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Removing duplicates from a list of lists
...le):
return map(list, set(map(tuple, k)))
def dosort(k, sorted=sorted, xrange=xrange, len=len):
ks = sorted(k)
return [ks[i] for i in xrange(len(ks)) if i == 0 or ks[i] != ks[i-1]]
def dogroupby(k, sorted=sorted, groupby=itertools.groupby, list=list):
ks = sorted(k)
return [i for i, _ in...
Pretty-print C++ STL containers
... times, and we have decided to call the main class that wraps a collection RangePrinter
This should work automatically with any collection once you have written the one-time operator<< overload, except that you will need a special one for maps to print the pair, and may want to customise the ...
Using `textField:shouldChangeCharactersInRange:`, how do I get the text including the current typed
...
-shouldChangeCharactersInRange gets called before text field actually changes its text, that's why you're getting old text value. To get the text after update use:
[textField2 setText:[textField1.text stringByReplacingCharactersInRange:range withStr...
Recursive sub folder search and return files in a list python
...er>"
RUNS = 20
def run_os_walk():
a = time.time_ns()
for i in range(RUNS):
fu = [os.path.join(dp, f) for dp, dn, filenames in os.walk(directory) for f in filenames if
os.path.splitext(f)[1].lower() == '.jpg']
print(f"os.walk\t\t\ttook {(time.time_ns() - a) ...
Lambda function in list comprehensions
... To make it equivalent to the first you need:
[(lambda x: x*x)(x) for x in range(10)]
Or better yet:
[x*x for x in range(10)]
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Are list-comprehensions and functional functions faster than “for loops”?
...ode-level loop:
>>> dis.dis(<the code object for `[x for x in range(10)]`>)
1 0 BUILD_LIST 0
3 LOAD_FAST 0 (.0)
>> 6 FOR_ITER 12 (to 21)
9 STORE_FAST 1 (x)
12 LO...
Getting a list of all subdirectories in the current directory
...der>"
RUNS = 1
def run_os_walk():
a = time.time_ns()
for i in range(RUNS):
fu = [x[0] for x in os.walk(directory)]
print(f"os.walk\t\t\ttook {(time.time_ns() - a) / 1000 / 1000 / RUNS:.0f} ms. Found dirs: {len(fu)}")
def run_glob():
a = time.time_ns()
for i in rang...
Any reason not to use '+' to concatenate two strings?
...B','C','D','E','F']
>>> myl2=[chr(random.randint(65,90)) for i in range(0,10000)]
Lets create two functions, UseJoin and UsePlus to use the respective join and + functionality.
>>> def UsePlus():
return [myl[i] + myl[i + 1] for i in range(0,len(myl), 2)]
>>> def Us...
The conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value
...ninitialized DateTime, which is set to 0001-01-01, which is outside of the range of SQL Server's DATETIME.
Rather than using ApplyPropertyChanges, I'd suggest retrieving the object being modified, change the specific fields your form edits, then saving the object with those modifications; that way,...
Determining if a variable is within range?
...
between? would need two parameters it would not allow range.
– Manish Nagdewani
Nov 16 '16 at 13:12
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