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Add unique constraint to combination of two columns
I have a table and, somehow, the same person got into my Person table twice. Right now, the primary key is just an autonumber but there are two other fields that exist that I want to force to be unique.
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Does Python support multithreading? Can it speed up execution time?
I'm slightly confused about whether multithreading works in Python or not.
3 Answers
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nodeValue vs innerHTML and textContent. How to choose?
I'm using plain js to alter the inner text of a label element, and I wasn't sure on what grounds I should use innerHTML or nodeValue or textContent. I don't need to create a new node or change the HTML elements or anything — just replace the text. Here's an example of the code:
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XPath to select multiple tags
Given this simplified data format:
4 Answers
4
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When serving JavaScript files, is it better to use the application/javascript or application/x-javas
The whole question fits in the title. And to add some context: I'm not asking what is the best according to what the specs are saying, but rather what works the best given the mix of browsers deployed nowadays.
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How do I write good/correct package __init__.py files
My package has the following structure:
3 Answers
3
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Can a Windows batch file determine its own file name?
Can a Windows batch file determine its own file name?
6 Answers
6
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Why is arr = [] faster than arr = new Array?
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Further expanding on previous answers...
From a general compilers perspective and disregarding VM-specific optimizations:
First, we go through the lexical analysis phase where we tokenize the code.
By way of example, the following tokens may be produced:
[]: ARRAY_I...
Could not insert new outlet connection [duplicate]
Could not insert new outlet connection: Could not find any information for the class and not showing any class named "ViewController"
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Backbone.View “el” confusion
...ire events you need to do your rendering work on the el. A views el is a DOM element but it does not have to be a pre-existing element. It will be created if you do not pull one from your current page, but you will have to insert it into the page if you ever want to see it do anything.
An example:
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