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How to use double or single brackets, parentheses, curly braces
...0000000; i++)); do [[ "$i" = 1000 ]]; done
real 0m24.548s
user 0m24.337s
sys 0m0.036s
$ time for ((i=0; i<10000000; i++)); do [ "$i" = 1000 ]; done
real 0m33.478s
user 0m33.478s
sys 0m0.000s
The braces, in addition to delimiting a variable name are used for parameter expansion so ...
How to assign a Git SHA1's to a file without Git?
...or example, the hash of an empty file:
sha1("blob 0\0") = "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"
$ touch empty
$ git hash-object empty
e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
Another example:
sha1("blob 7\0foobar\n") = "323fae03f4606ea9991df8befbb2fca795e648fa"
$ echo "foobar" > foo.tx...
How to compare only date components from DateTime in EF?
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edited May 23 '17 at 12:34
Community♦
111 silver badge
answered Sep 25 '09 at 16:10
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SQL “select where not in subquery” returns no results
...east one of the values is NULL.
Suppose we have these data:
common
--
1
3
table1
--
NULL
1
2
LEFT JOIN / IS NULL and NOT EXISTS will return 3, NOT IN will return nothing (since it will always evaluate to either FALSE or NULL).
In MySQL, in case on non-nullable column, LEFT JOIN / IS NULL and...
Is there a way to call a stored procedure with Dapper?
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365
In the simple case you can do:
var user = cnn.Query<User>("spGetUser", new {Id = 1},
...
What is the 'instanceof' operator used for in Java?
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Cache Staheli
2,73566 gold badges2828 silver badges3737 bronze badges
answered Sep 5 '11 at 23:37
user166390user166390...
Get records with max value for each group of grouped SQL results
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130
There's a super-simple way to do this in mysql:
select *
from (select * from mytable order by ...
Best exception for an invalid generic type argument
I'm currently writing some code for UnconstrainedMelody which has generic methods to do with enums.
11 Answers
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How to wait for async method to complete?
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137
Avoid async void. Have your methods return Task instead of void. Then you can await them.
Like...
What is the difference between iterator and iterable and how to use them?
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13 Answers
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