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How to add an auto-incrementing primary key to an existing table, in PostgreSQL?
... difference between GENERATED BY DEFAULT and GENERATED ALWAYS, see https://www.cybertec-postgresql.com/en/sequences-gains-and-pitfalls/.
For altering the sequence, see https://popsql.io/learn-sql/postgresql/how-to-alter-sequence-in-postgresql/.
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What is a correct mime type for docx, pptx etc?
...db application/vnd.ms-access
For further details check out this TechNet article and this blog post.
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How to see if an NSString starts with a certain other string?
...olved, which I believe the question hints at. Consider the case of "HTTP://WWW...". But the biggest problem is that the proposed solution will throw an exception when it encounters "ftp" or a string less than 4 characters. The hasPrefix method does not have the same problem.
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Why am I getting an OPTIONS request instead of a GET request?
...used to send
request data with a Content-Type other than
application/x-www-form-urlencoded, multipart/form-data, or text/plain,
e.g. if the POST request sends an XML payload to the server using
application/xml or text/xml, then the request is preflighted.
It sets custom headers in the req...
T-SQL split string
...rnatives, if splitting strings coming from the application layer:
http://www.sqlperformance.com/2012/07/t-sql-queries/split-strings
http://www.sqlperformance.com/2012/08/t-sql-queries/splitting-strings-now-with-less-t-sql
https://sqlblog.org/2010/07/07/splitting-a-list-of-integers-another-roundup
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AngularJS : When to use service instead of factory
...as we can hide implementation details of a given service."
(ref: http://www.amazon.com/Mastering-Web-Application-Development-AngularJS/dp/1782161821).
Usage
Service : Could be useful for sharing utility functions that are useful to invoke by simply appending () to the injected function refere...
Why is auto_ptr being deprecated?
...d to let go of auto_ptr, instead of modifying it.
From the link : http://www.cplusplus.com/reference/memory/unique_ptr/operator=/
Kind of assignments supported by unqiue_ptr
move assignment (1)
assign null pointer (2)
type-cast assignment (3)
copy assignment (deleted!) (4)
From : ht...
Difference between static STATIC_URL and STATIC_ROOT on Django
...tic will collect static files for deployment.
Example: STATIC_ROOT="/var/www/example.com/static/"
now the command ./manage.py collectstatic will copy all the static files(ie in static folder in your apps, static files in all paths) to the directory /var/www/example.com/static/. now you only need...
Decompile .smali files on an APK [duplicate]
... apk source files and no problems with .smali files. Here is a link http://www.hensence.com/en/smali2java/
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Change the image source on rollover using jQuery
... This doesnt work if the src is an absolute url with a . in it (like www.example.com)
– Kieran Andrews
Feb 22 '11 at 23:32
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