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Possible to iterate backwards through a foreach?
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When working with a list (direct indexing), you cannot do it as efficiently as using a for loop.
Edit: Which generally means, when you are able to use a for loop, it's likely the correct method for this task. Plus, for as much as foreach is implemented in-o...
Find and replace in file and overwrite file doesn't work, it empties the file
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When the shell sees > index.html in the command line it opens the file index.html for writing, wiping off all its previous contents.
To fix this you need to pass the -i option to sed to make the changes inline and create a backup of the original ...
How to sort two lists (which reference each other) in the exact same way
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The sorted index/map paradigm suggested by J.F. Sebastian is about 10% faster than either zip solution for me (using lists of 10000 random ints): %timeit index = range(len(l1)); index.sort(key=l1.__getitem__); map(l1.__getitem__, index...
How to parse/format dates with LocalDateTime? (Java 8)
... Don't forget the uppercase on MM
– Wesos de Queso
Jun 25 '17 at 3:50
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show 1 more comment
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Case insensitive searching in Oracle
...T_MATCH
2 FROM DUAL;
1
You can also create case insensitive indexes:
create index
nlsci1_gen_person
on
MY_PERSON
(NLSSORT
(PERSON_LAST_NAME, 'NLS_SORT=BINARY_CI')
)
;
This information was taken from Oracle case insensitive searches. The article mentions REGEXP_LIK...
Open new Terminal Tab from command line (Mac OS X)
...te that if the path is coming from a variable, you'll need to use a double-quoted string instead of single-quoted, and escape the inner quoted string, and probably the path itself.
– Gordon Davisson
Dec 23 '18 at 6:02
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conditional unique constraint
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Behold, the filtered index. From the documentation (emphasis mine):
A filtered index is an optimized nonclustered index especially suited to cover queries that select from a well-defined subset of data. It uses a filter predicate to index a p...
Javascript: formatting a rounded number to N decimals
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PHP-Like rounding Method
The code below can be used to add your own version of Math.round to your own namespace which takes a precision parameter. Unlike Decimal rounding in the example above, this performs no conversion to ...
How do I iterate through each element in an n-dimensional matrix in MATLAB?
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You can use linear indexing to access each element.
for idx = 1:numel(array)
element = array(idx)
....
end
This is useful if you don't need to know what i,j,k, you are at. However, if you don't need to know what index you are at, yo...
Find the most common element in a list
...for an item
def _auxfun(g):
item, iterable = g
count = 0
min_index = len(L)
for _, where in iterable:
count += 1
min_index = min(min_index, where)
# print 'item %r, count %r, minind %r' % (item, count, min_index)
return count, -min_index
# pick the highest-cou...