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Does SQLAlchemy have an equivalent of Django's get_or_create?

I want to get an object from the database if it already exists (based on provided parameters) or create it if it does not. ...
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Inputting a default image in case the src attribute of an html is not valid?

...ing only HTML)? If not, what would be your lightweight way to work around it? 22 Answers ...
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Generating Random Passwords

When a user on our site loses his password and heads off to the Lost Password page we need to give him a new temporary password. I don't really mind how random this is, or if it matches all the "needed" strong password rules, all I want to do is give them a password that they can change later. ...
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What is a “callable”?

Now that it's clear what a metaclass is , there is an associated concept that I use all the time without knowing what it really means. ...
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How to model type-safe enum types?

...follow | edited Mar 14 '14 at 16:18 qtwo 45744 silver badges99 bronze badges answered Aug...
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Cloning an Object in Node.js

... Possibility 1 Low-frills deep copy: var obj2 = JSON.parse(JSON.stringify(obj1)); Possibility 2 (deprecated) Attention: This solution is now marked as deprecated in the documentation of Node.js: The util._extend() method was never i...
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Why do we use __init__ in Python classes?

I am having trouble understanding the Initialization of classes. 8 Answers 8 ...
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How to remove all namespaces from XML with C#?

... answer. I have used great Jimmy idea (which unfortunately is not complete itself) and complete recursion function to work properly. Based on interface: string RemoveAllNamespaces(string xmlDocument); I represent here final clean and universal C# solution for removing XML namespaces: //Implemen...
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What is a mutex?

...equently used to solve multi-threading problems. My question to the community: 10 Answers ...
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Why does my JavaScript code receive a “No 'Access-Control-Allow-Origin' header is present on the req

... If I understood it right you are doing an XMLHttpRequest to a different domain than your page is on. So the browser is blocking it as it usually allows a request in the same origin for security reasons. You need to do something different whe...