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how to POST/Submit an Input Checkbox that is disabled?
... specifically set the value of readonly to readonly, i.e.: <input name="foo" value="bar" readonly="readonly" />
– Matt Huggins
Jan 18 '11 at 19:20
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Is it safe to get values from a java.util.HashMap from multiple threads (no modification)?
There is a case where a map will be constructed, and once it is initialized, it will never be modified again. It will however, be accessed (via get(key) only) from multiple threads. Is it safe to use a java.util.HashMap in this way?
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Cluster analysis in R: determine the optimal number of clusters
Being a newbie in R, I'm not very sure how to choose the best number of clusters to do a k-means analysis. After plotting a subset of below data, how many clusters will be appropriate? How can I perform cluster dendro analysis?
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AWS S3: how do I see how much disk space is using
...separated by \ for easy reading here):
aws s3 ls s3://<bucket_name>/foo/bar | \
grep -v -E "(Bucket: |Prefix: |LastWriteTime|^$|--)" | \
awk 'BEGIN {total=0}{total+=$3}END{print total/1024/1024" MB"}'
the aws part lists the bucket (or optionally a 'sub-folder')
the grep part removes (using...
How do getters and setters work?
... only thing that makes them getters or setters is convention. A getter for foo is called getFoo and the setter is called setFoo. In the case of a boolean, the getter is called isFoo. They also must have a specific declaration as shown in this example of a getter and setter for 'name':
class Dummy
{...
Creating an index on a table variable
Can you create an index on a table variable in SQL Server 2000?
3 Answers
3
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Create singleton using GCD's dispatch_once in Objective-C
...ere can only ever be 1 of these objects), but as long as you only use the [Foo sharedFoo] method to access the object, this is good enough.
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Query an XDocument for elements by name at any depth
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@DrorHarari Nope, no exception is thrown: Try out var foo = new XDocument().Descendants("Bar").Descendants("Baz"); Because Descendants returns an empty IEnumerable<XElement>and not null.
– DareDude
Jul 24 '16 at 17:24
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ValueError : I/O operation on closed file
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Same error can raise by mixing: tabs + spaces.
with open('/foo', 'w') as f:
(spaces OR tab) print f <-- success
(spaces AND tab) print f <-- fail
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Filter dict to contain only certain keys?
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Slightly more elegant dict comprehension:
foodict = {k: v for k, v in mydict.items() if k.startswith('foo')}
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