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Select mySQL based only on month and year
... It is index friendly, but strtotime gives you int and you need to convert it to date for mysql first.
– piotrm
Feb 1 '12 at 23:26
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Is there a way to chain multiple value converters in XAML?
...y Silverlight project.
Here's my implementation of it:
public class ValueConverterGroup : List<IValueConverter>, IValueConverter
{
#region IValueConverter Members
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
...
Equals(=) vs. LIKE
...archar2. If you compare char with char. Before compare the database first convert the length of first 'variable' to the same of second. If you compare char and varchar2 the database will do nothing. docs.oracle.com/cd/A64702_01/doc/server.805/a58236/c_char.htm
– xild
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Converting many 'if else' statements to a cleaner approach [duplicate]
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You could have a Converter interface. Then you could create a class for each Mimetype like:
public interface Converter {
public void convertToMp3();
public void convertToOgg();
}
public class MpegConverter implements Converter {
...
How to add a new row to an empty numpy array
...it would be much faster to append to a list as in your first example, then convert to a numpy array at the end, since you're really not using numpy as intended during the loop:
In [210]: %%timeit
.....: l = []
.....: for i in xrange(1000):
.....: l.append([3*i+1,3*i+2,3*i+3])
.....:...
Sort a Map by values
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Java 8 offers a new answer: convert the entries into a stream, and use the comparator combinators from Map.Entry:
Stream<Map.Entry<K,V>> sorted =
map.entrySet().stream()
.sorted(Map.Entry.comparingByValue());
This will let you ...
Python class inherits object
...I am not 101% sure about this point (wether all builtin types were already converted to new-style classes when new-style classes were introduced) - I might just be plain wrong, or this might only have concerned some of the standard lib's (but not builtin) types. But yet I think it should be better t...
Remove duplicate rows in MySQL
...n the backup_employee table
⇒ Using this approach, 1.6M registers were converted into 6k in less than 200s.
Chetan, following this process, you could fast and easily remove all your duplicates and create a UNIQUE constraint by running:
CREATE TABLE tmp_jobs LIKE jobs;
ALTER TABLE tmp_jobs ADD...
Find element's index in pandas Series
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Converting to an Index, you can use get_loc
In [1]: myseries = pd.Series([1,4,0,7,5], index=[0,1,2,3,4])
In [3]: Index(myseries).get_loc(7)
Out[3]: 3
In [4]: Index(myseries).get_loc(10)
KeyError: 10
Duplicate handling
I...
Remove duplicate dict in list in Python
...is:
[dict(t) for t in {tuple(d.items()) for d in l}]
The strategy is to convert the list of dictionaries to a list of tuples where the tuples contain the items of the dictionary. Since the tuples can be hashed, you can remove duplicates using set (using a set comprehension here, older python alte...