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Find MongoDB records where array field is not empty
...h an empty list, and 5 docs with a non-empty list.
for (var i = 0; i < 1000; i++) { db.doc.insert({}); }
for (var i = 0; i < 1000; i++) { db.doc.insert({ nums: [] }); }
for (var i = 0; i < 5; i++) { db.doc.insert({ nums: [1, 2, 3] }); }
db.doc.createIndex({ nums: 1 });
I recognize this i...
Select distinct values from a table field
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answered Mar 18 '10 at 9:23
jujulejujule
9,18633 gold badges3939 silver badges5959 bronze badges
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How to change collation of database, table, column?
...eral_ci ;
– stormwild
Jul 17 '15 at 10:10
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@stormwild: this won't affect existing tables
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Incorrect syntax near ')' calling stored procedure with GETDATE
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answered Mar 8 '10 at 3:25
Mitch WheatMitch Wheat
274k3939 gold badges435435 silver badges516516 bronze badges
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Python base64 data decode
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answered Aug 12 '10 at 17:58
Blair ConradBlair Conrad
190k2424 gold badges124124 silver badges107107 bronze badges
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RESTfully design /login or /register resources?
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10
Restful indeed is a way to make yourself unhappy and waste time on things that don't matter at all.
– Jian Chen
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Function in JavaScript that can be called only once
... please?
– Juanse Cora
Oct 8 '19 at 10:06
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show 1 more comment
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Understanding typedefs for function pointers in C
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306
Consider the signal() function from the C standard:
extern void (*signal(int, void(*)(int)))(i...
How to forward declare a template class in namespace std?
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answered Oct 7 '10 at 6:41
Jon PurdyJon Purdy
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Can I call memcpy() and memmove() with “number of bytes” set to zero?
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edited Sep 22 '12 at 10:42
answered Sep 20 '10 at 13:32
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