I have a picker view controller to select a chemical source and possibly a concentration. If the source doesn't have concentrations, it just presents a single picker. It gets populated by an NSDictionary with source type names as keys and a custom model object I made called Chemical that has four properties, two NSString, one float and...
Given: h_i=t_(i+1)-t_i for i=1,...,n-1 where n is a positive integer. The matrix Q is an n by (n-2) matrix with entries q_(i,j) with i=1,...,n and j=2,...n-1 given by: q_(j-1,j)=1/h_(j-1) q_(j,j)=-(1/h_(j-1)+1/h_j) q_(j+1,j)=1/h_j q_(i,j)=0 for |i-j|>=2 I want to get a matrix Q. How do i write a program for this matrix in R? Many t...
Hi all, I am really new with matlab and would like some helps with matlab.. Here is the problem: Say if i have a 256 by 256 matrix. I would like to replace any values that are 'greater' or 'equal' to 10 with 'one' and name the rest as 'zero' i.e. (values <10).. How can I do it?? For example, 2 3 6 15 24 32 1 7 39 10.... 1 5 7 11 19...
I do have a function which do calculations a lot. $arrleft and $arrright are two different arrays. what I am doing here is I am combining two to produce together output for my current application. what I done is a simple method and it eats lots of space and time. what I want is if any one can make this code to a couple of lines shorter...
Hello everybody, How can I loop over a class attributes in java dynamically. For eg : public class MyClass { private type1 att1; private type2 att2; ... public void function() { for(var in MyClass.Attributes) { System.out.println(var.class); } } } is this possible in Java? ...
or, "Declaring multiple variables in a for loop ist verboten" ?! My original code was for( int i = 1, int i2 = 1; i2 < mid; i++, i2 = i * i ) { I wanted to loop through the first so-many squares, and wanted both the number and its square, and the stop condition depended on the square. This code seems to be the cleanest ...
I have a MySql db with innoDB tables. Very simplified this is how two tables are layed out: Table A: controlID(PK) controlText Table B: controlOptionID(pk) controlID(FK to table A) controlOptionType controlOptionValue So many controlOptions(table B) can reference one control(giving that control m...
Hi, I'm working on optimizing an application . I found that i need to optimize an inner loop for improved performance. rgiFilter is a 16 bit arrary. for (i = 0; i < iLen; i++) { iPredErr = (I32)*rgiResidue; rgiFilter = rgiFilterBuf; rgiPrevVal = rgiPrevValRdBuf + iRecent; rgiUpdate = rgiUpdateRdBuf + iRecent; iPre...
I thought one could initialize several variables in a for loop: for (int i = 0, char* ptr = bam; i < 10; i++) { ... } But I just found out that this is not possible, gcc gives the following error: error: expected unqualified-id before 'char' Is it really true that you can't initialize variables of different types in a for loop? ...
I'm experiencing a weird problem. I have a for loop, inside the loop there is a switch statement. The counter in the for loop is a pointer that points to the beginning of a primitive array, it increments itself till it finds a "terminator number". The array pointed is used to build a view, each elements represent a subview to put in the ...
I have this bit of code which loops through an array and echos out the result to the page thus: while($row = mysqli_fetch_array($result)) { echo '<tr><td><a target="_blank" href="' . $row['url'] . '">' . $row['name'] . '</a></td>' . '<td>' . $row['provider'] . '</td>' . '<td>' . $row['media'] . "</td></tr><br />\n"; } ...
Here is what I mean, suppose I have code like: for (int i = 0; i < 1000; i++) { char* ptr = something; /* ... use ptr here */ } It seems that char* ptr gets allocated every time in the loop, making it ineffective? Is it more effective to write this? char* ptr = something; for (int i = 0; i < 1000; i++) { /* ....
Okay I have 2 files. One file is data that is updated every 10 minutes while the second is data that was previously used. What I am trying to do is take one line from the new file and loop through each line of the second file and see if it matches one. If it does I dont want to use it, but if there is no match than I want to add it to a ...
I assigned values with setattr() function in a loop: for i in range(30): for j in range(6): setattr(self, "e"+str(i)+str(j), Entry(self.top)) , then I want to apply .grid() func. to all these variables with a loop. For example, self.e00.grid(row= 0, column= 0) How can I do that? ...
When I typed that title, I came across many help topics and looked up few of them and got some basic idea. I still am stuck and that is why creating a new post to get some guidance. Scenario is this: My excel sheet has Y or N letter in A1, some text in B1 and a valid future date in C1. I currently have a VBA script that does this for ...
I love the progress bar with rdply() and I want to convert some of my loops (thanks to Hadley!). Is there a way to use a counter in rdply()? I need to accumulate values over replications. The code I want to convert is below. Thanks! reps <- 4 store <- numeric(4) c <- 0 for(i in 1:reps){c <- c + 1; store[i] <- c} store ...
Hi friends. I am leaning towards using std::tr1::shared_ptr to automatically manage a pointer to a utility class in my GUI program. Basically here's a skeleton of the program: int main () { Allocate dynamic memory for utility class GUI code.. GUI code... GUI Code.. GUI Main Loop } The program finishes when the user ca...
Does NVelocity support #for loops? I've looked through the documentation and all I could find was the #foreach loop. I want to loop over a 2 dimensional array. ...
Is while (true) { ... } loop in threads bad? What's the alternative? Update; what I'm trying to to... I have ~10,000 threads, each consuming messages from their private queues. I have one thread that's producing messages one by one and putting them in the correct consumer's queue. Each consumer thread loops indefinitely, checking for a...
Hi, I have a nested loop2(check2) in loop1(check1) but it seems that nested loop2(check2) only runs once. Both loops contain the same array. This script is used to check for a duplicate id in check1. check1=["0", "0", "0", "1", "1", "2", "3", "4", "5", "100", "4294967294", "9", "11", "6", "200", "7", "201", "811", "202", "204", "3000",...