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Why does this method print 4?
...
When we first get into main, the space left over is X-M. Each recursive call takes up R more memory. So for 1 recursive call (1 more than original), the memory use is M + R. Suppose that StackOverflowError is thrown after C successful recursive calls, that is, M + C * R <= X and M + C * (R + 1...
Difference between const & const volatile
...ode related the variable, usually when we know it can be changed from "outside", e.g. by another thread.
const will tell the compiler that it is forbidden for the program to modify the variable's value.
const volatile is a very special thing you'll probably see used exactly 0 times in your life (tm)...
Nested fragments disappear during transition animation
...
In order to avoid the user seeing the nested fragments disappearing when the parent fragment is removed/replaced in a transaction you could "simulate" those fragments still being present by providing an image of them, as they appeared on th...
How to call a Parent Class's method from Child Class in Python?
...OP was asking how to do it without explicitly naming the superclass at the call site (Bar, in this case).
– Adam Rosenfield
Apr 30 '09 at 2:13
8
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Python unit test with base and sub class
...ttest
class CommonTests(object):
def testCommon(self):
print 'Calling BaseTest:testCommon'
value = 5
self.assertEquals(value, 5)
class SubTest1(unittest.TestCase, CommonTests):
def testSub1(self):
print 'Calling SubTest1:testSub1'
sub = 3
se...
How to print pandas DataFrame without index
...ipboard() and then paste into Excel. Useful for dealing with Windows's stupid "you can't edit an open document" BS.
– BallpointBen
Jan 18 '19 at 23:42
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A fast method to round a double to a 32-bit int explained
...representable by a 32-bit int, so less (in absolute value) than (-2^31+1); call it -a. Such a number is obviously made positive by adding the magic number, and the resulting value is 252+251+(-a).
Now, what do we get if we interpret the mantissa in 2's complement representation? It must be the resu...
#if DEBUG vs. Conditional(“DEBUG”)
...L on release.
[Conditional("DEBUG")]: This code will reach the IL, however calls to the method will be omitted unless DEBUG is set when the caller is compiled.
Personally I use both depending on the situation:
Conditional("DEBUG") Example: I use this so that I don't have to go back and edit my co...
Saving timestamp in mysql table using php
...he FROM_UNIXTIME() function for this.
Like this:
INSERT INTO table_name
(id,d_id,l_id,connection,s_time,upload_items_count,download_items_count,t_time,status)
VALUES
(1,5,9,'2',FROM_UNIXTIME(1299762201428),5,10,20,'1'),
(2,5,9,'2',FROM_UNIXTIME(1299762201428),5,10,20,'1')
...
What is a StackOverflowError?
...a variable in the stack references that object on the heap). The stack typically lives at the upper end of your address space and as it is used up it heads towards the bottom of the address space (i.e. towards zero).
Your process also has a heap, which lives at the bottom end of your process. As yo...