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npm: disable postinstall script for package
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edited Oct 19 '17 at 15:25
Ronan Quillevere
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Sorting a Python list by two fields
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162
like this:
import operator
list1 = sorted(csv1, key=operator.itemgetter(1, 2))
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Looping through a hash, or using an array in PowerShell
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108
Christian's answer works well and shows how you can loop through each hash table item using th...
How to get random value out of an array?
I have an array called $ran = array(1,2,3,4);
20 Answers
20
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How to remove a field completely from a MongoDB document?
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14 Answers
14
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How to implement a queue with three stacks?
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SUMMARY
O(1) algorithm is known for 6 stacks
O(1) algorithm is known for 3 stacks, but using lazy evaluation which in practice corresponds to having extra internal data structures, so it does not constitute a solution
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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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