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Is Big O(logn) log base e?
...ors are removed. Converting from one logarithm base to another involves multiplying by a constant factor.
So O(log N) is equivalent to O(log2 N) due to a constant factor.
However, if you can easily typeset log2 N in your answer, doing so is more pedagogical. In the case of binary tree searching, ...
“Automatic” vs “Automatic (Delayed start)”
...actually 2 minutes after the last "automatic" service has started, by default. This can be configured by a registry key, according to Windows Internals and other sources (3,4).
The registry keys of interest (At least in some versions of windows) are:
HKLM\SYSTEM\CurrentControlSet\services\<se...
Is it okay to use now?
...ile phone web app and I have several text fields that could benefit from <input type="tel"/> . iPhones will adjust the keyboard for the user, but I'm worried about breaking backwards compatibility. What I'm hoping is that browsers/phone that support this can assist the user and other browser ...
Disabling swap files creation in vim
...
I found the answer here:
vim -n <file>
opens file without swapfile.
In addition:
set dir=/tmp
in .vimrc creates the swapfiles in /tmp.
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How to get share counts using graph API
...=http://www.MY-LINK.com&fields=og_object{engagement}&access_token=<access_token>
Result:
{
"og_object": {
"engagement": {
"count": 93,
"social_sentence": "93 people like this."
},
"id": "801998203216179"
},
"id": "http://techcrunch.com/2015/04/06/the...
How can I use UUIDs in SQLAlchemy?
...ry_key=True)
id = db.Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4, unique=True, nullable=False)
Be careful not to miss passing the callable uuid.uuid4 into the column definition, rather than calling the function itself with uuid.uuid4(). Otherwise, you will have the same sca...
Best way to detect that HTML5 is not supported
...way to deal with situations where the browser does not support the HTML5 <canvas> tag is to embed some fallback content like:
...
Why is printing “B” dramatically slower than printing “#”?
...nds) grew up in the days of the Apple ][ and the zx80/81. There was no built in word wrap back then. So we both ended up writing our own — more than once. And those lessons stick with you, they get burned in to your lizard brain. But if you leaned to code after that, when your environment word...
How to switch to REPLACE mode in VIM
...al mode.
Of course you can map any key to R, for example by doing
:map <F5> R
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Remove first 4 characters of a string with PHP
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If you’re using a multi-byte character encoding and do not just want to remove the first four bytes like substr does, use the multi-byte counterpart mb_substr. This does of course will also work with single-byte strings.
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