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Array slicing in Ruby: explanation for illogical behaviour (taken from Rubykoans.com)
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Read the slice syntax array[x,y] as "starting after x elements in array, select up to y elements". This is only meaningful if array has at least x elements.
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How do I make a fully statically linked .exe with Visual Studio Express 2005?
...e configurations, you should make them to "All Configurations" --- you can select this at the top of the Properties window. If you make the change to just the Debug configuration, it won't apply to the Release configuration, and vice-versa.
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How to join (merge) data frames (inner, outer, left, right)
...s these operations in SQL.
library(sqldf)
## inner join
df3 <- sqldf("SELECT CustomerId, Product, State
FROM df1
JOIN df2 USING(CustomerID)")
## left join (substitute 'right' for right join)
df4 <- sqldf("SELECT CustomerId, Product, State
FROM df1...
Visual Studio 2010 annoyingly opens documents in wrong MDI pane
...ion. Then when re-docking it doesn't seem to matter which of the above you select (windows moves back to place) but if you took the crossed-out one - the code windows start opening in the "wrong" location. Took me quite a while before I made that connection :)
– kalmiya
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Why invoke Thread.currentThread.interrupt() in a catch InterruptException block?
...eceive a
ClosedByInterruptException.
If this thread is blocked in a Selector then the thread's interrupt
status will be set and it will return immediately from the selection
operation.
If none of the previous conditions hold then this thread's interrupt
status will be set.
So, if...
How do I change the color of the text in a UIPickerView under iOS 7?
...IColor whiteColor]}];
return attString;
}
If you want to change the selection bar colors as well, I found that I had to add 2 separate UIViews to the view containing the UIPickerView, spaced 35 pts apart for a picker height of 180.
Swift 3:
func pickerView(_ pickerView: UIPickerView, attrib...
String.IsNullOrWhiteSpace in LINQ Expression
...<string>(); var i = from m in my where !string.IsNullOrWhiteSpace(m) select m;
– Eric J.
Mar 7 '12 at 18:24
38
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Differences between action and actionListener
...not really useful on command components. They are more useful on input and select components <h:inputXxx>/<h:selectXxx>. In command components, just stick to action and/or actionListener for clarity and better self-documenting code. Moreover, like actionListener, the f:ajax listener does...
Unique (non-repeating) random numbers in O(1)?
... max
At each iteration, a random number r is selected between 0 and max, array[r] and array[max] are swapped, the new array[max] is returned, and max is decremented:
max = 10, r = 3
+--------------------+
v v
+--+--+--+--+--+--+...
sort object properties and JSON.stringify
...ally and iterate through that array (which will be in the right order) and select each value from the object in that order. "hasOwnProperty" is checked also so you definitely have only the object's own properties. Here's an example:
var obj = {"a":1,"b":2,"c":3};
function iterateObjectAlphabetical...