variable-assignment

Is there a better way to do this? a, b, c, = "yyy", "yyy", "yyy" Obvious attempts fails a, b, c, = "yyy" a, b, c = "yyy"*3 Technically, the following works, but I don't think it's intuitive as this logic says a, b, and c are the same, whereas all I'm trying to do is say they initialize as the same value a=b=c="yyy" No need to use tuple assignment here; the right-hand value is immutable, so you can just as well share the reference: a = b = c = 'yyy' This is not unintuitive at all, in my view, and the python compiler will only need to store one constant with the bytecode, while using tuple

I wrote a quick CI library class to render my pages so I wouldn't have to keep typing '$this->load->view' all the time and for DRY. Now when I re-render my contact form after passing in invalid data the error messages aren't showing up. The library class: class Page extends CI_Controller { public function render($page, $data) { // $page should be path to page view $this->load->view('fragments/header', $data); $this->load->view('fragments/navigation'); $this->load->view($page); $this->load->view('fragments/navigation'); $this->load->view('fragments/footer'); } } and the controller: class

I have a 2D array A of shape (4,3) , and a 1D array a of shape (4,) . I want to swap the first two rows of A , as well as the first two elements in a . I did the following: A[0,:],A[1,:] = A[1,:],A[0,:] a[0],a[1] = a[1],a[0] Apparently, it works for a , but fails for A . Now, the second row becomes the first row, but the first row remains unchanged. If I do the following: first_row_copy = A[0,:].copy() A[0,:] = A[1,:] A[1,:] = first_row_copy Then, it seems to work. Why the first method doesn't work? (but works for a ) Also, what's the difference between A_copy = A[0,:].copy() and A_copy = A[0,

When stepping through a sqlite3_stmt , I'd like to check against a return value of NULL rather than store it and check against the stored value. Here's what I'm doing now: char *email = (char *)sqlite3_column_text(statement, 10); if (email == NULL) email = ""; And here is what I'd like to be doing, minus the double-call to column : char *email = ((char *)sqlite3_column_text(statement, 10)) ? (char *)sqlite3_column_text(statement, 10) : ""; Is there some way to express the second expression more concisely? I have to do a lot of these repetitively, so I'm looking for brevity. I know this is a

public void crearCliente() { int i, k, j, l; registro r = new registro(); k = lr.getSize(); for (i = 0; i < k; i++) { r = lr.get(i); l = r.getSize(); String contenido[] = new String[8]; for (j = 0; j < l; j++) { contenido[j] = r.getCampoR(j); //System.out.println(contenido[j]); } c1 = new Cliente(contenido[0], contenido[1], contenido[2], contenido[3], contenido[4], contenido[5], contenido[6], contenido[7]); c1.verCliente();} In this code, at the end,I assign a value to c1, but when I print it i get null in all the c1 fields. I write my code down for the class Cliente. I want to print all the

There is an error. Is it wrong to assign a value to a[i] in the following code? Or something is wrong with conditional operators? #include<stdio.h> #include<string.h> int main(){ char a[12]="sumit tyagi"; int i=0; while(a[i]!='\0'){ a[i]>90 ? a[i]=a[i]-32 : a[i]=a[i]+32; //error in this line i++; } printf("\n %s",a); a[i]>90 ? a[i]=a[i]-32 : a[i]=a[i]+32; is not evaluated as a[i]>90 ? (a[i]=a[i]-32) : (a[i]=a[i]+32); since = has lower precedence than ?: . In standard C you can't write it as above although some compilers allow it as an extension. You could write it as the more readable (and

I have strings in a namelist , that correspond to variables as well as field names in the application. The function should read strings from namelist, add an 'f' to get field_names, and then put variable values in corresponding fields. I tried following code, that does not give any error, but also does not work: namelist: ["var1" "var2"] var1: 5 var2: 10 process: [ repeat i length? namelist [ (to-set-path compose rejoin [namelist/:i "f/text"] (to-word namelist/:i)) ] ] lay: layout [ text "Values to appear here: " var1f: field "a" var2f: field "b" button "Click" [do process] ] view lay As a

I was doing a simple calculator with the following code. Right now it executes perfectly. When I tried to change things around, however, it doesn't work. I used BOOL program to check whether to continue asking for input from the person or finish the program. If I change the expression of while statement to just (program) and change YES / NO in the program statements, why does the code fail to do what is inside the while ? // A simple printing calculator { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init] Calculator *deskCalc = [[Calculator alloc] init]; double value1; char operator