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How to remove a field completely from a MongoDB document?
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14 Answers
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Making an array of integers in iOS
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160
You can use a plain old C array:
NSInteger myIntegers[40];
for (NSInteger i = 0; i < 40; ...
How to split data into training/testing sets using sample function
...row(mtcars))
## set the seed to make your partition reproducible
set.seed(123)
train_ind <- sample(seq_len(nrow(mtcars)), size = smp_size)
train <- mtcars[train_ind, ]
test <- mtcars[-train_ind, ]
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Get most recent file in a directory on Linux
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21 Answers
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Does python have an equivalent to Java Class.forName()?
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169
Reflection in python is a lot easier and far more flexible than it is in Java.
I recommend re...
sed beginner: changing all occurrences in a folder
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149
There is no way to do it using only sed. You'll need to use at least the find utility together...
Get current time in seconds since the Epoch on Linux, Bash
I need something simple like date , but in seconds since 1970 instead of the current date, hours, minutes, and seconds.
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What is the usefulness of PUT and DELETE HTTP request methods?
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For the full specification visit:
http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html
Since current browsers unfortunately do not support any other verbs than POST and GET in HTML forms, you usually cannot utilize HTTP to it's full extent with them (you can still hijack their submission ...