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Use of .apply() with 'new' operator. Is this possible?
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small fix : instead of [null,arr] - [null].concat(arr)
– Royi Namir
Mar 11 '14 at 7:57
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Is there a MySQL option/feature to track history of changes to records?
...i AFTER INSERT ON MyDB.data FOR EACH ROW
INSERT INTO MyDB.data_history SELECT 'insert', NULL, NOW(), d.*
FROM MyDB.data AS d WHERE d.primary_key_column = NEW.primary_key_column;
CREATE TRIGGER MyDB.data__au AFTER UPDATE ON MyDB.data FOR EACH ROW
INSERT INTO MyDB.data_history SELECT 'up...
How can I filter lines on load in Pandas read_csv function?
... read_csv. However, read_csv returns a DataFrame, which can be filtered by selecting rows by boolean vector df[bool_vec]:
filtered = df[(df['timestamp'] > targettime)]
This is selecting all rows in df (assuming df is any DataFrame, such as the result of a read_csv call, that at least contains ...
Why does the JavaScript need to start with “;”?
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I would say since scripts are often concatenated and minified/compressed/sent together there's a chance the last guy had something like:
return {
'var':'value'
}
at the end of the last script without a ; on the end. If you have a ; at the start on yours,...
How can I convert comma separated string into a List
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Here is one way of doing it:
List<int> TagIds = tags.Split(',').Select(int.Parse).ToList();
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How to select between brackets (or quotes or …) in Vim?
...Computed solution coefficients:
As CMS noted, this works for visual mode selection as well - just use vi), vi}, vi', etc.
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Exact difference between CharSequence and String in java [duplicate]
...SR 378 again…
Using "one-dimensional" string literals.
String query = "SELECT \"EMP_ID\", \"LAST_NAME\" FROM \"EMPLOYEE_TB\"\n" +
"WHERE \"CITY\" = 'INDIANAPOLIS'\n" +
"ORDER BY \"EMP_ID\", \"LAST_NAME\";\n";
Using a "two-dimensional" block of text
String query =...
Can I have multiple primary keys in a single table?
...hese practices, but there is nothing in the relational model that requires selecting a primary key among the candidate keys.
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GetProperties() to return all properties for an interface inheritance hierarchy
...(new Type[] { type })
.Concat(type.GetInterfaces())
.SelectMany(i => i.GetProperties());
}
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How do I sort unicode strings alphabetically in Python?
...just wanted to point out one coding inefficiency in Human Sort. To apply a selective char-by-char translation to a unicode string s, it uses the code:
spec_dict = {'Å':'A', 'Ä':'A'}
def spec_order(s):
return ''.join([spec_dict.get(ch, ch) for ch in s])
Python has a much better, faster and ...