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In mongoDb, how do you remove an array element by its index?
...ex. In fact, this is an open issue http://jira.mongodb.org/browse/SERVER-1014 , you may vote for it.
The workaround is using $unset and then $pull:
db.lists.update({}, {$unset : {"interests.3" : 1 }})
db.lists.update({}, {$pull : {"interests" : null}})
Update: as mentioned in some of the comme...
mysql update column with value from another table
...ableA ON tableB.name = tableA.name
SET tableB.value = IF(tableA.value > 0, tableA.value, tableB.value)
WHERE tableA.name = 'Joe'
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NSDate beginning of day and end of day
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edited Jan 10 '18 at 22:54
shim
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How do I set $PATH such that `ssh user@host command` works?
...n:/usr/bin:/sbin:/bin:/usr/games). The remote machine is running Ubuntu 8.04.
6 Answers
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How to loop through all the properties of a class?
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answered Feb 10 '09 at 7:47
BrannonBrannon
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Using Java with Nvidia GPUs (CUDA)
...riting one data element from the "main" GPU memory has a latency of about 500 instructions....
Therefore, another key point for the performance of GPUs is data locality: If you have to read or write data (and in most cases, you will have to ;-)), then you should make sure that the data is kept as c...
How to add anything in through jquery/javascript?
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150
You can select it and add to it as normal:
$('head').append('<link />');
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What is the strict aliasing rule?
... = (Msg*)(buff);
// Send a bunch of messages
for (int i = 0; i < 10; ++i)
{
msg->a = i;
msg->b = i+1;
SendWord(buff[0]);
SendWord(buff[1]);
}
}
The strict aliasing rule makes this setup illegal: dereferencing a pointer that aliase...
Checking from shell script if a directory contains files
...ob # To include hidden files
files=(/some/dir/*)
if [ ${#files[@]} -gt 0 ]; then echo "huzzah"; fi
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How do I concatenate two strings in C?
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edited Jun 22 '18 at 9:00
Gaurang Tandon
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