logic

Wherefore? The usecase context in which my problem occures I define 3 random item of a triangle. Microsoft Z3 should output: Are the constraints satisfiabe or are there invalid input values? A model for all the other triangle items where all the variables are assigned to concrete values. In order to constrain the items i need to assert triangle equalities - i wanted to start out with the Pythagorean Theorem ( (h_c² + p² = b²) ^ (h_c² + q² = a²) ). The Problem I know that Microsoft Z3 has only limited capabilities to solve non-linear arithematic problems. But even some hand calculators are able

What would be the best logic to check all the letters in a given string. If all the 26 letters are available in the provided string, I want to check that and perform so ops. eg. Pack my box with five dozen liquor jugs. Would using a Hash be useful? Or using a bit map? or any other way? BTW my code would be in Java. Not yet fully optimized: public static void main(String... a) { String s = "Pack my box with five dozen liquor jugs."; int i=0; for(char c : s.toCharArray()) { int x = Character.toUpperCase(c); if (x >= 'A' && x <= 'Z') { i |= 1 << (x - 'A'); } } if (i == (i | ((1 << (1 + 'Z' - 'A')

I was asked to perform this operation of ternary operator use: $test='one'; echo $test == 'one' ? 'one' : $test == 'two' ? 'two' : 'three'; Which prints two (checked using php). I am still not sure about the logic for this. Please, can anybody tell me the logic for this. Nicholas Wilson Well, the ? and : have equal precedence, so PHP will parse left to right evaluating each bit in turn: echo ($test == 'one' ? 'one' : $test == 'two') ? 'two' : 'three'; First $test == 'one' returns true, so the first parens have value 'one'. Now the second ternary is evaluated like this: 'one' /*returned by

If you have an if-statement in C# that checks multiple conditions: if (a == 5 && b == 9) { ... } Does b == 9 still get checked if a == 5 condition is false, or does it automatically exit since there's no way this could pass anymore? Similarly, for an OR if-statement: if (a == 5 || b == 9) { ... } Will b == 9 still get checked if a == 5 is true? Both && and || is "short-circuiting" operators, which means that if the answer is known from the left operand, the right operand is not evaluated. This means that: a && b b will not be evaluated if a is false, since the final answer is already known.

I am working with a TABLE, need logical help. Check the below URL for the table structure and sample data. http://sqlfiddle.com/#!2/ece06/2 Table Schema: CREATE TABLE test ( ID INTEGER, NAME VARCHAR (50), VALUE INTEGER ); Inserted Data: INSERT INTO test VALUES (1, 'A', 4); INSERT INTO test VALUES (1, 'B', 5); INSERT INTO test VALUES (1, 'C', 8); INSERT INTO test VALUES (2, 'D', 9); INSERT INTO test VALUES (2, 'E', 9); INSERT INTO test VALUES (3, 'F', 9); INSERT INTO test VALUES (3, 'G', 9); INSERT INTO test VALUES (3, 'H', 9); INSERT INTO test VALUES (3, 'I', 9); Query: SELECT ID, GROUP_CONCAT

Are there any technical/logical differences between the comparison "!= true" and "== false" in programming languages, and if there are, which comparison should be chosen on what occasion? Logically there can be differences depending on the type of value that you are comparing and language you are using. For example: x == false implies x != true , but x != true does not always imply x == false because x can also be some nonsense value. 1 + 1 = 3 is both == false and != true . 7 > cat is neither == false and != true since it is nonsense. x = null is != true but is not == false . 来源： https:/

I'm trying to write an algorithm to select all combinations of n values from a set of numbers. For instance, given the set: 1, 2, 3, 7, 8, 9 All combinations of 2 values from the set is: (1, 2), (1, 3), (1, 7), (1, 8), (1, 9), (2, 3), (2, 7), (2, 8), (2, 9), (3, 7), (3, 8), (3, 9), (7, 8), (7, 9), (8, 9) And 3 is: (1, 2, 3), (1, 2, 7), (1, 2, 8), (1, 2, 9), (1, 3, 7), (1, 3, 8), (1, 3, 9), (1, 7, 8), (1, 7, 9), (1, 8, 9), (2, 3, 7), (2, 3, 8), (2, 3, 9), (2, 7, 8), (2, 7, 9), (2, 8, 9), (3, 7, 8), (3, 7, 9), (3, 8, 9), (7, 8, 9) etc! I'm currently using methods to to yield return sets of

My ASP.NET page has following query string parameter: …?IDs=1000000012,1000000021,1000000013,1000000022&... Here IDs parameter will always have numbers separated by something, in this case , . Currently there are 4 numbers but normally they would be in between 3 and 7 . Now, I am looking for method to convert each big number from above into smallest possible value; specifically compressing value of IDs query string parameter. Both, compressing each number algorithm or compressing whole value of IDs query string parameter are welcome. Encode or decode is not an issue; just compressing the value