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What is a Context Free Grammar?
... certain properties. In computer science, grammars describe languages; specifically, they describe formal languages.
A formal language is just a set (mathematical term for a collection of objects) of strings (sequences of symbols... very similar to the programming usage of the word "string"). A sim...
What exceptions should be thrown for invalid or unexpected parameters in .NET?
... message. What they don’t do well is that they don’t tell you, why specifically it failed.
Thanks to STW (ex Yoooder) again for the comments.
In response to your followup, I would throw an ArgumentOutOfRangeException. Look at what MSDN says about this exception:
ArgumentOutOfRangeExcepti...
Best way of invoking getter by reflection
I need to get the value of a field with a specific annotation, So with reflection I am able to get this Field Object. The problem is that this field will be always private though I know in advance it will always have a getter method. I know that I can use setAccesible(true) and get its value (when t...
When writing a directive in AngularJS, how do I decide if I need no new scope, a new child scope, or
...no new scope at all
I don't use this very often, but as @MarkRajcok said, if the directive doesn't access any scope variables (and obviously doesn't set any!) then this is just fine as far as I am concerned. This is also helpful for child directives that are only used in the context of the parent d...
Difference between RegisterStartupScript and RegisterClientScriptBlock?
Is the only difference between the RegisterStartupScript and the RegisterClientScriptBlock is that RegisterStartupScript puts the javascript before the closing </form> tag of the page and RegisterClientScriptBlock puts it right after the starting <form> tag of the page?
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Where should virtualenvs be created?
...the project itself, since you don't want to distribute it (it might be specific to your computer or operating system). Instead, keep a requirements.txt file using pip:
pip freeze > requirements.txt
and distribute that. This will allow others using your project to reinstall all the same require...
Truncate a string straight JavaScript
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If you want a substring starting from 0, then the substr function will do the exact same thing with 3 less chars ;)
– jackocnr
Sep 21 '14 at 18:55
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Is there a more elegant way of adding an item to a Dictionary safely?
... add key/object pairs to a dictionary, but I of course need to first check if the key already exists otherwise I get a " key already exists in dictionary " error. The code below solves this but is clunky.
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How do I add a path to PYTHONPATH in virtualenv
... Unfortunately this does not work as an override. It appends the path, so if you're developing it doesn't work.
– Erik Aronesty
Aug 29 '18 at 21:34
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Is there a cross-browser onload event when clicking the back button?
... This is because the browser assumes the page is uncacheable if it has a onunload handler (the page has already destroyed everything; why cache it?).
– Casey Chu
May 10 '10 at 7:13
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