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Disabling bounds checking for c++ vectors


By : Harvey Shi
Date : October 15 2020, 11:12 AM
like below fixes the issue If you really want to do it (at least for a quick and dirty profiling comparison), this will work if you have no other at()s
code :


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Are vectors more rigorous at checking out of bounds than heap arrays?


By : Mike Bridges
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further A vector will do bounds checking if you use the at() function, for example:
code :
std::vector<int> v(5);
v.at(3) = 10; 
v.at(5) = 20; // throws an exception, std::out_of_range

Disabling Pan Gesture if out of bounds detected


By : Rafael Soares
Date : March 29 2020, 07:55 AM
I wish this help you I have a UIView I am trying to move up and down the screen, however I only wish to enable it to pan so that you cannot drag the view down when it is in its normal position (0, 0)
code :
recognizer.view.center = CGPointMake(recognizer.view.center.x, MAX(recognizer.view.center.y + translation.y, ([[UIScreen mainScreen] bounds].size.height - 20)/2));

Cross checking *multiple* vectors against each other to test whether all elements exist in all vectors


By : Mohanrajnaidu
Date : March 29 2020, 07:55 AM
Hope this helps I have multiple sets (vectors) that must include the same elements. In theory they should, but in reality, I'm being suspicious that some vectors are missing some elements. , You can find all common elements with:
code :
l <- list(vec_a, vec_b, vec_c, vec_d, vec_e, vec_f)
( common <- Reduce(intersect, l) )
#  [1] "Z" "d" "5" "P" "y" "4" "R" "6" "w" "u" "N" "b"
lapply(l, setdiff, common)
# [[1]]
# [1] "A" "T"
# [[2]]
# [1] "B" "T"
# [[3]]
# [1] "A" "T"
# [[4]]
# [1] "A" "x" "W"
# [[5]]
# [1] "A" "T"
# [[6]]
# [1] "A" "T"
outer(seq_along(l), seq_along(l),
      function(a,b) mapply(function(A,B) identical(l[[A]], l[[B]]), a, b))
#       [,1]  [,2]  [,3]  [,4]  [,5]  [,6]
# [1,]  TRUE FALSE  TRUE FALSE  TRUE  TRUE
# [2,] FALSE  TRUE FALSE FALSE FALSE FALSE
# [3,]  TRUE FALSE  TRUE FALSE  TRUE  TRUE
# [4,] FALSE FALSE FALSE  TRUE FALSE FALSE
# [5,]  TRUE FALSE  TRUE FALSE  TRUE  TRUE
# [6,]  TRUE FALSE  TRUE FALSE  TRUE  TRUE

Run Java without Array Bounds checking, Cast checking, etc


By : Srikanth Maggidi
Date : March 29 2020, 07:55 AM
will be helpful for those in need No, this is not possible. The Java Language Specification describes the circumstances under which casts and array accesses throw exceptions, but makes no mention of a mechanism to disable this behaviour.
Throwing of ClassCastException is described in JLS Section 15.6:

Checking if array is out of bounds while checking if item has been visited


By : Liam Walsh
Date : March 29 2020, 07:55 AM
like below fixes the issue You need to check the bounds first. If it's false, it will quit before checking the rest, where it would throw an error, because of the Short-circuit evaluation.
Just switch them.
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