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“using namespace” in c++ headers
...ead, explicitly namespace-qualify all names.
A header file is a guest in one or more source files. A header file that includes using directives and declarations brings its rowdy buddies over too.
A using declaration brings in one buddy. A using directive brings in all the buddies in the namespac...
How to determine whether a Pandas Column contains a particular value
... object
In [13]: 1 in s
Out[13]: True
In [14]: 'a' in s
Out[14]: False
One option is to see if it's in unique values:
In [21]: s.unique()
Out[21]: array(['a', 'b', 'c'], dtype=object)
In [22]: 'a' in s.unique()
Out[22]: True
or a python set:
In [23]: set(s)
Out[23]: {'a', 'b', 'c'}
In [24]...
Best practices for exception management in Java or C# [closed]
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As for why someone would want error codes instead of exceptions... I always thought it was weird that HTTP still uses error codes, even though my application is generating an exception. Why can't HTTP let me pass the exception through as-is...
Best way to get identity of inserted row?
...above aren't quite what you need (very rare). Also, as @Guy Starbuck mentioned, "You could use this if you want to get the current IDENTITY value for a table that you have not inserted a record into."
The OUTPUT clause of the INSERT statement will let you access every row that was inserted via that...
Capture HTML Canvas as gif/jpg/png/pdf?
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one more question, how can I save the image I got in this tag to server. Any guess??
– Surya
Jun 27 '11 at 8:41
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Could not load file or assembly 'Newtonsoft.Json, Version=4.5.0.0, Culture=neutral, PublicKeyToken=3
...
For the sake of everyone reading this: I've done that and still got the error. Then I solved it somehow: Amazingly, I had to delete Json.Net's <dependentAssembly> section from my .config file. Reinstall brings it back if it's not there and ...
How to get the instance id from within an ec2 instance?
...mple of a more advanced use (retrieve instance ID as well as availability zone and region, etc.):
EC2_INSTANCE_ID="`wget -q -O - http://169.254.169.254/latest/meta-data/instance-id || die \"wget instance-id has failed: $?\"`"
test -n "$EC2_INSTANCE_ID" || die 'cannot obtain instance-id'
EC2_AVAIL_Z...
jQuery scroll() detect when user stops scrolling
...uery's default on-event-handler. It attaches an event handler function for one or more events to the selected elements and calls the handler function if the event was not triggered for a given interval. This is useful if you want to fire a callback only after a delay, like the resize event, or such....
How to convert a PIL Image into a numpy array?
... im2arr.shape: height x width x channel
arr2im = Image.fromarray(im2arr)
One thing that needs noticing is that Pillow-style im is column-major while numpy-style im2arr is row-major. However, the function Image.fromarray already takes this into consideration. That is, arr2im.size == im.size and arr...
How can I deserialize JSON to a simple Dictionary in ASP.NET?
...s on this page with a very messy key/value pair, and JSON.NET was the only one that I tried that worked.
– bnieland
Mar 26 '14 at 14:24
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