parse(staff.getValue("Female"))) { // is true } Is this correct? Thanks ...
Hey you guys, I am doing a transformation from a customoized set cover problem to a sat, so i can mayhaps use a sat solver for my problem. My problem is, that i have several sets of variables that interact together in a term of the sat problem. something along the lines of x_i v x_j v x_k; y_i v y_j v y_k . However what i cant seem to ge...
-1 == true; //false -1 == false //false -1 ? true : false; //true Can anyone explain the above output? I know I could work round this by comparing to 0 but I'm interested. I'd expect at least one of the sloppy equals statements to be true as they do implicit type conversion, and I certainly didn't expect the ternary to co...
Usually when I want to check if one condition OR another condition is true, I would write code as follows: if (i == 5 || j == 3) { // Do whatever here. } Is there a neat/performant away to avoid the coding style trap of using the OR operator to check for different conditions? ...
// Example bool is true bool t = true; // Convert bool to int int i = t ? 1 : 0; Console.WriteLine(i); // 1 This converts false to 0 and true to 1, can someone explain to me how the t ? 1 : 0 works? ...
I found some exercises where you combine n-bit 2's complement values in different ways and simplify the output where possible. (Their practice exercises use 16-bit, but that's irrelevant). Eg: !(!x&!y) == x|y 0 & y, negate the output == -1 I'm having no problem applying De Morgan's laws with the examples using AND, OR, and NOT but I am...