You could do it with a Timer, but you would need to have some form of locking on your database scan and update. A simple lock to synchronize may be enough to prevent multiple runs from occurring. That being said, it might be better to start a timer AFTER your operation is complete, and just … Read more
Just use negative margins, in the second div say: <div style=”margin-top: -25px;”> And make sure to set the z-index property to get the layering you want.
This is a query pattern for which I found the answer many years ago: SELECT * FROM mytable a JOIN mytable b on a.starttime <= b.endtime and a.endtime >= b.starttime and a.name != b.name; — ideally, this would compare a “key” column, eg id To find “any overlap”, you compare the opposite ends of the … Read more
You can try this: library(dplyr) ranges %>% arrange(start) %>% group_by(g = cumsum(cummax(lag(stop, default = first(stop))) < start)) %>% summarise(start = first(start), stop = max(stop)) # A tibble: 2 × 3 # g start stop # <int> <dbl> <dbl> #1 0 65.72000 87.75625 #2 1 89.61625 104.94062
The currently accepted answer does not answer the question. And it is wrong in principle. a BETWEEN x AND y translates to: a >= x AND a <= y Including the upper bound, while people typically need to exclude it: a >= x AND a < y With dates you can easily adjust. For the … Read more
In 2010, @RomainGuy (core Android engineer) stated that negative margins had unspecified behavior. In 2011, @RomainGuy stated that you can use negative margins on LinearLayout and RelativeLayout. In 2016, @RomainGuy stated that they have never been officially supported and won’t be supported by ConstraintLayout. It is easy to work around this limitation though. Add a … Read more
Update 2016: To get nn, nn, nn, SDJMcHattie proposes in the comments (?=(nn)) (see regex101). (?=(nn)) Original answer (2008) A possible solution could be to use a positive look behind: (?<=n)n It would give you the end position of: nnnn nnnn nnnn As mentioned by Timothy Khouri, a positive lookahead is more intuitive … Read more
WARNING: Reading the following information can affect your mental health. The painting order for the descendants of an element generating a stacking context (see the z-index property) is: If the element is a root element: background color of element over the entire canvas. background image of element, over the entire canvas, anchored at the origin … Read more
if (RectA.Left < RectB.Right && RectA.Right > RectB.Left && RectA.Top > RectB.Bottom && RectA.Bottom < RectB.Top ) or, using Cartesian coordinates (With X1 being left coord, X2 being right coord, increasing from left to right and Y1 being Top coord, and Y2 being Bottom coord, increasing from bottom to top — if this is not … Read more