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Python: fastest way to create a list of n lists
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The probably only way which is marginally faster than
d = [[] for x in xrange(n)]
is
from itertools import repeat
d = [[] for i in repeat(None, n)]
It does not have to create a new int object in every iteration and is about 15 % faster on my machine.
Edit: Using NumPy, you can avoid the Pyt...
Python Request Post with param data
This is the raw request for an API call:
3 Answers
3
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Why does substring slicing with index out of range work?
...st a 1-character string.
(For the exact semantics of slicing outside the range of a sequence, see mgilson's answer.)
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How important is the order of columns in indexes?
... but keep in mind an index is stored on several pages and is a tree with a range of values, while Column 1 above does negate 1/2 the possibilities, the index already knows which index page to go straight to for the Column2 value, it does not necessary need Column 1 to narrow down the set.
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Remove duplicate dict in list in Python
... if I add some or lots of duplicates). It's a log-log plot so the complete range is covered.
The absolute times:
The timings relative to the fastest approach:
The second approach from thefourtheye is fastest here. The unique_everseen approach with the key function is on the second place, howe...
Render a variable as HTML in EJS
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Escaped output with <%= %> (escape function configurable)
Unescaped raw output with <%- %>
Newline-trim mode ('newline slurping') with -%> ending tag
Whitespace-trim mode (slurp all whitespace) for control flow with <%_ _%>
Control flow with <% %>
So, in your case it is ...
Copy a file in a sane, safe and efficient way
...eate bare std::filebuf instances when no actual formatting is needed.
For raw performance, you can't beat POSIX file descriptors. It's ugly but portable and fast on any platform.
The Linux way appears to be incredibly fast — perhaps the OS let the function return before I/O was finished? In any ...
Selecting the last value of a column
...iveSheet().getMaxRows();
var values = SpreadsheetApp.getActiveSheet().getRange(column + "1:" + column + lastRow).getValues();
for (; values[lastRow - 1] == "" && lastRow > 0; lastRow--) {}
return values[lastRow - 1];
}
Usage:
=lastValue("G")
EDIT:
In response to the comment a...
How to dismiss keyboard for UITextView with return key?
...Even then if you want to do this, implement the textView:shouldChangeTextInRange:replacementText: method of UITextViewDelegate and in that check if the replacement text is \n, hide the keyboard.
There might be other ways but I am not aware of any.
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Converting BigDecimal to Integer
...re 100% bet your life on it positive that the number is within the Integer range.
– Snekse
Mar 14 '15 at 20:53
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