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Should the hash code of null always be zero, in .NET
Given that collections like System.Collections.Generic.HashSet<> accept null as a set member, one can ask what the hash code of null should be. It looks like the framework uses 0 :
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How do I get a list of column names from a psycopg2 cursor?
I would like a general way to generate column labels directly from the selected column names, and recall seeing that python's psycopg2 module supports this feature.
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How to remove “disabled” attribute using jQuery?
I have to disable inputs at first and then on click of a link to enable them.
10 Answers
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What is the difference between tree depth and height?
This is a simple question from algorithms theory.
The difference between them is that in one case you count number of nodes and in other number of edges on the shortest path between root and concrete node.
Which is which?
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Best way to pretty print a hash
I have a large hash with nested arrays and hashes. I would like to simply print it out so it 'readable' to the user.
12 An...
How should I use try-with-resources with JDBC?
I have a method for getting users from a database with JDBC:
5 Answers
5
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jQuery delete all table rows except first
Using jQuery, how do I delete all rows in a table except the first? This is my first attempt at using index selectors. If I understand the examples correctly, the following should work:
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Can HTML checkboxes be set to readonly?
I thought they could be, but as I'm not putting my money where my mouth was (so to speak) setting the readonly attribute doesn't actually seem to do anything.
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Stop Chrome Caching My JS Files
I will make a change to my JS files but it won't really change in the browser, I have to rename the files every time so that it reloads it. Is there some sort of .htaccess command I can add or something to make it stop caching?
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Check if database exists in PostgreSQL using shell
I was wondering if anyone would be able to tell me about whether it is possible to use shell to check if a PostgreSQL database exists?
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