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Find objects between two dates MongoDB
... work.
items.save({
name: "example",
created_at: ISODate("2010-04-30T00:00:00.000Z")
})
items.find({
created_at: {
$gte: ISODate("2010-04-29T00:00:00.000Z"),
$lt: ISODate("2010-05-01T00:00:00.000Z")
}
})
=> { "_id" : ObjectId("4c0791e2b9ec877893f3363b"), "name" : ...
Code Golf - π day
...
In dc: 88 and 93 93 94 96 102 105 129 138 141 chars
Just in case, I am using OpenBSD and some supposedly non-portable extensions at this point.
93 chars. This is based on same formula as FORTRAN solution (slightly different results than t...
Merging two arrays in .NET
...le).
– CodesInChaos
Apr 16 '12 at 7:35
2
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What is array to pointer decay?
...nt numbers [5] cannot be re-pointed, i.e. you can't say numbers = 0x5a5aff23. More importantly the term decay signifies loss of type and dimension; numbers decay into int* by losing the dimension information (count 5) and the type is not int [5] any more. Look here for cases where the decay doesn't ...
Parallel foreach with asynchronous lambda
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answered Feb 28 '13 at 13:30
Stephen ClearyStephen Cleary
349k6363 gold badges575575 silver badges699699 bronze badges
...
Summarizing multiple columns with dplyr? [duplicate]
...df %>% group_by(grp) %>% summarise_all(list(mean))
#> # A tibble: 3 x 5
#> grp a b c d
#> <int> <dbl> <dbl> <dbl> <dbl>
#> 1 1 3.08 2.98 2.98 2.91
#> 2 2 3.03 3.04 2.97 2.87
#> 3 3 2.85 2.95 2.95 3.06...
Are nested transactions allowed in MySQL?
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QuassnoiQuassnoi
369k8181 gold badges571571 silver badges582582 bronze badges
...
Get most recent file in a directory on Linux
... |
edited Jun 18 '09 at 23:19
answered Jun 18 '09 at 23:17
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What is dynamic programming? [closed]
...
DimaSan
9,53188 gold badges4848 silver badges6363 bronze badges
answered Jun 30 '09 at 19:12
samozsamoz
...