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Matplotlib discrete colorbar
....N)
# make the scatter
scat = ax.scatter(x, y, c=tag, s=np.random.randint(100, 500, 20),
cmap=cmap, norm=norm)
# create a second axes for the colorbar
ax2 = fig.add_axes([0.95, 0.1, 0.03, 0.8])
cb = plt.colorbar.ColorbarBase(ax2, cmap=cmap, norm=norm,
spacing='proportional', ...
How to create a drop shadow only on one side of an element?
...
.box-shadow:after {
content:"";
position:absolute;
width:100%;
bottom:1px;
z-index:-1;
transform:scale(.9);
box-shadow: 0px 0px 8px 2px #000000;
}
<div id="box" class="box-shadow"></div>
UPDATE 3
All my previous answers have been using extr...
Global and local variables in R
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Here you have a small example:
test.env <- new.env()
assign('var', 100, envir=test.env)
# or simply
test.env$var <- 100
get('var') # var cannot be found since it is not defined in this environment
get('var', envir=test.env) # now it can be found
...
What is a StackOverflowError?
...
Ha ha ha, so here it is: while (points < 100) {addMouseListeners(); moveball(); checkforcollision(); pause(speed);} Wow do I feel lame for not realizing that I would end up with a stackfull of mouse listeners... Thanks guys!
– Ziggy
...
Threads vs Processes in Linux
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Yes, I do have some data. I ran a test that creates 100,000 processes and a test that creates 100,000 threads. The thread version ran about 9x faster (17.38 seconds for processes, 1.93 for threads). Now this does only test creation time, but for short-lived tasks, creation ti...
Run php script as daemon process
...
+100
You could start your php script from the command line (i.e. bash) by using
nohup php myscript.php &
the & puts your p...
SortedList, SortedDictionary and Dictionary
...4. Anything beyond will see your 2:1 ratio quickly go up. For example if n=100 then you should have O(log n) = 15. Following a similiar thinking, your O(1) would weight 100. Conclusion: O(n) looses the battle fairly quickly. If it does not, it means your array is small, and then efficiency is not a ...
Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
...s also much faster on larger DataFrames
df = pd.DataFrame({'a': [1,2,3] * 100000, 'b': [2,3,4] * 100000})
DataFrame created with 300,000 rows
%timeit df["A1"], df["A2"] = calculate(df['a'])
2.65 ms ± 92.4 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
%timeit df["A1"], df["A2"] = z...
WaitAll vs WhenAll
... Task[] taskArray = { Task.Factory.StartNew(() => WaitAndThrow(1, 1000)),
Task.Factory.StartNew(() => WaitAndThrow(2, 2000)),
Task.Factory.StartNew(() => WaitAndThrow(3, 3000)) };
Task.WaitAll(taskArray);
...
Is there a use-case for singletons with database access in PHP?
...nswered Nov 1 '12 at 18:34
unity100unity100
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