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random.seed(): What does it do?
...random.randint()') which generates these values on the basis of this seed. One of the must properties of random numbers is that they should be reproducible. When you put same seed, you get the same pattern of random numbers. This way you are generating them right from the start. You give a different...
For each row return the column name of the largest value
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One option using your data (for future reference, use set.seed() to make examples using sample reproducible):
DF <- data.frame(V1=c(2,8,1),V2=c(7,3,5),V3=c(9,6,4))
colnames(DF)[apply(DF,1,which.max)]
[1] "V3" "V1" "V2"
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How can I remove specific rules from iptables?
... table (eg nat), you have to add it to the delete command (thx to @ThorSummoner for the comment)
sudo iptables -t nat -D PREROUTING 1
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What are the best practices to follow when declaring an array in Javascript?
...t
Note that there's no way with new Array() to create an array with just one pre-specified number element in it!
Using [] is actually more efficient, and safer too! It's possible to overwrite the Array constructor and make it do odd things, but you can't overwrite the behaviour of [].
Personall...
How to fire AJAX request Periodically?
...setInterval(). If the first request hasn't completed and you start another one, you could end up in a situation where you have multiple requests that consume shared resources and starve each other. You can avoid this problem by waiting to schedule the next request until the last one has completed:
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Is it safe to parse a /proc/ file?
...onsistent snapshot.
For example:
/proc/uptime is totally atomic, as someone mentioned in another answer -- but only since Linux 2.6.30, which is less than two years old. So even this tiny, trivial file was subject to a race condition until then, and still is in most enterprise kernels. See fs/p...
Fast ceiling of an integer division in C / C++
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The second one has a problem where x is 0. ceil(0/y) = 0 but it returns 1.
– Omry Yadan
May 27 '13 at 0:52
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How to delete a folder with files using Java
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Just a one-liner.
import org.apache.commons.io.FileUtils;
FileUtils.deleteDirectory(new File(destination));
Documentation here
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The key must be an application-specific resource id
...n a resources file to guarantee uniqueness.
If the view will only contain one tag though you can just do
setTag(objContact.onlineid);
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How to change language settings in R
...this two commands from a command prompt:
cd \
dir Rconsole /s
The first one make the root as the current directory, the second one looks for the Rconsole file.
In the following screenshot you have that Rconsole file is in the folder C:\Program Files\R\R-3.4.1\etc.
You may have more than one loc...