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What is a mixin, and why are they useful?
...guages also tend to allow partial inclusion of the mixin class (things are starting to sound a bit like aspects now).
– Trevor
May 9 '13 at 20:09
9
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What does the `forall` keyword in Haskell/GHC do?
...
Let's start with a code example:
foob :: forall a b. (b -> b) -> b -> (a -> b) -> Maybe a -> b
foob postProcess onNothin onJust mval =
postProcess val
where
val :: b
val = maybe onNothin o...
Selenium wait until document is ready
...ait if you like, I find them ugly):
def wait_for(condition_function):
start_time = time.time()
while time.time() < start_time + 3:
if condition_function():
return True
else:
time.sleep(0.1)
raise Exception('Timeout waiting for {}'.format(condit...
ASP.NET MVC: No parameterless constructor defined for this object
...have to create a parameterless one... I can understand that like: once you start defined a constructor, the system does not take the risk to create 'default objects' because it does not know if it makes sense... something like that.
– H_He
Jul 28 '14 at 11:52
...
How to check if a python module exists without importing it
...is not None
This also works with relative imports but you must supply the starting
package, so you could also do:
import importlib
spam_spec = importlib.util.find_spec("..spam", package="eggs.bar")
found = spam_spec is not None
spam_spec.name == "eggs.spam"
While I'm sure there exists a reason for...
How to set caret(cursor) position in contenteditable element (div)?
...cument.createRange()
var sel = window.getSelection()
range.setStart(el.childNodes[2], 5)
range.collapse(true)
sel.removeAllRanges()
sel.addRange(range)
}
<div id="editable" contenteditable="true">
text text text<br>text text text<br>text text text&l...
Permission denied on accessing host directory in Docker
...ere the host uid/gid may change per developer, my preferred solution is to start the container with an entrypoint running as root, fix the uid/gid of the user inside the container to match the host volume uid/gid, and then use gosu to drop from root to the container user to run the application insid...
Relational Database Design Patterns? [closed]
...n Color With UML provides an "archetype" driven process of entity modeling starting from the premise that there are 4 core archetypes of any object/data model
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What is the purpose of the Visual Studio Hosting Process?
...erver and ASP.NET. Hosting allows one to configure the CLR before it gets started. One primary use of this is configuring the primary AppDomain and setting up custom security policies. Which is exactly what the hosting process is doing.
A good example of a custom CLR host is available in this qu...
How can I time a code segment for testing performance with Pythons timeit?
...'''
def time_func(func, *args): #*args can take 0 or more
import time
start_time = time.time()
func(*args)
end_time = time.time()
print("it took this long to run: {}".format(end_time-start_time))
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