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MongoDB - Update objects in a document's array (nested updating)
...rue);
For your question #2, the answer is easier. To increment the total and the price of item_three in any document that contains "my_item_three," you can use the $inc operator on multiple fields at the same time. Something like:
db.bar.update( {"items.item_name" : {$ne : "my_item_three" }} ,
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How do I find the authoritative name-server for a domain name?
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You'll want the SOA (Start of Authority) record for a given domain name, and this is how you accomplish it using the universally available nslookup command line tool:
command line> nslookup
> set querytype=soa
> stackoverflow.com
Server: 217.30.180.230
Address: 217.30.180....
How to read a text-file resource into Java unit test? [duplicate]
...t closing resources is particularly important. "Unit" tests should be fast and self contained, leaving resources open, potentially for the duration of the test run, means at best your tests run slower, and at worst fail in difficult-to-diagnose ways.
– dimo414
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Passing an array as a function parameter in JavaScript
...sociative array (named keys) instead, then use an object. Coming from PHP (and always led to this thread by google) this took me a while to figure out. You can pass the whole object as a parameter then. w3schools.com/js/js_objects.asp
– timhc22
May 29 '14 at 8:...
Passing two command parameters using a WPF binding
I have a command which I am executing from my XAML file using the following standard syntax:
5 Answers
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How to install multiple python packages at once using pip
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For installing multiple packages on the command line, just pass them as a space-delimited list, e.g.:
pip install wsgiref boto
For installing from a text file, then, from pip install --help:
-r FILENAME, --requirement=FILENAME
Install all the packages listed in the g...
using lodash .groupBy. how to add your own keys for grouped output?
... head around. Can you explain the steps in between, especially the pairing and zipping (and the double zip, since _.object is an alias for _.zipObject).
– Benny Bottema
Jul 31 '15 at 9:17
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Extracting substrings in Go
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It looks like you're confused by the working of slices and the string storage format, which is different from what you have in C.
any slice in Go stores the length (in bytes), so you don't have to care about the cost of the len operation : there is no need to count
Go strings a...
New line in Sql Query
...blog.sqlauthority.com/2009/07/01/sql-server-difference-between-line-feed-n-and-carriage-return-r-t-sql-new-line-char/
DECLARE @NewLineChar AS CHAR(2) = CHAR(13) + CHAR(10)
PRINT ('SELECT FirstLine AS FL ' + @NewLineChar + 'SELECT SecondLine AS SL')
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How do I grep for all non-ASCII characters?
I have several very large XML files and I'm trying to find the lines that contain non-ASCII characters. I've tried the following:
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