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From ND to 1D arrays
...tten() is way slower, as it needs to make a copy.
– BallpointBen
Aug 29 '18 at 22:52
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What is the most efficient way to create a dictionary of two pandas Dataframe columns?
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I found a faster way to solve the problem, at least on realistically large datasets using:
df.set_index(KEY).to_dict()[VALUE]
Proof on 50,000 rows:
df = pd.DataFrame(np.random.randint(32, 120, 100000).reshape(50000,2),columns=list('AB'))
df['A'] = df['A'].apply(chr)
%timeit dict(zip(df...
Calculate a Running Total in SQL Server
Imagine the following table (called TestTable ):
15 Answers
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How to print a date in a regular format?
...do with that?
Well, when you manipulate dates, keep using the date objects all long the way. They got thousand of useful methods and most of the Python API expect dates to be objects.
When you want to display them, just use str(). In Python, the good practice is to explicitly cast everything. So jus...
How to define a two-dimensional array?
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You're technically trying to index an uninitialized array. You have to first initialize the outer list with lists before adding items; Python calls this
"list comprehension".
# Creates a list containing 5 lists, each of 8 items, all set t...
A weighted version of random.choice
..., this is an order of magnitude slower than random.choices for individual calls. If you need a lot of random results, it's really important to pick them all at once by adjusting number_of_items_to_pick. If you do so, it's an order of magnitude faster.
– jpmc26
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Is there a way to define a min and max value for EditText in Android?
...Filters(new InputFilter[]{ new InputFilterMinMax("1", "12")});
This will allow user to enter values from 1 to 12 only.
EDIT :
Set your edittext with android:inputType="number".
You can find more details at https://www.techcompose.com/how-to-set-minimum-and-maximum-value-in-edittext-in-android-a...
What is the idiomatic Go equivalent of C's ternary operator?
...o read them quickly enough, this is not a universal truth, and things go really south when people start nesting them. "This other language has it" is NOT a valid argument to add a language feature.
– cthulhu
Aug 13 at 14:47
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Printing Lists as Tabular Data
...l for building data-centric CLI tools. That, combined with click (pip install click), and you've got a real stew going.
– alexbw
Nov 23 '14 at 20:53
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How to display an unordered list in two columns?
... displays 3 columns
}
ul{
list-style-type: disc;
}
This should solve all your problems with displaying columns. All the best and thanks @jaider as your response helped to guide me to discover this.
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