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Regular expression for a hexadecimal number?
...wing?
0[xX][0-9a-fA-F]+
Matches expression starting with a 0, following by either a lower or uppercase x, followed by one or more characters in the ranges 0-9, or a-f, or A-F
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Block commenting in Ruby
Does Ruby have block comments?
4 Answers
4
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Get generic type of class at runtime
...ot working in all cases like stateless remote beans which are instantiated by container/reflection.
– djmj
Dec 10 '14 at 10:24
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git add . vs git commit -a
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By using the git commit -a switch with the commit command to automatically "add" changes from all known files (i.e. all files that are already listed in the index)
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What is the usefulness of `enable_shared_from_this`?
...read "Constructing a std::shared_ptr for an object that is already managed by another std::shared_ptr will not consult the internally stored weak reference and thus will lead to undefined behavior." (en.cppreference.com/w/cpp/memory/enable_shared_from_this)
– Thorbjørn Lindeij...
How are 3D games so efficient? [closed]
...ast local memory so can blaze through the data but you need to help it out by organising your data correctly.
Avoid doing lots of renderstate switches ( again batch similar vertex data together ) as this causes the GPU to stall
Swizzle your textures and ensure they are powers of two - this improve...
Compiling dynamic HTML strings from database
Nested within our Angular app is a directive called Page, backed by a controller, which contains a div with an ng-bind-html-unsafe attribute. This is assigned to a $scope var called 'pageContent'. This var gets assigned dynamically generated HTML from a database. When the user flips to the next page...
Importing modules from parent folder
...a package, i.e., you must have an init.py file.
– kirbyfan64sos
Oct 17 '13 at 21:59
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Python argparse: default value or specified value
...rentiation of "" (empty string as default) and "" (empty string as entered by user). In the code for now I'm using the default and since I need to do some ops, I have something like this self.foo = (args.bar or some_else_source).upper(). It will break on None object AFAIUC.
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Checking if form has been submitted - PHP
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That's true; it can also check any variable posted by AJAX.
– Tzshand
Jun 7 '17 at 22:00
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