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Best algorithm for detecting cycles in a directed graph [closed]
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Best way to concatenate List of String objects? [duplicate]
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46
Your approach is dependent on Java's ArrayList#toString() implementation.
While the implementa...
How to find controls in a repeater header or footer
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edited Feb 6 '14 at 23:18
community wiki
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Count number of occurences for each unique value
...ommon entries are.
– Torvon
Dec 1 '14 at 16:25
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@Torvon - sure, just use order() on the results....
Is there any difference between a GUID and a UUID?
...-20 Update: While GUIDs (as used by Microsoft) and UUIDs (as defined by RFC4122) look similar and serve similar purposes, there are subtle-but-occasionally-important differences. Specifically, some Microsoft GUID docs allow GUIDs to contain any hex digit in any position, while RFC4122 requires cert...
PHP - how to best determine if the current invocation is from CLI or web server?
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edited Mar 12 '12 at 5:34
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In MySQL, can I copy one row to insert into the same table?
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Grim...Grim...
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What is (functional) reactive programming?
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edited Jul 24 '17 at 18:26
answered Jun 23 '09 at 4:31
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Remove by _id in MongoDB console
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Very close. This will work:
db.test_users.deleteOne( {"_id": ObjectId("4d512b45cc9374271b02ec4f")});
i.e. you don't need a new for the ObjectId.
Also, note that in some drivers/tools, remove() is now deprecated and deleteOne or deleteMany should be used instead.
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What's the state of the art in email validation for Rails?
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answered Aug 24 '10 at 9:56
HallelujahHallelujah
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