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C++ - passing references to std::shared_ptr or boost::shared_ptr
...e
{
...
sp->do_something();
...
}
How do you know that sp->do_something() will not blow up due to a null pointer?
It all depends what is in those '...' sections of the code. What if you call something during the first '...' that has the side-effect (somewhere in anot...
public static const in TypeScript
...
this is such a good answer. my coding is now happier because of it.
– gonzofish
Jul 6 '15 at 20:43
7
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Programmatically align a toolbar on top of the iPhone keyboard
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Just a warning to people stumbling across this question now: the UIKeyboardBoundsUserInfoKey is now deprecated in iPhone OS 3.2. There are other, similar ones such as UIKeyboardFrameBeginUserInfoKey that give the same information.
– Stephen Darlington
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How to find and return a duplicate value in array
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a = ["A", "B", "C", "B", "A"]
a.detect{ |e| a.count(e) > 1 }
I know this isn't very elegant answer, but I love it. It's beautiful one liner code. And works perfectly fine unless you need to process huge data set.
Looking for faster solution? Here you go!
def find_one_using_hash_map(arr...
How to read a .xlsx file using the pandas Library in iPython?
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In 0.20 and prior, this was sheetname rather than sheet_name (this is now deprecated in favor of the above):
dfs = pd.read_excel(file_name, sheetname=None)
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Replace a newline in TSQL
...e characters from the endpoints of the string, not from the 'body'.
Okay, now that the disclaimer is updated, here's the code.
-- =============================================
-- Description: TRIMs a string 'for real' - removes standard whitespace from ends,
-- and replaces ASCII-char's 9-13, whic...
Understanding ibeacon distancing
...ssi) over the calibrated transmitter power (txPower). The txPower is the known measured signal strength in rssi at 1 meter away. Each beacon must be calibrated with this txPower value to allow accurate distance estimates.
While the distance estimates are useful, they are not perfect, and require ...
How JavaScript closures are garbage collected
...ndow.f_ = f();
window.f_('some');
In example above the GC has no way of knowing if the variable is used or not (code tested and works in Chrome30, FF25, Opera 12 and IE10).
The memory is released if the reference to the object is broken by assigning another value to window.f_.
In my opinion this...
SSH Key - Still asking for password and passphrase
... UseKeychain yes
AddKeysToAgent yes
IdentityFile ~/.ssh/id_rsa
And now my password is remembered between restarts of my Mac!
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Allow CORS REST request to a Express/Node.js application on Heroku
...at works for requests from the js console in Chrome, and URL bar, etc. I'm now trying to get it working for requests from another app, on a different domain (CORS).
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