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Collisions when generating UUIDs in JavaScript?

...rom Math.random(). For some browsers the entropy is as low as just 41 bits all together. Calling Math.random() multiple times won't raise the entropy. If you really want unique v4 UUIDs you need to use a cryptographically strong RNG that produces at least 122bit entropy per UUID generated. ...
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Why does C++ rand() seem to generate only numbers of the same order of magnitude?

...225 and 230. So, this sounds pretty normal :) Because 225 / 230 = 2-5 = 1/32 = 0.03125 = 3.125% share | improve this answer | follow | ...
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MFC 中CImageList的用法 - C/C++ - 清泛网 - 专注C/C++及内核技术

...ILC_COLOR、ILC_COLOR4、ILC_COLOR8、ILC_COLOR16、ILC_COLOR24、ILC_COLOR32、ILC_COLORDDB和ILS_MASK;nInitial用来确定图像列表包含的图像;nGrow用来确定图像列表可控制的图像数量。 nBitmapID用来确定图像列表联系的位图标志值;crMask表示颜色屏...
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Switch on Enum in Java [duplicate]

... You actually can switch on enums, but you can't switch on Strings until Java 7. You might consider using polymorphic method dispatch with Java enums rather than an explicit switch. Note that enums are objects in Java, not just symbol...
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Signed versus Unsigned Integers

...at text but I found another link. Go to the 9th page of the PDF (it is actually the 38th page of the book) and you can see the section called Data Representation (Section 1.3). It has the explanation of all the things said above. lms.uop.edu.jo/lms/pluginfile.php/2420/mod_resource/content/1/… ...
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Expert R users, what's in your .Rprofile? [closed]

... Yes, the local({ ... }) as shown in help(Startup) is what I usually do these days in Rprofile.site. Haven't needed the X11 hack in a while :) – Dirk Eddelbuettel Aug 27 '15 at 11:02 ...
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Joins are for lazy people?

...r developer who claimed to me that JOINs (SQL) are useless. This is technically true but he added that using joins is less efficient than making several requests and link tables in the code (C# or Java). ...
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How do I create a custom Error in JavaScript?

... I'm still a bit lost in all those prototype things. Why in your example you assign name to this.name and not to NotImplementedError.prototype.name? Can you answer please, it's crucial for my understanding :) – jayarjo ...
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iPhone Simulator location

Where on my machine is the iPhone simulator installed? 17 Answers 17 ...
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Android get color as string value

...olor(...)" and type it out again, use intellisense to complete the method call with the Android deprecated getColor call and you're good. – Wes Winn Apr 25 '17 at 23:00 ...