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Java: notify() vs. notifyAll() all over again
...ogles for "difference between notify() and notifyAll() " then a lot of explanations will pop up (leaving apart the javadoc paragraphs). It all boils down to the number of waiting threads being waken up: one in notify() and all in notifyAll() .
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In JavaScript, why is “0” equal to false, but when tested by 'if' it is not false by itself?
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The reason is because when you explicitly do "0" == false, both sides are being converted to numbers, and then the comparison is performed.
When you do: if ("0") console.log("ha"), the string value is being tested. Any non-empty string is true, while an em...
Windbg Step 2 分析程序堆栈实战 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...序堆栈实战转载+整理http: www.cnblogs.com killmyday#include"stdafx.h"#include<tchar.h>#ifdef_UNICODE#define_ttol_wtol#else#define_ttolatol#e...转载+整理 http://www.cnblogs.com/killmyday
#include "stdafx.h"
#include <tchar.h>
#ifdef _UNICODE
#define _ttol _wtol
#else
#defin...
Output to the same line overwriting previous output?
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Here's code for Python 3.x:
print(os.path.getsize(file_name)/1024+'KB / '+size+' KB downloaded!', end='\r')
The end= keyword is what does the work here -- by default, print() ends in a newline (\n) character, but this can be replaced with a differ...
What is the use of making constructor private in a class?
...or the String class, and a reasonable chunk of the API that should not be extended.
– BobMcGee
Jan 15 '10 at 16:08
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How add context menu item to Windows Explorer for folders [closed]
I have found out how to add right-click context menu items to files on Windows Explorer, by adding keys to the registry. I.e. I can right-click on a file in Explorer and run a custom app against that file.
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Making macOS Installer Packages which are Developer ID ready
Note: This is for OS X Installer packages only, packages for submission to the Mac App Store follow different rules.
5 ...
Why are flag enums usually defined with hexadecimal values
A lot of times I see flag enum declarations that use hexadecimal values. For example:
6 Answers
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Rails 2.3-style plugins and deprecation warnings running task in Heroku
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Are you using Heroku?
Heroku will inject plugins in Rails 3.x applications ..
To avoid this
injection in Rails 3, include the rails_12factor gem in your
application. (Heroku Ruby Support 2013-10-26)
The rails_12factor gem is also required in rails 4.
If this gem is not pre...