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Is there a Null OutputStream in Java?
... I think Java 11 has only been out for one week.
– Brandon Yarbrough
Oct 5 '18 at 21:04
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Constructor overloading in Java - best practice
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While there are no "official guidelines" I follow the principle of KISS and DRY. Make the overloaded constructors as simple as possible, and the simplest way is that they only call this(...). That way you only need to check and handle the parameters once and only once.
public class Simple {
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Do Java arrays have a maximum size?
...es makes no sense unless we are willing to downvote answers that are plain and simply wrong. Does the difference of five bytes actually matter in the real world, NO, of course not. But it concerns me that people are willing to give an answer "authoritatively" without even trying it to see if it rea...
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AI人工智能相关高阶教程，原文系翻译官方英文文章，侵删。文章内容质量较高，不过排版较乱（手机版排版不好，请使用PC浏览器查看）。
文章转载自：https://mc.dfrobot.com.cn/thread-308376-1-1.html
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Clang optimization levels
...dvars -loop-idiom -loop-deletion -loop-unroll -memdep -memcpyopt -sccp -demanded-bits -bdce -dse -postdomtree -adce -barrier -rpo-functionattrs -globaldce -float2int -loop-accesses -loop-distribute -loop-vectorize -loop-load-elim -alignment-from-assumptions -strip-dead-prototypes -loop-sink -instsim...
Utility classes are evil? [closed]
...is exposed through web services in json format.
In theory you can manually convert objects to strings which will be in json, but that would reinvent the wheel. Correct solution would be to include in both modules external library used to convert java objects to desired format. (in example image I ha...
Go Unpacking Array As Arguments
So in Python and Ruby there is the splat operator (*) for unpacking an array as arguments. In Javascript there is the .apply() function. Is there a way of unpacking an array/slice as function arguments in Go? Any resources for this would be great as well!
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how to get android screen size programmatically, once and for all?
...ind out my screen size programmatically,
in the units used by touch events
and View measurement/layout?
In other words, I want the coordinates
of the bottom-right corner of the screen,
in the coordinate system used by touch events'
getRawX()/getRawY() and View.getLocationOnScreen() .
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Collection was modified; enumeration operation may not execute
...irectly changing the subscribers dictionary under the hood during the loop and leading to that message. You can verify this by changing
foreach(Subscriber s in subscribers.Values)
To
foreach(Subscriber s in subscribers.Values.ToList())
If I'm right, the problem will disappear.
Calling subscribers...
Python Pandas: Get index of rows which column matches certain value
...ue
50 True
[3 rows x 1 columns]
If you have a boolean array, mask, and need ordinal index values, you can compute them using np.flatnonzero:
In [110]: np.flatnonzero(df['BoolCol'])
Out[112]: array([0, 3, 4])
Use df.iloc to select rows by ordinal index:
In [113]: df.iloc[np.flatnonzero(df...