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Stack Memory vs Heap Memory [duplicate]
... case of C++, the code is not run in either the stack or the heap. You can test what happens if you run out of heap memory by repeatingly calling new to allocate memory in a loop without calling delete to free it it. But make a system backup before doing this.
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Find integer index of rows with NaN in pandas dataframe
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Here are tests for a few methods:
%timeit np.where(np.isnan(df['b']))[0]
%timeit pd.isnull(df['b']).nonzero()[0]
%timeit np.where(df['b'].isna())[0]
%timeit df.loc[pd.isna(df['b']), :].index
And their corresponding timings:
333 µ...
Regex to get string between curly braces
..., match any character between { and }, but don't be greedy - match the shortest string which ends with } (the ? stops * being greedy). The parentheses let you extract the matched portion.
Another way would be
/{([^}]*)}/
This matches any character except a } char (another way of not being greedy...
jQuery checkbox change and click event
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Tested in JSFiddle and does what you're asking for.This approach has the added benefit of firing when a label associated with a checkbox is clicked.
Updated Answer:
$(document).ready(function() {
//set initial state.
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what’s the difference between Expires and Cache-Control headers?
... Would you care to explain the downvote ? I did some extensive testing in Chrome, Safari, and Firefox. Cache Control has some options which are not available when using expires, but for all practical purposes, both work in exactly the same way.
– Rob
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Unable to import a module that is definitely installed
...ou optionally can repeat step two to see the location is now in the list.
Test step, try to import the package again... it works.
The downside? It is temporary, and you need to add it to the list each time.
share
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How can I check for Python version in a program that uses new language features?
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You can test using eval:
try:
eval("1 if True else 2")
except SyntaxError:
# doesn't have ternary
Also, with is available in Python 2.5, just add from __future__ import with_statement.
EDIT: to get control early enough, you c...
Read a variable in bash with a default value
...e that. Shell doesn't seem to loop nicely, so I try to avoid it. I might test the result from my function, and give one more try, but basically, I'm writing admin tools where things might go wrong, so I want the admin to be able to stop the script cleanly at any point.
– siba...
Xcode “The private key for is not installed on this mac - distributing”
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Having a similar problem, after several days of testing, checking, try to repairing and so on, what worked for me was simply:
Open Xcode's preferences (Accounts panel)
Click on "Manage Certificates".
Add a new certificate.
Then everything started working again.
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node.js: read a text file into an array. (Each line an item in the array.)
...). In any case here is a modification that avoids the mentioned substring (tested on a file several megabytes worth of "All work and no play makes Jack a dull boy"):
function readLines(input, func) {
var remaining = '';
input.on('data', function(data) {
remaining += data;
var index = r...