logic

问题 I'm relatively new to Javascript and programming in general. Today while writing a simple triple dice roll simulator I struck a problem that I worked around but which I still don't understand. Here's my code... // ROLLING TRIPLES var diceSides = 6; var diceOne = Math.floor(Math.random() * diceSides + 1); var diceTwo = Math.floor(Math.random() * diceSides + 1); var diceThree = Math.floor(Math.random() * diceSides + 1); var rolls = 3; while ((diceOne !== diceTwo) || (diceTwo !== diceThree)) {

问题 I've created an auto-populating array in a counted loop for each month using timestamps, e.g 2016-06-11 00:00:00 - the database layout that the loop is fetching from is: TimeRecord | Views 2016-06-11 00:00:00 | 22 2016-08-11 00:00:00 | 44 Now, the above example skips the 07 (July) month, there is NO DATA for this month, and so when the loop goes through this month, it should return either null or 0, but it returns the previously known number (which is 22 in this case). For 2016-09, there is

问题 I'm developing an application using Struts 1.3.10 I need to iterate 2 lists in order to print the result in jsp. The first list iteration needs to be used to select elements from list 2. For that reason I'm trying to do like this: <logic:iterate name="bodyForm" property="domainList" id="domList"> <div><h1><bean:write name="domList" property="domain"/><h1> <ul> <logic:iterate name="bodyForm" property="locationsList" id="locList" > <logic:equal name="locList" property="domain" value="<bean

问题 I'm trying to finish up my homework and this is the last thing I couldn't figure it out since this afternoon. Say for example I have string in the array like this ABCD24EFG and I want to get that number 24 in a variable that I initialize which type is int I can do it with one single number and convert it like this number_holder = array_name[4] - '0'; and I will get 2 in the number_holder but how can I get the whole like 24 and convert them into int type? 回答1: You can use this logic. number

问题 I'm using the following logic to solve the subset sum problem as described in this question: Total sum from a set (logic). It is working and it will give me one random solution every time, the problem is that I need only the solutions with an specific amount of items. For example: [2,3,4,6,3] //Set of values SUM = 6 The current solutions I can get are: [4,2] [6] [3,3] But what if I need this method to randomly return only a solution with (for example) 2 items? 回答1: Just in case somebody needs

问题 sound_dirs={Ball, Daddy,Jeep, No, Tea_Pot}; The 5 variables in sound_dirs are path-char-vectors to 5 different sound folders. data_structure is a cell of (length(num_sounds) row x 3 column cell each row corresponds to a different sound first column = directory name second column = files struct for .wav files third column = formant data I want to be able to index into the files struct and do some processing on each .wav file of the same type, and then generate statistics on the group. I use

问题 I have to select all the records where FIELD1 is value11 or value12 and FIELD2 is value21, value22, value23, ... or value29. All 2*9=18 pairs of admissible values for FIELD1 and FIELD2 are possible. Which is the most compact form to write down my SQL query? 回答1: where field1 in (value11, value12) and field2 in (value21, value22, value23, ..., value29) (Where you need to replace the dots with all value24 and so on.) 来源： https://stackoverflow.com/questions/3936253/and-or-conditions-in-a-sql

问题 I've had this idea for a while, and I'm curious if it's possible to implement in a worthwhile way. I want to take an array of boolean-returning lambda expressions and perform logical operations on their results. Here's a pointless example of a valid list: var tests = new List<Func<int, bool>>() { (x) => x > 10, (x) => x < 100, (x) => x != 42 }; What I'd like to do is essentially bool result = tests.And(); or perform other logical operations. I realize I could write an IEnumerable-implementing

问题 I have a circuit made from AND NOT and OR gates, i need to convert it so that it only has NOR gates, this isn't working to well for me so any tips would be much appreciated. This is the original function to convert: ~a~b~cd + ~a~bc~d + ~ab~c~d + ~abcd + a~b~c~d + a~bcd + ab~cd + abc~d 回答1: I'm assuming cd means c AND d. The rules are: ~a = a NOR a a^b = (a NOR a) NOR (b NOR b) a+b = (a NOR b) NOR (a NOR b) From that, it's purely mechanical. I'll do the first part as an example: ~a~b~cd + ~a

问题 I have the table in MySQL, containing group_name and username , like this: ID|group_name|username ---------------------- 1 | A | user1 ---------------------- 2 | B | user2 ---------------------- 3 | C | user1 ... And I have some logical expression that looks like this: (A & B) || C Which means, that if I'm searching by some user, this user should be in both groups A and B, or in C. I have to check users with custom expressions in Laravel, and my query will look like this: return DB::table(