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Ruby replace string with captured regex pattern
...nce you only seem to be interested in the capture group, note that you can index a string with a regex:
"foo"[/oo/]
#=> "oo"
"Z_123: foobar"[/^Z_.*(?=:)/]
#=> "Z_123"
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Why is Go so slow (compared to Java)?
...n spends runtime supporting language features that the benchmark doesn't really need. In most compiled languages a sufficiently clever compiler could in theory strip out what isn't needed, but there comes a point where you're rigging the demo, since very few real users of the language would write pr...
Dynamically access object property using variable
...ike than array like. You can't iterate the 'associative' version by simple index so it is not displaying array-like behaviour. You can define your 'associative' array as {} or [] and treat it the same in either case as far as random property access is concerned.
– Vanquished Wo...
How can I return two values from a function in Python?
...y name, which is more readable. You can still access items of the tuple by index. For example in Schema.loads method Marshmallow framework returns a UnmarshalResult which is a namedtuple. So you can do:
data, errors = MySchema.loads(request.json())
if errors:
...
or
result = MySchema.loads(r...
Find maximum value of a column and return the corresponding row values using Pandas
...
Assuming df has a unique index, this gives the row with the maximum value:
In [34]: df.loc[df['Value'].idxmax()]
Out[34]:
Country US
Place Kansas
Value 894
Name: 7
Note that idxmax returns index labels. So if the DataFrame has...
Understanding the map function
... can make you a new list that holds the addition of elements at a specific index.
Now remember map(), needs a function. This time we'll use the builtin sum() function. Running map() gives the following result:
>>> map(sum, list_one, list_two, list_three)
[33, 36, 39, 42, 45]
REMEMBER:
I...
How to easily map c++ enums to strings
...(eValue1, "A")(eValue2, "B")... (boost.org/doc/libs/1_35_0/libs/assign/doc/index.html)
– Johannes Schaub - litb
Mar 5 '09 at 2:13
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How to open a new tab using Selenium WebDriver?
...iver.switchTo().window(tabs.get(1));
Will control on tab as according to index:
driver.switchTo().window(tabs.get(1));
Driver control on main tab:
driver.switchTo().window(tabs.get(0));
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Dropping Unique constraint from MySQL table
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A unique constraint is also an index.
First use SHOW INDEX FROM tbl_name to find out the name of the index. The name of the index is stored in the column called key_name in the results of that query.
Then you can use DROP INDEX:
DROP INDEX index_name O...
Remap values in pandas column with a dict
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map also works on an index where I couldn't figure out a way to do that with replace
– Max Ghenis
Mar 15 '19 at 16:42
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