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Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
...look more in-depth at why Hash.new([]) doesn’t work:
h = Hash.new([])
h[0] << 'a' #=> ["a"]
h[1] << 'b' #=> ["a", "b"]
h[1] #=> ["a", "b"]
h[0].object_id == h[1].object_id #=> true
h #=> {}
We can see that our default object is being reused and mutated (t...
Using HTML5/Canvas/JavaScript to take in-browser screenshots
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+50
JavaScript can read the DOM and render a fairly accurate representation of that using canvas. I have been working on a script which co...
Algorithm to detect corners of paper sheet in photo
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John_West
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answered Jul 10 '11 at 22:47
Daniel CrowleyDani...
How to find out the number of CPUs using python
...thony Sottile
33.3k99 gold badges6666 silver badges100100 bronze badges
answered Jun 17 '09 at 10:53
Nadia AlramliNadia Alramli
94...
How to tell if a tag failed to load
...d I'd like to be able to tell whether the loading failed in some way -- a 404, a script error in the loaded script, whatever.
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Check if a string contains a string in C++
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Guy Avraham
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answered Feb 26 '10 at 8:24
Matthieu N.Matthieu N...
Why does PHP consider 0 to be equal to a string?
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You are doing == which sorts out the types for you.
0 is an int, so in this case it is going to cast 'e' to an int. Which is not parsable as one and will become 0. A string '0e' would become 0 and would match!
Use ===
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Converting file size in bytes to human-readable string
...ng, floppy disks use a mixture of the two systems - their 1MB is actually 1024000 bytes.
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When should I use Lazy?
I found this article about Lazy : Laziness in C# 4.0 – Lazy
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