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How to convert a Django QuerySet to a list
... As far as i know, django queryset does not support negative indexing.
– Alexey Sidash
Aug 30 '16 at 7:21
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Mongoose's find method with $or condition does not work properly
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According to mongoDB documentation: "...That is, for MongoDB to use indexes to evaluate an $or expression, all the clauses in the $or expression must be supported by indexes."
So add indexes for your other fields and it will work. I had a similar problem and this solved it.
You can read m...
Principles for Modeling CouchDB Documents
... along those lines.
MongoDB handles documents a bit differently, allowing indexes to be built on sub-elements of a document, so you might see the same question on the MongoDB mailing list and someone saying "just make the comments a property of the parent post".
Because of the write locking and si...
Ways to save Backbone.js model data?
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Basically Models have a property called attributes which are the various values a certain model may have. Backbone uses JSON objects as a simple way to populate these values using various methods that take JSON objects. Example:
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Java: parse int value from a char
... from a character in a string (assuming that we know that the character at index n is a number).
7 Answers
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How do I list all tables in a schema in Oracle SQL?
...ects; Package Bodies and Packages both appear in that view, and Tables and Indexes are in different namespaces.
– Adam Musch
Aug 20 '13 at 20:59
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Fastest way to extract frames using ffmpeg?
...is is about 20 times faster. We use fast seeking to go to the desired time index and extract a frame, then call ffmpeg several times for every time index. Note that -accurate_seek is the default
, and make sure you add -ss before the input video -i option.
Note that it's better to use -filter:v -fp...
Remove all special characters from a string [duplicate]
...le to convert titles that could contain anything and have them stripped of all special characters so they only have letters and numbers and of course I would like to replace spaces with hyphens.
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Linux command to print directory structure in the form of a tree
...sk
|-apparmor
|-apt
|---archives
|-----partial
|-apt-xapian-index
|---index.1
|-dbconfig-common
|---backups
|-debconf
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Change values while iterating
...lue (if 2nd variable is present)
array or slice a [n]E, *[n]E, or []E index i int a[i] E
So, range uses a[i] as its second value for arrays/slices, which effectively means that the
value is copied, making the original value untouchable.
This behavior is demonstrated by the f...