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Understanding slice notation
...ve slightly differently depending on the number of arguments, similarly to range(), i.e. both slice(stop) and slice(start, stop[, step]) are supported.
To skip specifying a given argument, one might use None, so that e.g. a[start:] is equivalent to a[slice(start, None)] or a[::-1] is equivalent to a...
What characters are forbidden in Windows and Linux directory names?
...klist of characters, you could use a whitelist. All things considered, the range of characters that make sense in a file or directory name context is quite short, and unless you have some very specific naming requirements your users will not hold it against your application if they cannot use the wh...
Javascript equivalent of Python's zip function
... make this handle any iterable (e.g. in Python you can use zip on strings, ranges, map objects, etc.), you could define the following:
function iterView(iterable) {
// returns an array equivalent to the iterable
}
However if you write zip in the following way, even that won't be necessary:
f...
How to initialize an array in one step using Ruby?
... can use an array literal:
array = [ '1', '2', '3' ]
You can also use a range:
array = ('1'..'3').to_a # parentheses are required
# or
array = *('1'..'3') # parentheses not required, but included for clarity
For arrays of whitespace-delimited strings, you can use Percent String syntax:
...
How to debug Google Apps Script (aka where does Logger.log log to?)
...p.getActiveSpreadsheet().getSheetByName("checklist");
var checklist_data_range = checklist.getDataRange();
var checklist_num_rows = checklist_data_range.getNumRows();
Logger.log("checklist num rows: " + checklist_num_rows);
var coredata = SpreadsheetApp.getActiveSpreadsheet().getSheetByName...
Multiple Updates in MySQL
...);
$DoQuery('INSERT INTO '.$TableName.' (i2) VALUES ('.implode('), (', range(2, $NumRows+1)).')');
if($TestNum==0)
{
$TestName='Transaction';
$Start=microtime(true);
$DoQuery('START TRANSACTION');
for($i=1;$i<=$NumRows;$i++)
$DoQuery('UPDAT...
How to get the caller's method name in the called method?
...file and file[0] + file[-1] != '<>': IndexError: string index out of range Can u please provide suggestion. Thanx in advance.
– Pooja
Aug 13 '14 at 11:07
...
How to get the input from the Tkinter Text Widget?
...2, columnspan=2)
_grid_size = self.grid_size()
for _col in range(_grid_size[0]):
self.grid_columnconfigure(_col, weight=1)
for _row in range(_grid_size[1] - 1):
self.grid_rowconfigure(_row + 1, weight=1)
def _is_two_args_handle(self):
sel...
How do I create a list of random numbers without duplicates?
...
This will return a list of 10 numbers selected from the range 0 to 99, without duplicates.
import random
random.sample(range(100), 10)
With reference to your specific code example, you probably want to read all the lines from the file once and then select random lines from the ...
How can I use threading in Python?
... As a really simple example, let's consider the problem of summing a large range by summing subranges in parallel:
import threading
class SummingThread(threading.Thread):
def __init__(self,low,high):
super(SummingThread, self).__init__()
self.low=low
self.high=high
...