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Unable to create/open lock file: /data/mongod.lock errno:13 Permission denied
...untu ec2 instance. I was following this amazon article on page 7:
http://d36cz9buwru1tt.cloudfront.net/AWS_NoSQL_MongoDB.pdf
Mongodb path in /etc/mongodb.conf was set to /var/lib/mongodb (primary install location and working). When I changed to /data/db (EBS volume) I was getting 'errno:13 Permiss...
Get a specific bit from byte
... the fourth bit, we perform:
1 (2^0) << (4-1) == 8 (2^3)
00000001 << (4-1) == 00001000
Now you know how it's done, what's going on at the low level, and why it works.
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TFS Code Reviews - Show updated files in response to comments
...ginning to use the code review functionality built-in to VS 2012 and VS 2013 preview. Requesting the review and adding comments seem pretty straightforward. If someone adds comments requesting the code to be changed, then how does the requester make these changes and show them?
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Full Screen Theme for AppCompat
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edited Jul 25 '18 at 12:23
Krishna Raj Salim
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Excel VBA App stops spontaneously with message “Code execution has been halted”
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edited Apr 30 '15 at 17:59
ZX9
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answe...
Copy to clipboard in Node.js?
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chjjchjj
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Is there a way that I can check if a data attribute exists?
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300
if ($("#dataTable").data('timer')) {
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}
NOTE this only returns true if the data attribu...
node.js execute system command synchronously
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13 Answers
13
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Generate a random number in the range 1 - 10
... min | max
-----------------+------------------
1.0000083274208 | 9.99999571684748
(1 row)
If you want integers, that are >= 1 and < 10, then it's simple:
select trunc(random() * 9 + 1)
And again, simple test:
# select min(i), max(i) from (
select trunc(random() * ...
Case-insensitive search in Rails model
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371
You'll probably have to be more verbose here
name = "Blue Jeans"
model = Product.where('lower...