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Filtering DataGridView without changing datasource
... is your data source? My example assumes that you are using a DataTable. If you are using something else, check your casting. "as DataTable" in my example.
– Brad Bruce
Jan 25 '18 at 1:22
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Writing a pandas DataFrame to CSV file
...the sep argument of to_csv:
df.to_csv(file_name, sep='\t')
To use a specific encoding (e.g. 'utf-8') use the encoding argument:
df.to_csv(file_name, sep='\t', encoding='utf-8')
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How to check if element exists using a lambda expression?
Specifically, I have TabPane, and I would like to know if there is element with specific ID in it.
3 Answers
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Hashset vs Treeset
...t.
It's quite safe to accept default load factor but you may want to specify an initial capacity that's about twice the size to which you expect the set to grow.
TreeSet
guarantees log(n) time cost for the basic operations (add, remove and contains)
guarantees that elements of set will be sor...
XmlSerializer giving FileNotFoundException at constructor
...mal behaviour. An exception is thrown but handled by the XmlSerializer, so if you just ignore it everything should continue on fine.
I have found this very annoying, and there have been many complaints about this if you search around a bit, but from what I've read Microsoft don't plan on doing anyt...
What is the difference between pluck and collect in Rails?
...ill only query the particular field. See this.
When you do:
User.first.gifts.collect(&:id)
You have objects with all fields loaded and you simply get the id thanks to the method based on Enumerable.
So:
if you only need the id with Rails 4, use ids: User.first.gifts.ids
if you only need ...
Does MS SQL Server's “between” include the range boundaries?
...ETWEEN operator is inclusive.
From Books Online:
BETWEEN returns TRUE if the value of
test_expression is greater than or
equal to the value of begin_expression
and less than or equal to the value of
end_expression.
DateTime Caveat
NB: With DateTimes you have to be careful; if only a ...
Insert text into textarea with jQuery
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How about if the result is coming from a PHP page and handled by jQuery? (in between data is transmitted using Json)
– Abu Rayane
Apr 1 '16 at 6:31
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How do I get the file extension of a file in Java?
...n from Apache Commons IO
Here is an example of how to use it (you may specify either full path or just file name):
String ext1 = FilenameUtils.getExtension("/path/to/file/foo.txt"); // returns "txt"
String ext2 = FilenameUtils.getExtension("bar.exe"); // returns "exe"
Maven dependency:
<depe...
How to convert/parse from String to char in java?
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If your string contains exactly one character the simplest way to convert it to a character is probably to call the charAt method:
char c = s.charAt(0);
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