logic

问题 I am reading about mechanization of linear logic in Coq http://www.cs.cmu.edu/~iliano/projects/metaCLF2/inc/dl/papers/lsfa17.pdf and https://github.com/brunofx86/LL and I have trouble to understand the type constructors of the inductive type term from https://github.com/brunofx86/LL/blob/master/FOLL/LL/SyntaxLL.v: Inductive term := |var (t: T) (* variables *) |cte (e:A) (* constants from the domain DT.A *) |fc1 (n:nat) (t: term) (* family of functions of 1 argument *) |fc2 (n:nat) (t1 t2:

问题 I know you can use INDEX/MATCH to do this, but is there a logical or specific reason why VLOOKUP cannot do this? Maybe only Microsoft knows, but it seems simple enough that if it could have been done, it would have. EDIT: to clarify, note the following formulas for the difference I am explaining. =VLOOKUP(A1,A:C,3,false) - valid =VLOOKUP(C1,C:A,3,false) - not valid 回答1: Actually it is possible to do a right to left vlookup but you need to redifne your array. like this: (A) (B) (C) 0,457 3,55

问题 Is there a way to quickly check the following logic? I'm using C#. if(a) { } if(b) { } if(c) { } else none of the above //...? execute if all above conditions are false { } This differs from using if-else in that a, b, and c can all be true at once. So I can't stack them that way. I want to check else for a, b, and c are all false without writing if(!a && !b && !c) . This is because the code can get quite messy when the if conditions become more complex. It requires rewriting a lot of code.

问题 I'm trying to find the appropriate words to use to describe the issue that I am having, hopefully this will explain the problem. I have two Update() methods in two different classes, and some of the functionality in one is reliant on data from another. Code A is reliant on Code B's data, using Debug.Log() I found that Code B's Update() is being executed after Code A's Update() . My question is, Is there a out of box method to controller the Call stack of the Update method? If there is how is

问题 New to Verilog and trying to figure out the basics of assiging wires based on combination logic. I have: wire val; wire x; wire a; wire b; always @* begin if(val == 00) I want to assign x = a if(val == 01) I want to assign x = b end where a and b are wires with values - and x is a wire going into a register. If you can please point me in the right direction to what I need to change, it would be much appreciated. Thank You. 回答1: First thing to ask is: are you trying to use those wires as

问题 Is any one who can help me to create PHP or mysql Code for our Office employee salary tax table. Here is the base for our tax regulation. If salary is >= 0 and <= 150 it will be 0% (Nill), If salary is >= 151 and <= 650 it will be 10% - 15.00, If salary is >= 651 and <= 1400 it will be 15% - 47.50, If salary is >= 1401 and <= 2350 it will be 20% -117.50, If salary is >= 2351 and <= 3550 it will be 25% - 235.00, If salary is >= 3551 and <= 5000 it will be 30% - 412.5, If salary is >= 5001 it

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 8 years ago . As you know this alarm bug, "We're aware of an issue related to nonrepeating alarms set for January 1 or 2. Customers can set recurring alarms for those dates and all alarms will work properly beginning January 3." Read more: http://news.cnet.com/8301-13579_3-20026911-37.html#ixzz19temSRs9 I just wonder why it

问题 I tried to shorten my code, from : if(i== x || i == y || i == z ) to if (i == ( x || y || z )) I know this way is wrong because I got incorrect i in log. However, is there any method to shorten the code in objective-C ? 回答1: if there is a higher probability that x==i than y==i then it's better to write it as x==i || y==i as opposed to y==i || x==i because if the first statement evaluates to true, the second one is not evaluated (it's shortcircuited) 回答2: You could use a switch statement, but

问题 I am stuck on Kripke semantics, and wonder if there is educational software through which I can test equivalence of statements etc, since Im starting to think its easier to learn by example (even if on abstract variables). I will use ☐A to write necessarily A ♢A for possibly A do ☐true, ☐false, ♢true, ♢false evaluate to values, if so what values or kinds of values from what set ({true, false} or perhaps {necessary,possibly})? [1] I think I read all Kripke models use the duality axiom : (☐A)->

问题 Is it possible to pull two variables into a Foreach loop? The following is coded for the PowerShell ASP. The syntax is incorrect on my Foreach loop, but you should be able to decipher the logic I'm attempting to make. $list = Get-QADUser $userid -includeAllProperties | Select-Object -expandproperty name $userList = Get-QADUser $userid -includeAllProperties | Select-Object -expandproperty LogonName if ($list.Count -ge 2) { Write-host "Please select the appropriate user.<br>" Foreach ($a in