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How to correctly implement custom iterators and const_iterators?
... class.
Define typedefs in your "custom container" class.
e.g. typedef blRawIterator< Type > iterator;
e.g. typedef blRawIterator< const Type > const_iterator;
Define "begin" and "end" functions
e.g. iterator begin(){return iterator(&m_data[0]);};
e.g. const_iterator cbegin()c...
Plot two graphs in same plot in R
...add another graph of x2 and y2 in the same graph. Both x1 and x2 have same range but different values.
– Kavipriya
Oct 21 '15 at 4:35
1
...
R and version control for the solo data analyst
...your .Rnw files and not the .tex files that get produced from them. Store raw data if it would be a pain to re-acquire. If possible, write and store a script that acquires your data and another that cleans or modifies it rather than storing changes to raw data.
As for learning a version control s...
Text Progress Bar in the Console [closed]
...
print()
Sample Usage
import time
# A List of Items
items = list(range(0, 57))
l = len(items)
# Initial call to print 0% progress
printProgressBar(0, l, prefix = 'Progress:', suffix = 'Complete', length = 50)
for i, item in enumerate(items):
# Do stuff...
time.sleep(0.1)
# Upd...
Date ticks and rotation in matplotlib
...t
now = dt.datetime.now()
hours = [now + dt.timedelta(minutes=x) for x in range(0,24*60,10)]
days = [now + dt.timedelta(days=x) for x in np.arange(0,30,1/4.)]
hours_value = np.random.random(len(hours))
days_value = np.random.random(len(days))
fig, axs = plt.subplots(2)
fig.subplots_adjust(hspace=0...
What's the difference between passing by reference vs. passing by value?
...ing") though it never quite caught on. Moreover, neither of these phrases draws a parallel with the original pair. No wonder the old terms ended up being reused in the absense of anything better, leading to confusion.4
NOTE: For a long time, this answer used to say:
Say I want to share a web ...
Python time measure function
...Timer
@Timer(average=False)
def matmul(a,b, times=100):
for i in range(times):
np.dot(a,b)
Output:
matmul:0.368434
matmul:2.839355
It can also work like a plug-in timer with namespace control(helpful if you are inserting it to a function which has a lot of codes and ma...
What are the differences between the threading and multiprocessing modules?
...t, niters):
'''
A useless CPU bound function.
'''
for i in range(niters):
result = (result * result * i + 2 * result * i * i + 3) % 10000000
return result
class CpuThread(threading.Thread):
def __init__(self, niters):
super().__init__()
self.niters = ...
Xcode duplicate/delete line
...clipse and having been used to duplicate lines all the time, it's pretty strange finding out that Xcode has no such function. Or does it?
...
List comprehension rebinds names even after scope of comprehension. Is this right?
...y found was single-value for clauses eg. sum100 = [s for s in [0] for i in range(1, 101) for s in [s + i]][-1], but just needs a comprehension-local var and works just as well in Python 3. I think "leaking" was the only way to set variable visible outside an expression. Everybody agreed these tech...