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Frequency table for a single variable

... employrate, Length: 139, dtype: float64 putting classification we put all values with a certain range ie. 0-10 as 1, 11-20 as 2 21-30 as 3, and so forth. gm["employrate"]=gm["employrate"].str.strip().dropna() gm["employrate"]=pd.to_numeric(gm["employrate"]) gm['employrate'] = np.where( ...
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Mongod complains that there is no /data/db folder

...ere you can create the data directory in another location, but that's generally not a good idea, because it just slightly complicates things such as DB recovery, because you always have to specify the db-path manually. I wouldn't recommend doing that. Edit: the error message you're getting is ...
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iOS5 Storyboard error: Storyboards are unavailable on iOS 4.3 and prior

I've built a small app using storyboards and it ran great. Just before final testing I decided to try it out to see if it runs on iOS 4.3. I clicked on the gray 5.0 in the project settings and selected 4.3. ...
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How to handle command-line arguments in PowerShell

...ase" ) ) Inside the script you can simply write-output $server since all parameters become variables available in script scope. In this example, the $server gets a default value if the script is called without it, script stops if you omit the -username parameter and asks for terminal input if...
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How to iterate over associative arrays in Bash

... This is now if assign all keys to an array: array=(${!hash[@]}) – Michael-O Jun 6 '13 at 10:54 12 ...
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What are “res” and “req” parameters in Express functions?

...red request.method, which will be "GET" in this case, hence the app.get() call. An array of HTTP headers in request.headers, containing items like request.headers.accept, which you can use to determine what kind of browser made the request, what sort of responses it can handle, whether or not it's a...
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How to check if string input is a number? [duplicate]

... This lets you accept things like 4.1 when technically only 4 is valid. It is also against the python mentality to have secret conversions like this happening and I would prefer to do strict checks at my public interface – Peter R Feb 1...
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Naming threads and thread-pools of ExecutorService

...ified, a Executors.defaultThreadFactory() is used, that creates threads to all be in the same ThreadGroup and with the same NORM_PRIORITY priority and non-daemon status. By supplying a different ThreadFactory, you can alter the thread's name, thread group, priority, daemon status, etc. If a ThreadFa...
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How can I split a shell command over multiple lines when using an IF statement?

...d from the comments: the line-continuation backslash in the shell is not really a special case; it is simply an instance of the general rule that a backslash "quotes" the immediately-following character, preventing any special treatment it would normally be subject to. In this case, the next charact...
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How do I drop a foreign key constraint only if it exists in sql server?

... its the if exists bit i am really after.. sorry. i'll update my question so it's more clear! – solrevdev Jan 27 '09 at 10:30 2 ...