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In mongoDb, how do you remove an array element by its index?
...eed the operation to be atomic, we could:
Read the document from the database
Update the document and remove the item in the array
Replace the document in the database. To ensure the document has not changed since we read it, we can use the update if current pattern described in the mongo docs
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How to zip a whole folder using PHP
...ere the zip application is in the search path. Should be true for all unix-based and I guess most windows-based servers.
exec('zip -r archive.zip "My folder"');
unlink('My\ folder/index.html');
unlink('My\ folder/picture.jpg');
The archive will reside in archive.zip afterwards. Keep in mind that ...
How to call a Parent Class's method from Child Class in Python?
...an Adam's because you demonstrated using a new-style class with the object base class. Just missing the link to new-style classes.
– Samuel
Jan 9 '15 at 21:41
add a comment
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How can I get color-int from color resource?
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Based on the new Android Support Library (and this update), now you should call:
ContextCompat.getColor(context, R.color.name.color);
According to the documentation:
public int getColor (int id)
This method was deprecat...
How to read a file into a variable in shell?
...lem for the:
value="$(cat config.txt)"
type solutions, but not for read based solutions.
Command expansion removes trailing newlines:
S="$(printf "a\n")"
printf "$S" | od -tx1
Outputs:
0000000 61
0000001
This breaks the naive method of reading from files:
FILE="$(mktemp)"
printf "a\n\n" &...
How to make “if not true condition”?
...== 0 )) ; then ...`
which also gives you the benefit of using the c-lang based comparison operators, ==,<,>,>=,<=,% and maybe a few others.
In this case, per a comment by Orwellophile, the arithmetic evaluation can be pared down even further, like
if ! (( $(grep -c "sysa" /etc/passw...
Getting Git to work with a proxy server - fails with “Request timed out”
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Thanks,guys. For me it was NTLM based authentication and just updating my .gitconfig didn't work :( . So I had to get CNTLM which uses NTLM authetication. All I had to do was point my CNTLM to my network's proxy server and then point my software update mana...
What is an index in SQL?
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An index is used to speed up searching in the database. MySQL have some good documentation on the subject (which is relevant for other SQL servers as well):
http://dev.mysql.com/doc/refman/5.0/en/mysql-indexes.html
An index can be used to efficiently find all rows matching ...
Best way to store JSON in an HTML attribute?
...
Another option is to base64 encode the JSON string and if you need to use it in your javascript decode it with the atob() function.
var data = JSON.parse(atob(base64EncodedJSON));
...
Creating a blocking Queue in .NET?
...ty
/// </summary>
public ProducerConsumerQueue()
: base(new ConcurrentQueue<T>())
{
}
/// <summary>
/// Initializes a new instance of the ProducerConsumerQueue, Use Add and TryAdd for Enqueue and TryEnqueue and Take and TryTake for Dequeue and TryDequ...