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String concatenation: concat() vs “+” operator
Assuming String a and b:
11 Answers
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How to invoke the super constructor in Python?
In all other languages I've worked with the super constructor is invoked implicitly. How does one invoke it in Python? I would expect super(self) but this doesn't work.
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What are “connecting characters” in Java identifiers?
I am reading for SCJP and I have a question regarding this line:
7 Answers
7
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How can I efficiently select a Standard Library container in C++11?
There's a well known image (cheat sheet) called "C++ Container choice". It's a flow chart to choose the best container for the wanted usage.
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Should I use a class or dictionary?
I have a class that contains only fields and no methods, like this:
9 Answers
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git stash apply version
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The keys into the stash are actually the stash@{n} items on the left. So try:
git stash apply stash@{0}
(note that in some shells you need to quote "stash@{0}", like zsh, fish and powershell).
Since version 2.11, it's pretty easy...
What's the difference between streams and datagrams in network programming?
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A long time ago I read a great analogy for explaining the difference between the two. I don't remember where I read it so unfortunately I can't credit the author for the idea, but I've also added a lot of my own knowledge to the core analogy anyway. So here goes:
A stre...
Renew Provisioning Profile
Just got a notice that the provisioning profile for one of my apps is about to expire. Is there some way I can renew the existing one or must I recreate a new one?
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Why is 128==128 false but 127==127 is true when comparing Integer wrappers in Java?
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When you compile a number literal in Java and assign it to a Integer (capital I) the compiler emits:
Integer b2 =Integer.valueOf(127)
This line of code is also generated when you use autoboxing.
valueOf is implemented such that certain numbers are "pooled...
Unexpected results when working with very big integers on interpreted languages
I am trying to get the sum of 1 + 2 + ... + 1000000000 , but I'm getting funny results in PHP and Node.js .
36 Answers
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