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Python Pandas: Get index of rows which column matches certain value
...BoolCol", we want to find the indexes of the DataFrame in which the values for "BoolCol" == True
6 Answers
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How do I concatenate or merge arrays in Swift?
...elligence extends to determining whether the b part of a is modified (therefore possibly eliding a copy of b during a.appendContentsOf(b))?
– Ephemera
Sep 20 '15 at 7:34
1
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Check if OneToOneField is None in Django
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Thank you for this solution. Unfortunately, this doesn't work all the time. In case you want to work with select_related() now or in the future -- or maybe even to be sure you also handle other sorts of magic which may happen elsewhere...
How can I get the current screen orientation?
...s the rotation with reference to the display's "natural" orientation, i.e. for a tablet it would return Surface.ROTATION_0 in landscape mode, whereas for a mobile phone it would return the same value for portrait.
– Zoltán
Apr 30 '12 at 8:40
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How can I listen for a click-and-hold in jQuery?
...o fire an event when a user clicks on a button, then holds that click down for 1000 to 1500 ms.
8 Answers
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Convert a row of a data frame to vector
...he one-row data frame to a numeric vector without dropping the names. Therefore unname(unlist(df[1,])) is another, slightly more explicit way to get to the same result.
As @Josh comments below, if you have a not-completely-numeric (alphabetic, factor, mixed ...) data frame, you need as.character(df...
Rails check if yield :area is defined in content_for
...ring at the layout level based on the actual template has defined content_for(:an__area) , any idea how to get this done?
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How to find the operating system version using JavaScript?
...s using
console.log(navigator);
You'll see something like this
# platform = Win32
# appCodeName = Mozilla
# appName = Netscape
# appVersion = 5.0 (Windows; en-US)
# language = en-US
# mimeTypes = [object MimeTypeArray]
# oscpu = Windows NT 5.1
# vendor = Firefox
# vendorSub = 1.0.7
# product =...
What's wrong with using $_REQUEST[]?
...OST in a combined way. In fact that's what you almost always want to do:
for a plain idempotent request usually submitted via GET, there's the possibility the amount of data you want won't fit in a URL so it has be mutated to a POST request instead as a practical matter.
for a request that has a r...
How to use the IEqualityComparer
...ontract you’re supposed to implement.1
In your code, the solution is to forward GetHashCode to Class_reglement.Numf.GetHashCode and implement it appropriately there.
Apart from that, your Equals method is full of unnecessary code. It could be rewritten as follows (same semantics, ¼ of the code,...