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Creating Multifield Indexes in Mongoose / MongoDB
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1 and -1 specifies a ascending or a descending index key on the index field. I found docs http://mongodb.github.io/node-mongodb-native/2.1/tutorials/create-indexes/
– Thai Ha
Feb 11 '19 at 3:36
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Using NSPredicate to filter an NSArray based on NSDictionary keys
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to clarify for new coders like me, the key line of code is 'NSArray *filtered = [data filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"(BAR == %@)", @"foo"]];' where 'data' is the nsarray of nsdictionaries that is alre...
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... 23.5GB / 24GB 1333MHz == 6 x 4GB, 12 x empty
Disk-Control: megaraid_sas0: Dell/LSILogic PERC 6/i, Package 6.2.0-0013, FW 1.22.02-0612,
Network: eth0 (bnx2):Broadcom NetXtreme II BCM5709 Gigabit Ethernet,1000Mb/s
OS: RHEL Server 5.4 (Tikanga), Linux 2.6.18-164.el5 x86...
How to do a batch insert in MySQL
...eration or batch insert , but batch insert has its limitaion of characters if your query exceeds this number of characters set in mysql then your query will crash , So I suggest insert data in chunks withs batch insert , this will minimize number of connections established with database.best of luck...
Does Ruby have a string.startswith(“abc”) built in method?
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Your question title and your question body are different. Ruby does not have a starts_with? method. Rails, which is a Ruby framework, however, does, as sepp2k states. See his comment on his answer for the link to the documentation for it.
You could always use a regular ex...
Why do we check up to the square root of a prime number to determine if it is prime?
... is not a prime, it can be factored into two factors a and b:
n = a * b
Now a and b can't be both greater than the square root of n, since then the product a * b would be greater than sqrt(n) * sqrt(n) = n. So in any factorization of n, at least one of the factors must be smaller than the square ...
Why would one use the Publish/Subscribe pattern (in JS/jQuery)?
...ing is an Object-oriented principle in which each component of the system knows its responsibility and doesn’t care about the other components (or at least tries to not care about them as much as possible). Loose coupling is a good thing because you can easily reuse the different modules. You’re...
How can I manipulate the strip text of facet_grid plots?
... plots. My question
is similar to a question on plot titles , but I'm specifically concerned with
manipulating not the plot title but the text that appears in facet titles (strip_h).
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How to amend older Git commit? [duplicate]
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git rebase -i HEAD^^^
Now mark the ones you want to amend with edit or e (replace pick). Now save and exit.
Now make your changes, then
git add .
git rebase --continue
If you want to add an extra delete remove the options from the commit comma...
Why should I use version control? [closed]
... just use anything at all to start with - then after a while when you know a bit, read up on alternatives and try one of them out, then another and so on
– 1800 INFORMATION
Sep 11 '09 at 0:56
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