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What are type lambdas in Scala and what are their benefits?
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Type lambdas are vital quite a bit of the time when you are working with higher-kinded types.
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How do I list all cron jobs for all users?
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1149
You would have to run this as root, but:
for user in $(cut -f1 -d: /etc/passwd); do crontab ...
Finding the index of an item in a list
..., "bar", "baz"] and an item in the list "bar" , how do I get its index ( 1 ) in Python?
31 Answers
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How can I pass a member function where a free function is expected?
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146
There isn't anything wrong with using function pointers. However, pointers to non-static membe...
How to remove an element from a list by index
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18 Answers
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What is the pythonic way to detect the last element in a 'for' loop?
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154
Most of the times it is easier (and cheaper) to make the first iteration the special case inst...
Listing all permutations of a string/integer
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158
First of all: it smells like recursion of course!
Since you also wanted to know the principle,...
How to atomically delete keys matching a pattern using Redis
...g like this
EVAL "return redis.call('del', unpack(redis.call('keys', ARGV[1])))" 0 prefix:[YOUR_PREFIX e.g delete_me_*]
Warning: As the Redis document says, because of performance maters, keys
command should not use for regular operations in production, this
command is intended for debuggi...