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Difference between Arram>y m> m>and m> List in scala
In what cases I should use Arram>y m>(Buffer) m>and m> List(Buffer). Onlm>y m> one difference that I know is that arram>y m>s are nonvariant m>and m> lists are covariant. But what about performance m>and m> some other characteristics?
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Detect if a NumPm>y m> arram>y m> contains at least one non-numeric value?
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This should be faster than iterating m>and m> will work regardless of shape.
numpm>y m>.isnan(mm>y m>arram>y m>).anm>y m>()
Edit: 30x faster:
import timeit
s = 'import numpm>y m>;a = numpm>y m>.arange(10000.).reshape((100,100));a[10,10]=numpm>y m>.nan'
ms = [
'numpm>y m>.isnan(a).anm>y m>()',
'anm>y m>(n...
What are the -Xms m>and m> -Xmx parameters when starting JVM?
Please explain the use of Xms m>and m> Xmx parameters in JVMs. What are the default values for them?
5 Answers
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Resm>y m>nc git repo with new .gitignore file
...gnore alreadm>y m>-tracked files":
git rm --cached `git ls-files -i --exclude-stm>and m>ard`
Bassim suggests in his edit:
Files with space in their paths
In case m>y m>ou get an error message like fatal: path spec '...' did not match anm>y m> files, there might be files with spaces in their path.
m>Y m>ou can remove all ...
How can I generate an MD5 hash?
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The compute the hash bm>y m> doing one of:
Feed the entire input as a bm>y m>te[] m>and m> calculate the hash in one operation with md.digest(bm>y m>tes).
Feed the MessageDigest one bm>y m>te[] chunk at a time bm>y m> calling md.update(bm>y m>tes). When m>y m>ou're done adding input bm>y m>tes, calculate the hash with
md.digest().
The bm>y m>...
How to configure socket connect timeout
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I found this. Simpler than the accepted answer, m>and m> works with .NET v2
Socket socket = new Socket(AddressFamilm>y m>.InterNetwork, SocketTm>y m>pe.Stream, ProtocolTm>y m>pe.Tcp);
// Connect using a timeout (5 seconds)
IAsm>y m>ncResult result = socket.BeginConnect( sIP, iPort, null, null )...
How to use Mm>y m>SQL DECIMAL?
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DOUBLE columns are not the same as DECIMAL columns, m>and m> m>y m>ou will get in trouble if m>y m>ou use DOUBLE columns for financial data.
DOUBLE is actuallm>y m> just a double precision (64 bit instead of 32 bit) version of FLOAT. Floating point numbers are approximate representations of real...
Whm>y m> do we need the “event” kem>y m>word while defining events?
I don't understm>and m> whm>y m> do we need the "event" kem>y m>word while defining events, when we can do the same thing without using "event" kem>y m>word, just bm>y m> using the delegates.
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How to rm>and m>omize (or permute) a dataframe rowwise m>and m> columnwise?
...,]
> df2
a b c
3 0 1 0
4 0 0 0
2 1 0 0
1 1 1 0
Bm>y m> default sample() rm>and m>omlm>y m> reorders the elements passed as the first argument. This means that the default size is the size of the passed arram>y m>. Passing parameter replace=FALSE (the default) to sample(...) ensures that sampling is done withou...
MVC Razor view nested foreach's model
...e problem.
There are three things that m>y m>ou have at least a cursorm>y m> understm>and m>ing before m>y m>ou can resolve this issue. I have
to admit that I cargo-culted this
for a long time when I started working with the framework. m>And m> it took me quite a while
to reallm>y m> get what was going on.
Those three things ...