Question

我有一个：

>   romberg := proc(f::algebraic, a, b, N,print_table) 
 local R,h,k,row,col; 
 R := array(0..N,0..N); 

 # Compute column 0, Trapezoid Rule approximations of 
 #                   1,2,4,8,..2^N subintervals 
 h := evalf(b - a); 
 R[0,0] := evalf(h/2 * (f(a)+f(b))); 
 for row from 1 to N do; 
   h := h/2; 
   R[row,0] := evalf(0.5*R[row-1,0] + 
                     sum(h*f(a+(2*k-1)*h),k=1..2^(row-1))); 
   # Compute [row,1]:[row,row], via Richardson extrapolation 
   for col from 1 to row do; 
     R[row,col] := ((4^col)*R[row,col-1] - R[row-1,col-1]) / 
                       (4^col - 1); 
   end do; 
 end do; 

 # Display results if requested 
 if (print_table) then 
       for row from 0 to N do; 
     for col from 0 to row do; 
       printf("%12.10f ",R[row,col]); 
     end do; 
     printf("\n"); 
   end do; 
 end if; 

 return(R[N,N]); 

end proc:
f:=x->1/(1+x^2);
val:=romberg(f,0,1,4,true)

我尝试使用索引滚动到滚动条的任何部分：

<span id="quote-{{quote.id}}" ng-repeat="quote in quotes">{{quote.text}}</span>

然而，quotePosition.top的值总是等于10，这是$scope.jumpToQuote = function (quote) { $scope.quoteSelected = quote; var quotePosition = $ionicPosition.position(angular.element(document.getElementById('quote-'+quote))); $ionicScrollDelegate.$getByHandle('quotes-box').scrollTo(quotePosition.left, quotePosition.top, true); }的顶部偏移量。

Answer 1

据我所知，您需要将document.getElementById('quote-'+quote)替换为document.getElementById('quote-'+quote.id)，您正在连接整个quote对象而不是id。

离子滚动到元素

1 个答案: