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How to create a MySQL hierarchical recursive query
...t to select all the descendants of.
This will work also if a parent has multiple children. However, it is required that each record fulfills the condition parent_id < id, otherwise the results will not be complete.
Variable assignments inside a query
This query uses specific MySQL syntax: vari...
Display date/time in user's locale format and time offset
... will not work if you want the date to look the same across browsers. Any alternatives known?
– Josh Mc
Feb 12 '14 at 4:13
6
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How do I pass a method as a parameter in Python
...1(self):
return 'hello world'
def method2(self, methodToRun):
result = methodToRun()
return result
obj.method2(obj.method1)
Note: I believe a __call__() method does exist, i.e. you could technically do methodToRun.__call__(), but you probably should never do so explicitly. __call__() ...
How can I get the current screen orientation?
...
@HRJ you can use getWindowManager().getDefaultDisplay().getRotation()
– MKJParekh
Dec 9 '11 at 12:10
24
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Time complexity of Sieve of Eratosthenes algorithm
...rrent position + P; you actually start crossing off numbers at P^2. All multiples of P less than P^2 will have been crossed off by previous prime numbers.
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How to find out which package version is loaded in R?
...ion of a package is loaded
> packageVersion("snow")
[1] ‘0.3.9’
Although it sounds like you want to see what version of R you are running, in which case @Justin's sessionInfo suggestion is the way to go
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Android View.getDrawingCache returns null, only null
.....................private void takeScreenShot() { for (int i = 1; i < 4; i++) { //startDialog(); View view = ScreenShotActivity.this.findViewById(R.id.relativelayout); Bitmap bitmap = loadBitmapFromView(view);}}
– akash yadav
Sep 11 '14 ...
Why is lazy evaluation useful?
...s the use of quickSort:
quickSort [] = []
quickSort (x:xs) = quickSort (filter (< x) xs) ++ [x] ++ quickSort (filter (>= x) xs)
If we now want to find the minimum of the list, we can define
minimum ls = head (quickSort ls)
Which first sorts the list and then takes the first element of th...
Using the “final” modifier whenever applicable in Java [closed]
...ng on your code) will misinterpret or misuse the thought process which resulted in your code. At least it should ring some bells when they now want to change your previously immutable thing.
At first, it kind of looks awkward to see a lot of final keywords in your code, but pretty soon you'll stop ...
How do I merge a specific commit from one branch into another in Git?
...
The git cherry-pick <commit> command allows you to take a single commit (from whatever branch) and, essentially, rebase it in your working branch.
Chapter 5 of the Pro Git book explains it better than I can, complete with diagrams and such...