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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...
Matplotlib tight_layout() doesn't take into account figure suptitle
...e care of that? I tried the tight_layout() function, but it only makes things worse.
10 Answers
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Should I use a class or dictionary?
I have a class that contains only fields and no methods, like this:
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String concatenation: concat() vs “+” operator
Assuming String a and b:
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HTML 5 tag vs Flash video. What are the pros and cons?
... now. Flash is hard on its way out; <video> support is ubiquitous, including mobile devices. Almost anything that Flash could do, HTML can now do too. HTML won, Flash lost. If you're pondering on how to embed video in your page, just use <video> and don't give it a second thought. Th...
What's the meaning of interface{}?
I'm new to interfaces and trying to do SOAP request by github
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Why use static_cast(x) instead of (int)x?
...cast function should be preferred to C-style or simple function-style casting. Is this true? Why?
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Insert an element at a specific index in a list and return the updated list
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l.insert(index, obj) doesn't actually return anything. It just updates the list.
As ATO said, you can do b = a[:index] + [obj] + a[index:].
However, another way is:
a = [1, 2, 4]
b = a[:]
b.insert(2, 3)
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How to revert uncommitted changes including files and folders?
Is there a git command to revert all uncommitted changes in a working tree and index and to also remove newly created files and folders?
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Singleton with Arguments in Java
I was reading the Singleton article on Wikipedia and I came across this example:
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