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Python: Append item to list N times
...you may wish to modify later (like sub-lists, or dicts):
l = [{} for x in range(100)]
(The reason why the first method is only a good idea for constant values, like ints or strings, is because only a shallow copy is does when using the <list>*<number> syntax, and thus if you did somet...
Get lengths of a list in a jinja2 template
...
Alex' comment looks good but I was still confused with using range.
The following worked for me while working on a for condition using length within range.
{% for i in range(0,(nums['list_users_response']['list_users_result']['users'])| length) %}
<li> {{ nums['list_users_res...
Google Chrome display JSON AJAX response as tree and not as a plain text
...tle less intuitive, because on the Headers tab they let us switch between "raw" and "parsed", so one would expect that they'd offer similar "parsed" view on the Response tab.
– G. Stoynev
Oct 28 '13 at 18:20
...
UnicodeEncodeError: 'latin-1' codec can't encode character
...oding that is based on ISO-8859-1 but which puts extra characters into the range 0x80-0x9F. Code page 1252 is often confused with ISO-8859-1, and it's an annoying but now-standard web browser behaviour that if you serve your pages as ISO-8859-1, the browser will treat them as cp1252 instead. However...
Generate a heatmap in MatPlotLib using a scatter data set
... yv = data_coord2view_coord(ys, reso, extent[2], extent[3])
for x in range(reso):
for y in range(reso):
xp = (xv - x)
yp = (yv - y)
d = np.sqrt(xp**2 + yp**2)
im[y][x] = 1 / np.sum(d[np.argpartition(d.ravel(), n_neighbours)[:n_neighbour...
Insertion Sort vs. Selection Sort
... of the list, adjusting the list every time you insert. It is similar to arranging the cards in a Card game.
Time Complexity of selection sort is always n(n - 1)/2, whereas insertion sort has better time complexity as its worst case complexity is n(n - 1)/2. Generally it will take lesser or equal ...
Is there a RegExp.escape function in Javascript?
... $ (start and end of string), or -, which in a character group is used for ranges.
Use this function:
function escapeRegex(string) {
return string.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
}
While it may seem unnecessary at first glance, escaping - (as well as ^) makes the function suit...
How can I iterate over an enum?
...All[3] = { a, b, c }; Before doing that, I was getting obnoxious Error in range-based for... errors (because the array had an unknown size). Figured this out thanks to a related answer
– sage
Mar 4 '15 at 5:47
...
Should I use the datetime or timestamp data type in MySQL?
...in time I talk about. (See Nir's excellent answer below). [Downside: valid range].
– MattBianco
Sep 1 '10 at 14:36
123
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BaseException.message deprecated in Python 2.6
...r: 'ascii' codec can't encode characters in position 24-25: ordinal not in range(128)
print(my) # outputs 'my detailed description'
### Solution 2
# Works in Python 2.x if exception only has ASCII characters,
# should always work in Python 3.x
str(my)
### Solution 3
# Required in Python 2.x i...