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How does Bluebird's util.toFastProperties function make an object's properties “fast”?
...e demo that demonstrates the speed difference. Here we use the delete statement to force the objects into slow dictionary mode.
The engine tries to use fast mode whenever possible and generally whenever a lot of property access is performed - however sometimes it gets thrown into dictionary mode. Be...
How to overcome TypeError: unhashable type: 'list'
...ensures that the file is properly closed when you're done
with open('filename.txt', 'rb') as f:
d = {}
# Here we use readlines() to split the file into a list where each element is a line
for line in f.readlines():
# Now we split the file on `x`, since the part before the x will be
# t...
Is there a way to instantiate objects from a string holding their class name?
...
Nope, there is none, unless you do the mapping yourself. C++ has no mechanism to create objects whose types are determined at runtime. You can use a map to do that mapping yourself, though:
template<typename T> Base * createInstance() { return new T; }
typedef std::map<std::string,...
Version vs build in Xcode
...on target form with fields: identifier, version, build, devices, and deployment target. The version field is blank and the build field is 3.4.0 (which matches the version of the app from when I was still editing with Xcode 3).
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Does setting Java objects to null do anything anymore?
I was browsing some old books and found a copy of "Practical Java" by Peter Hagger. In the performance section, there is a recommendation to set object references to null when no longer needed.
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How do I set cell value to Date and apply default Excel date format?
I've been using Apache POI for some time to read existing Excel 2003 files programmatically. Now I have a new requirement to create entire .xls files in-memory (still using Apache POI) and then write them to a file at the end. The only problem standing in my way is the handling of cells with dates.
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ASP.NET MVC ambiguous action methods
I have two action methods that are conflicting. Basically, I want to be able to get to the same view using two different routes, either by an item's ID or by the item's name and its parent's (items can have the same name across different parents). A search term can be used to filter the list.
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File Upload ASP.NET MVC 3.0
...form which would contain a file input:
@using (Html.BeginForm("Index", "Home", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<input type="file" name="file" />
<input type="submit" value="OK" />
}
and then you would have a controller to handle the upload:
public...
Why can't I use Docker CMD multiple times to run multiple services?
I have built a base image from Dockerfile named centos+ssh. In centos+ssh's Dockerfile, I use CMD to run ssh service.
5 Ans...
What are the minimum margins most printers can handle?
...ide with lots of graphics so maximizing real estate is a must but at the same time ensuring users printers can handle the tight margins is a must.
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