大约有 3,000 项符合查询结果（耗时：0.0127秒） [XML]
Android - How To Override the “Back” button so it doesn't Finish() my Activity?
...eral, though, I agree: avoid overriding.
– Matt Briançon
May 9 '11 at 7:17
4
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Printf width specifier to maintain precision of floating-point value
... in:
#include <float.h>
int Digs = DECIMAL_DIG;
double OneSeventh = 1.0/7.0;
printf("%.*e\n", Digs, OneSeventh);
// 1.428571428571428492127e-01
But let's dig deeper ...
Mathematically, the answer is "0.142857 142857 142857 ...", but we are using finite precision floating point numbers.
L...
month name to month number and vice versa in python
...t;. The original version of David's code produced syntax errors in 2.6 and 3.1 -- both need () around v,k and both need enumerate for calendar.month_abbr, which I fixed.
– Wayne Werner
Aug 5 '10 at 19:09
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Histogram using gnuplot?
...n(x,width)=width*floor(x/width)
plot 'datafile' using (bin($1,binwidth)):(1.0) smooth freq with boxes
check out help smooth freq to see why the above makes a histogram
to deal with ranges just set the xrange variable.
sha...
What is the fastest way to get the value of π?
... loop_ a_n b_n t_n p_n (i - 1)
in
let a,b,t,p = loop_ (1.0) (1.0 /. (sqrt 2.0)) (1.0/.4.0) (1.0) iters in
(a +. b) *. (a +. b) /. (4.0 *. t)
Lastly, how about some pi golf (800 digits)? 160 characters!
int a=10000,b,c=2800,d,e,f[2801],g;main(){for(;b-c;)f[b++]=a/5;for(;d=0...
Freeze the top row for an html table only (Fixed Table Header Scrolling) [duplicate]
... sticky; /* and other browsers */
– Jørgen Rudolph Låker
Mar 17 at 12:21
1
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Determine on iPhone if user has enabled push notifications
...ted May 4 '19 at 13:51
Jean-François Fabre♦
122k1111 gold badges9797 silver badges156156 bronze badges
answered Mar 27 '12 at 22:28
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Calculating arithmetic mean (one type of average) in Python
...mean([1,2,4])) # 2.3333333333333335
It's available since Python 3.4. For 3.1-3.3 users, an old version of the module is available on PyPI under the name stats. Just change statistics to stats.
share
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Android - Back button in the title bar
In many apps (Calendar, Drive, Play Store) when you tap a button and enter a new activity, the icon in the title bar turns into a back button, but for the app I am making, it doesn't do that. How do I make that icon take you back to the previous screen?
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How to link to apps on the app store
...2 for the set)
Replace accented and other "decorated" characters (ü, å, etc.) with their elemental character (u, a, etc.)
Leave all other characters as-is.
Listing 2 Punctuation characters that must be removed.
!¡"#$%'()*+,-./:;<=>¿?@[]^_`{|}~
Below are some examp...