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How to set data attributes in HTML elements
I have a div with an attribute data-myval = "10" . I want to update its value; wouldn't it change if I use div.data('myval',20) ? Do I need to use div.attr('data-myval','20') only?
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What is a “bundle” in an Android application
What is a bundle in an Android application? When to use it?
12 Answers
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Is it OK to use == on enums in Java?
Is it OK to use == on enums in Java, or do I need to use .equals() ? In my testing, == always works, but I'm not sure if I'm guaranteed of that. In particular, there is no .clone() method on an enum, so I don't know if it is possible to get an enum for which .equals() would return a diffe...
Test if executable exists in Python?
In Python, is there a portable and simple way to test if an executable program exists?
21 Answers
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ERROR: permission denied for sequence cities_id_seq using Postgres
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Since PostgreSQL 8.2 you have to use:
GRANT USAGE, SELECT ON SEQUENCE cities_id_seq TO www;
GRANT USAGE - For sequences, this privilege allows the use of the currval and nextval functions.
Also as pointed out by @epic_fil in the comments you can grant...
Intent - if activity is running, bring it to front, else start a new one (from notification)
...art a new activity every time so I get multiple same activities running on top of each other, which is just wrong.
8 Answer...
Explanation of BASE terminology
The BASE acronym is used to describe the properties of certain databases, usually NoSQL databases. It's often referred to as the opposite of ACID .
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How to read a file into a variable in shell?
I want to read a file and save it in variable, but I need to keep the variable and not just print out the file.
How can I do this? I have written this script but it isn't quite what I needed:
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How do I serialize a C# anonymous type to a JSON string?
I'm attempting to use the following code to serialize an anonymous type to JSON:
8 Answers
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Why does this iterative list-growing code give IndexError: list assignment index out of range?
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j is an empty list, but you're attempting to write to element [0] in the first iteration, which doesn't exist yet.
Try the following instead, to add a new element to the end of the list:
for l in i:
j.append(l)
Of course, you'd never do this in practice if al...