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How to run a program without an operating system?

How do you run a program all by itself without an operating system running? Can you create assembly programs that the computer can load and run at startup, e.g. boot the computer from a flash drive and it runs the program that is on the CPU? ...
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How do I filter query objects by date range in Django?

...year='2011', date__month='01') Edit As Bernhard Vallant said, if you want a queryset which excludes the specified range ends you should consider his solution, which utilizes gt/lt (greater-than/less-than). ...
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What is the canonical way to check for errors using the CUDA runtime API?

...ag wiki , I see it is often suggested that the return status of every API call should checked for errors. The API documentation contains functions like cudaGetLastError , cudaPeekAtLastError , and cudaGetErrorString , but what is the best way to put these together to reliably catch and report err...
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How do I parse an ISO 8601-formatted date?

... Pypi name is python-dateutil, not dateutil (thanks code3monk3y): pip install python-dateutil If you're using Python 3.7, have a look at this answer about datetime.datetime.fromisoformat. share | ...
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How to check if the string is empty?

... s.strip() allocates a new string, which is pure waste. Use string.isspace() – Clément Jun 22 at 15:27 add a ...
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Serializing object that contains cyclic object value

...e will come here for is debugging their circular objects and there's not really a great way to do that without pulling in a bunch of code, here goes. One feature that's not as well-known as JSON.stringify() is console.table(). Simply call console.table(whatever);, and it will log the variable in the...
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In Intellij, how do I toggle between camel case and underscore spaced?

... I use a plugin called String Manipulation which has the capabilities you're looking for (and more). Select historyOfPresentIllness and press Alt+M to bring up the plugin menu, then press: 5 - To snake_case (or to camelCase) which convert...
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JavaScript hashmap equivalent

... Hash your objects yourself manually, and use the resulting strings as keys for a regular JavaScript dictionary. After all, you are in the best position to know what makes your objects unique. That's what I do. Example: var key = function(obj){ // Some un...
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What is the proper way to re-attach detached objects in Hibernate?

...e to the DB, and overwrite any intervening updates. refresh() cannot be called on a detached entity. lock() cannot be called on a detached entity, and even if it could, and it did reattach the entity, calling 'lock' with argument 'LockMode.NONE' implying that you are locking, but not locking, i...
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Get the client IP address using PHP [duplicate]

... I usually don't like nested ternaries, but I really like it in this case... – Charles Harmon Jul 18 '14 at 20:49 ...