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How to create a sub array from another array in Java?
...
You can use
JDK > 1.5
Arrays.copyOfRange(Object[] src, int from, int to)
Javadoc
JDK <= 1.5
System.arraycopy(Object[] src, int srcStartIndex, Object[] dest, int dstStartIndex, int lengthOfCopiedIndices);
Javadoc
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Generate a random point within a circle (uniformly)
...dom()+random() generates radii more likely to be around 1.0 but lie in the range 0.0-2.0. When folded down they're more likely to be around 1.0 and always in the range 0.0-1.0. What's more, it's exactly the proportion needed in the first sentence of this comment. Just halving produces more numbers a...
What's the syntax for mod in java
...modular because n (mod m) IS ALWAYS >= 0 but not n % m. n % m is in the range > -m and < m. Although Java has a remainder operator for int and long types, it has no modulus function or operator. I.e., -12 % 10 = -2 whereas -12 mod 10 = 8. If % operator returns a negative value for n % m, th...
Why is printing to stdout so slow? Can it be sped up?
...fp = file("out.txt", "w", 1) # line-buffered, like stdout
[...]
for x in range(lineCount):
fp.write(line)
os.fsync(fp.fileno()) # wait for the write to actually complete
I ran your file writing test on my machine, and with buffering, it also 0.05s here for 100,000 lines.
However, w...
What is the Python equivalent of Matlab's tic and toc functions?
... the jitter of measuring any Python statement is easily in the microsecond range (and much more when used from IPython). At this point, the overhead of the Python implementation becomes negligible, so that it can be used with the same confidence as the C implementation.
I found that the usefulness...
Javascript: Round up to the next multiple of 5
I need a utility function that takes in an integer value (ranging from 2 to 5 digits in length) that rounds up to the next multiple of 5 instead of the nearest multiple of 5. Here is what I got:
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Which $_SERVER variables are safe?
...ese are "safe" or not depend on how (and where) they are defined. They can range from completely server controlled to completely user controlled.
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How can I color Python logging output?
...at I end up with:
BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = range(8)
#The background is set with 40 plus the number of the color, and the foreground with 30
#These are the sequences need to get colored ouput
RESET_SEQ = "\033[0m"
COLOR_SEQ = "\033[1;%dm"
BOLD_SEQ = "\033[1m"
def fo...
Get last result in interactive Python shell
...6]: _1 + _2
Out[6]: 42
In [7]: _6
Out[7]: 42
And it is possible to edit ranges of lines with the %ed macro too:
In [1]: def foo():
...: print "bar"
...:
...:
In [2]: foo()
bar
In [3]: %ed 1-2
sh...
When should I use perror(“…”) and fprintf(stderr, “…”)?
...For example, strtol will return LONG_MAX or LONG_MIN if a string is out of range and set errno to ERANGE. So if strtol fails due to out of range, I would use perror.
– freeboy1015
Aug 24 '12 at 2:22
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