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List tables in a PostgreSQL schema
...dt in psql I only get a listing of tables in the current schema ( public by default).
4 Answers
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Correct format specifier for double in printf
...the current standard -- the l is specified as having no effect if followed by the f conversion specifier (among others).
Note that this is one place that printf format strings differ substantially from scanf (and fscanf, etc.) format strings. For output, you're passing a value, which will be promot...
Django: Get an object form the DB, or 'None' if nothing matches
...u can use the first() Queryset method. It returns the first object matched by the queryset, or None if there is no matching object.
Usage:
p = Article.objects.order_by('title', 'pub_date').first()
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How to edit log message already committed in Subversion?
...es are kept in the
repository as properties attached to
each revision. By default, the log
message property (svn:log) cannot be
edited once it is committed. That is
because changes to revision properties
(of which svn:log is one) cause the
property's previous value to be
permanently ...
Java naming convention for static final variables [duplicate]
...ds, acronyms, or abbreviations, all uppercase, with components
separated by underscore "_" characters. Constant names should be
descriptive and not unnecessarily abbreviated. Conventionally they may
be any appropriate part of speech. Examples of names for constants
include MIN_VALUE, MAX_VAL...
Order of serialized fields using JSON.NET
...will only work if you set an order greater than 1 on all other properties. By default any property without an Order setting will be given an order of -1. So you must either give all serialized properties and order, or set your first item to -2
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Set timeout for ajax (jQuery)
...s timeout to 3 seconds
});
You can get see what type of error was thrown by accessing the textStatus parameter of the error: function(jqXHR, textStatus, errorThrown) option. The options are "timeout", "error", "abort", and "parsererror".
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Explain the “setUp” and “tearDown” Python methods used in test cases
...f you have a lot of repeated code in your tests, you can make them shorter by moving this code to setUp/tearDown.
You might use this for creating test data (e.g. setting up fakes/mocks), or stubbing out functions with fakes.
If you're doing integration testing, you can use check environmental pre-...
Using CMake with GNU Make: How can I see the exact commands?
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By the way, if you are on a platform that supports it cmake -GNinja . ; ninja -v shows a very nice verbose output with minimal fluff.
– richq
Oct 7 '15 at 12:55
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Difference between Hive internal tables and external tables?
...difference comes when dropping the table. I don't understand what you mean by the data and metadata is deleted in internal and only metadata is deleted in external tables.
Can anyone explain me in terms of nodes please.
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