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Generating random numbers in Objective-C
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awk without printing newline
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awk '{sum+=$3}; END {printf "%f",sum/NR}' ${file}_${f}_v1.xls >> to-plot-p.xls
print will insert a newline by default. You dont want that to happen, hence use printf instead.
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JavaScript function to add X months to a date
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How to convert a string or integer to binary in Ruby?
...a string representing the number in the base specified:
9.to_s(2) #=> "1001"
while the reverse is obtained with String#to_i(base):
"1001".to_i(2) #=> 9
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Using [UIColor colorWithRed:green:blue:alpha:] doesn't work with UITableView seperatorColor?
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211
You need to divide by 255.0
Because I hardly ever use values between 1.0 and 0.0, I created a ...
Does Java support default parameter values?
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For constructors, See Effective Java: Programming Language Guide's Item 1 tip (Consider static factory methods instead of constructors) if the overloading is getting complicated. For other methods, renaming some cases or using a parameter object can help. This is when you have enough complexity t...
Show data on mouseover of circle
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182
I assume that what you want is a tooltip. The easiest way to do this is to append an svg:title...
How to get a pixel's x,y coordinate color from an image?
...lData = canvas.getContext('2d').getImageData(event.offsetX, event.offsetY, 1, 1).data;
Because you are only grabbing one pixel, pixelData is a four entry array containing the pixel's R, G, B, and A values. For alpha, anything less than 255 represents some level of transparency with 0 being fully ...
ASP.NET Identity's default Password Hasher - How does it work and is it secure?
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using (Rfc2898DeriveBytes bytes = new Rfc2898DeriveBytes(password, 0x10, 0x3e8))
{
salt = bytes.Salt;
buffer2 = bytes.GetBytes(0x20);
}
byte[] dst = new byte[0x31];
Buffer.BlockCopy(salt, 0, dst, 1, 0x10);
Buffer.BlockCopy(buffer2, 0, dst, 0x11, 0x20);
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How do I find out which process is locking a file using .NET?
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answered Nov 25 '08 at 11:48
oriporip
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