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Difference between java.util.Random and java.security.SecureRandom

...l purposes. This also means that your random numbers are predictable right now, something you don't want for session IDs and the like. How to break a Linear Congruential Generator The assumption that an attacker would have to wait for the LCG to repeat after a full cycle is wrong. Even with an opt...
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Python extending with - using super() Python 3 vs Python 2

...o by doing nothing in C, you end up calling both, which is what you want. Now if you were not using super, you would end up inheriting A.__init__ (as before) but this time there's nothing that would call B.__init__ for you. class A: def __init__(self): print('A') class B: def __in...
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How can I create directory tree in C++/Linux?

...an only show the presence of bugs, never their absence). The code shown is now v1.16; there have been cosmetic or administrative changes made since v1.13 (such as use mkpath.h instead of jlss.h and include <unistd.h> unconditionally in the test code only). It's reasonable to argue that "syssta...
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Fragment in ViewPager using FragmentPagerAdapter is blank the second time it is viewed

... I removed it from my code now. The fragment manager was causing the issue. Try toggling between getchildfragmentmanager and getfragmentmanager – j2emanue Nov 1 '17 at 1:27 ...
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Push to GitHub without a password using ssh-key

...e directory. cp /c/Users/Yuci/.ssh/github_rsa /c/Users/Yuci/.ssh/id_rsa Now when I run ssh -vT git@github.com again, I have: ... debug1: Trying private key: /c/Users/Yuci/.ssh/id_rsa debug1: Authentication succeeded (publickey). ... Hi <my username>! You've successfully authenticated, but ...
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python generator “send” function purpose?

... @Tommy: I would say if you really wanna know check out this presentation and work through it all. A short answer won't suffice because then you'll just say "But can't I just do it like this?" etc. – Claudiu Oct 10 '13 at 18:45 ...
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How does Bluebird's util.toFastProperties function make an object's properties “fast”?

...object->HasFastProperties()) { MigrateSlowToFast(object, 0); } } Now, JSObject::MigrateSlowToFast just explicitly takes the Dictionary and converts it into a fast V8 object. It's a worthwhile read and an interesting insight into v8 object internals - but it's not the subject here. I still ...
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Use Mockito to mock some methods but not others

...mock.getSomething(); when(mock.getSomething()).thenReturn(fakeValue); // now fakeValue is returned value = mock.getSomething(); share | improve this answer | follow ...
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Django: How to manage development and production settings?

I have been developing a basic app. Now at the deployment stage it has become clear I have need for both a local settings and production settings. ...
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Android Reading from an Input stream efficiently

....readLine()) != null; ) { total.append(line).append('\n'); } You can now use total without converting it to String, but if you need the result as a String, simply add: String result = total.toString(); I'll try to explain it better... a += b (or a = a + b), where a and b are Strings, copie...