evaluation

I'm about to start a new project which should have a rather large database. The number of tables will not be large (<15), majority of data (99%) will be contained in one big table, which is almost insert/read only (no updates). The estimated amount of data in that one table is going to grow at 500.000 records a day , and we should keep at least 1 year of them to be able to do various reports. There needs to be (read-only) replicated database as a backup/failover, and maybe for offloading reports in peak time. I don't have first hand experience with that large databases, so I'm asking the ones

1.What data structure to use for electric circuit representation for Kirchoff Rules computation purposes how to differentiate between different types of electric components how to 'recognize' wire inter-connections between them 2.how to implement Kirchoff Rules how to obtain current and voltage loops how to store and evaluate Kirchoff equations [original question text] Specifically, how would the program recognize something is in series and parallel and how will it differentiate between a battery, resistor, capacitor, inductors, etc.. Java's an object-oriented language. Start thinking about

Exercise 3.20 in SICP: Draw environment diagrams to illustrate the evaluation of the sequence of expressions (define x (cons 1 2)) (define z (cons x x)) (set-car! (cdr z) 17) (car x) 17 using the procedural implementation of pairs given above. My eyes are destroyed so I cannot draw. I will instead try to imagine as best as I can how the environment model evolves. First, here is the procedural pairs implementation. (define (cons x y) (define (set-x! v) (set! x v)) (define (set-y! v) (set! y v)) (define (dispatch m) (cond ((eq? m 'car) x) ((eq? m 'cdr) y) ((eq? m 'set-car!) set-x!) ((eq? m 'set

If I define a module as such: module Module1 open System let foo = Console.WriteLine("bar") Then, in interactive do #load "Library1.fs" //where the module is defined open Module1 I see a [Loading c:\users\jj\documents\visual studio 2015\Projects\Library1\Library1\Library1.fs] bar Indicating that the foo function ran without me even calling it! How/why does this happen? Is there any way to prevent it? I'm aware that the return value of foo is whatever (Console.Writeline("bar")) evaluates to, and that there isn't any reason that can't be evaluated "immediately?" (when the module is loaded I

I've got a stored procedure that allows an IN parameter specify what database to use. I then use a pre-decided table in that database for a query. The problem I'm having is concatenating the table name to that database name within my queries. If T-SQL had an evaluate function I could do something like eval(@dbname + 'MyTable') Currently I'm stuck creating a string and then using exec() to run that string as a query. This is messy and I would rather not have to create a string. Is there a way I can evaluate a variable or string so I can do something like the following? SELECT * FROM eval(

Which of the following expressions will always precede left to right in all browsers(particularly IE6+, F3+, Opera 9+, Chrome)? For example the window should always alert first function then second function . In C they always suggest not to depend on the order of the evaluation of expressions. Is the same true for JavaScript or is Operator Precedence consistent? function first(){ alert('first function'); return 0; } function second(){ alert('second function'); return 23; } first() + second(); first() - second(); first() * second(); first() / second(); first() < second(); first() > second();

If I get a bool variable and set its second bit to 1, then variable evaluates to true and false at the same time. Compile the following code with gcc6.3 with -g option, ( gcc-v6.3.0/Linux/RHEL6.0-2016-x86_64/bin/g++ -g main.cpp -o mytest_d ) and run the executable. You get the following. How can T be equal to true and false at the same time? value bits ----- ---- T: 1 0001 after bit change T: 3 0011 T is true T is false This can happen when you call a function in a different language (say fortran) where true and false definition is different than C++. For fortran if any bits are not 0 then the

Unboxed types, like Int# , and strict functions, like f (!x) = ... , are something different, but I see conceptual similarity - they disallow thunks/laziness in some way. If Haskell was a strict language like Ocaml, every function would be strict and every type unboxed. What is the relationship between unboxed types and enforcing strictness? Don Stewart Unboxed vs Boxed Data To support parametric polymorphism and laziness , by default Haskell data types are represented uniformly as a pointer to a closure on the heap , with a structure like this: (source: haskell.org ) These are "boxed" values.

I've just read that order of evaluation and precedence of operators are different but related concepts in C++. But I'm still unclear how those are different but related?. int x = c + a * b; // 31 int y = (c + a) * b; // 36 What does the above statements has to with order of evaluation. e.g. when I say (c + a) am I changing the order of evaluation of expression by changing its precedence? The important part about order of evaluation is whether any of the components have side effects. Suppose you have this: int i = c() + a() * b(); Where a and b have side effects: int global = 1; int a() {