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Using sed, how do you print the first 'N' characters of a line?
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Validating URL in Java
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For the benefit of the community, since this thread is top on Google when searching for
"url validator java"
Catching exceptions is expensive, and should be avoided when possible. If you just want to verify your String is a valid URL, you can us...
Will HTML5 allow web apps to make peer-to-peer HTTP connections?
...nnections from javascript, but these connections WILL NOT BE RAW TCP.
The complete spec can be found at http://dev.w3.org/html5/websockets/
jrh
EDIT: with specific reference to peer to peer connections, check out these links:
Regarding peer to peer connections: http://www.w3.org/TR/2008/WD-html...
How do you append to an already existing string?
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How do you set the text in an NSTextField?
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Stack vs heap allocation of structs in Go, and how they relate to garbage collection
...p and some things go on the stack and some on the heap. In some cases the compiler follows rigid rules (like "new always allocates on the heap") and in others the compiler does "escape analysis" to decide if an object can live on the stack or if it must be allocated on the heap.
In your example 2,...
When to use cla(), clf() or close() for clearing a plot in matplotlib?
...s import matplotlib.pyplot as plt.
In this case, there are three different commands that remove stuff:
plt.cla() clears an axes, i.e. the currently active axes in the current figure. It leaves the other axes untouched.
plt.clf() clears the entire current figure with all its axes, but leaves the wi...
Linq to Entities join vs groupjoin
...t a GroupJoin is? How is it different from a regular inner Join ? Is it commonly used? Is it only for method syntax? What about query syntax? A c# code example would be nice.
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What is the difference between CascadeType.REMOVE and orphanRemoval in JPA?
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