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Get list from pandas DataFrame column headers
...returns an array and this has a helper function .tolist to return a list.
If performance is not as important to you, Index objects define a .tolist() method that you can call directly:
my_dataframe.columns.tolist()
The difference in performance is obvious:
%timeit df.columns.tolist()
16.7 µs ...
How do you get a list of the names of all files present in a directory in Node.js?
...addirSync(testFolder).forEach(file => {
console.log(file);
});
The difference between the two methods, is that the first one is asynchronous, so you have to provide a callback function that will be executed when the read process ends.
The second is synchronous, it will return the file name a...
How to use a RELATIVE path with AuthUserFile in htaccess?
...lative paths for AuthUserFile:
File-path is the path to the user file. If it is not absolute (i.e., if it doesn't begin with a slash), it is treated as relative to the ServerRoot.
You have to accept and work around that limitation.
We're using IfDefine together with an apache2 command line ...
Python regular expressions return true/false
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Match objects are always true, and None is returned if there is no match. Just test for trueness.
if re.match(...):
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When do we need to set ProcessStartInfo.UseShellExecute to True?
If we spawn a new process, when do we need to set UseShellExecute to True?
5 Answers
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How do I clone a range of array elements to a new array?
...}
}
Update re cloning (which wasn't obvious in the original question). If you really want a deep clone; something like:
public static T[] SubArrayDeepClone<T>(this T[] data, int index, int length)
{
T[] arrCopy = new T[length];
Array.Copy(data, index, arrCopy, 0, length);
usin...
How to check if an object is a certain type
...ssing various objects to a subroutine to run the same process but using a different object each time. For example, in one case I am using a ListView and in another case I am passing a DropDownList.
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What is the difference between sites-enabled and sites-available directory?
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The difference is that virtual sites listed in the sites-enabled directory are served by apache. In the sites-available directory there are the virtual sites that exist on your server but people can't access them because they are ...
How do I check if an object has a key in JavaScript? [duplicate]
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Try the JavaScript in operator.
if ('key' in myObj)
And the inverse.
if (!('key' in myObj))
Be careful! The in operator matches all object keys, including those in the object's prototype chain.
Use myObj.hasOwnProperty('key') to check an object's own ...
How to check if a string starts with a specified string? [duplicate]
I'm trying to check if a string starts with http . How can I do this check?
6 Answers
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