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How to show a dialog to confirm that the user wishes to exit an Android Activity?
...your app: pressing home, selecting a notification, receiving a phone call, etc.
– hackbod
Feb 13 '10 at 19:56
This wor...
Fastest way to find second (third…) highest/lowest value in vector or column
...ightly more general function, which can be used to find the 2nd, 3rd, 4th (etc.) max:
maxN <- function(x, N=2){
len <- length(x)
if(N>len){
warning('N greater than length(x). Setting N=length(x)')
N <- length(x)
}
sort(x,partial=len-N+1)[len-N+1]
}
maxN(1:10)
...
Create an empty object in JavaScript with {} or new Object()?
... parameter- the object creation to other constructors like string, number, etc... It's highly important to keep this in mind when you're managing dynamic data to create objects..
Many authors recommend not to use the object constructor when you can use a certain literal notation instead, where you ...
Does MySQL index foreign key columns automatically?
... Index. So, may be that is the reason MS SQL, DB2 (Oracle I'm not sure on) etc leave it up to the DBA; after all multiple indexes on large tables can cause issues with performance and space.
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Integer division with remainder in JavaScript?
...t desired: 3.5 % 2 evaluates to 1.5. Make sure to handle (parseInt, floor, etc.) as required
– user166390
Nov 19 '10 at 19:09
...
Force DOM redraw/refresh on Chrome/Mac
...
But it left some 'remains' like 'display: block' etc that sometimes can destroy page structure.
– pie6k
Jul 21 '14 at 9:14
...
Change URL parameters
...er you wish e.g
using document.location = newUrl or change an anchor link etc
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jQuery find events handlers registered with an object
...handlers for the event type that we are interested in (e.g. click, change, etc)
handler
Actual event handler method that you can see by right clicking it and selecting Show function definition
selector
The selector provided for delegated events. It will be empty for direct events.
targets
List wit...
Why do we usually use || over |? What is the difference?
...plicit != 0 comparison (pointers, floats, objects with an operator bool(), etc.) and bitwise operators are almost always nonsensical in those contexts.
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How can I use Async with ForEach?
...ion? Should it fail on the first failure or wait until all have completed? Etc.
– Stephen Cleary
Oct 17 '19 at 18:01
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