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How to check if a column exists in Pandas
Is there a way to check if a column exists in a Pandas DataFrame?
3 Answers
3
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Rails nested form with has_many :through, how to edit attributes of join model?
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Rails 3 update: the form_for and field_for need <%= %> instead of <% %> if you're using Rails 3.
– Arcolye
Sep 29 '10 at 16:09
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How to pass parameters in GET requests with jQuery
... option of ajax. You can send data object to server by data option in ajax and the type which defines how you are sending it (either POST or GET). The default type is GET method
Try this
$.ajax({
url: "ajax.aspx",
type: "get", //send it through get method
data: {
ajaxid: 4,
UserID:...
In Vim, how do I delete everything within the double quotes?
... things that work similar to " in this situation.
– Randy Morris
Jan 6 '11 at 21:38
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@funk-shun...
How can I add a third button to an Android Alert Dialog?
...can have one, two or three buttons, but the SDK only allows for a positive and negative button. How then can I add a third button?
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Pass variables to Ruby script via command line
I've installed RubyInstaller on Windows and I'm running IMAP Sync but I need to use it to sync hundreds of accounts. If I could pass these variables to it via command line I could automate the whole process better.
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Check if a class is derived from a generic class
...on avoids the unnecessary recursion performance hit also. It's an elegant and beautiful solution to a meta-generic question.
– EnocNRoll - AnandaGopal Pardue
Jan 19 '09 at 18:26
2...
Map to String in Java
...ame string representation of a Map in a variable without meddling with standard output? Something like String mapAsString = Collections.toString(map) ?
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Checking if all elements in a list are unique
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Not the most efficient, but straight forward and concise:
if len(x) > len(set(x)):
pass # do something
Probably won't make much of a difference for short lists.
share
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How to get the instance id from within an ec2 instance?
... 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_ZONE=...