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How do I rename a column in a database table using SQL?
...statement:
=> SELECT * FROM Test1;
id | foo | bar
----+-----+-----
2 | 1 | 2
=> ALTER TABLE Test1 RENAME COLUMN foo TO baz;
ALTER TABLE
=> SELECT * FROM Test1;
id | baz | bar
----+-----+-----
2 | 1 | 2
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How to find keys of a hash?
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275
There is function in modern JavaScript (ECMAScript 5) called Object.keys performing this opera...
What's the (hidden) cost of Scala's lazy val?
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edited Feb 20 '14 at 20:33
vergenzt
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How do I compare two files using Eclipse? Is there any option provided by Eclipse?
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352
To compare two files in Eclipse, first select them in the Project Explorer / Package Explorer / ...
How can I sanitize user input with PHP?
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edited Jul 15 '19 at 22:58
Peter Mortensen
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Serializing with Jackson (JSON) - getting “No serializer found”?
...tMapper.setVisibility(JsonMethod.FIELD, Visibility.ANY);
For Jackson >2.0:
myObjectMapper.setVisibility(PropertyAccessor.FIELD, Visibility.ANY);
For more information and details on related configuration options, I recommend reviewing the JavaDocs on ObjectMapper.setVisibility().
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How to immediately see compile errors in project tree of IntelliJ Idea?
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As of IntelliJ 12 there's an option to automatically build your project upon source changes. In "Settings" --> Build, Execution, Deployment --> "Compiler" check the checkbox "Build project automatically". This will immediately show any...
How do I do an OR filter in a Django query?
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edited Mar 2 at 17:15
phoenix
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answ...
Array Size (Length) in C#
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152
If it's a one-dimensional array a,
a.Length
will give the number of elements of a.
If b is a...