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What would cause an algorithm to have O(log n) complexity?
...ant
Take any number n; say, 16. How many times can you divide n by two before you get a number less than or equal to one? For 16, we have that
16 / 2 = 8
8 / 2 = 4
4 / 2 = 2
2 / 2 = 1
Notice that this ends up taking four steps to complete. Interestingly, we also have that log2 16 = 4. Hmm...
How to select label for=“XYZ” in CSS?
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The selector would be label[for=email], so in CSS:
label[for=email]
{
/* ...definitions here... */
}
...or in JavaScript using the DOM:
var element = document.querySelector("label[for=email]");
...or in JavaScript using jQuery:
var element = ...
Make an image width 100% of parent div, but not bigger than its own width
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Using width:auto !important; fixed an issue in IE11 for me where the image would be larger than its container and IE11 not scaling down the image. Setting this in the img selector sorted the issue in IE11. However setting width:100%; without the other rule did nothing in IE11....
How do I get a file name from a full path with PHP?
For example, how do I get Output.map
14 Answers
14
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How do I remove all non alphanumeric characters from a string except dash?
...of the character class, or escaped with a backslash, to prevent being used for a range.
– Peter Boughton
Jul 9 '10 at 9:18
6
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Original purpose of ? [closed]
... to maintain a kind of a state.
Precisely. In fact, it's still being used for this purpose today because HTTP as we know it today is still, at least fundamentally, a stateless protocol.
This use case was actually first described in HTML 3.2 (I'm surprised HTML 2.0 didn't include such a description)...
How to initialize a two-dimensional array in Python?
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A pattern that often came up in Python was
bar = []
for item in some_iterable:
bar.append(SOME EXPRESSION)
which helped motivate the introduction of list comprehensions, which convert that snippet to
bar = [SOME EXPRESSION for item in some_iterable]
which is shorter a...
How do I handle too long index names in a Ruby on Rails ActiveRecord migration?
I am trying to add an unique index that gets created from the foreign keys of four associated tables:
9 Answers
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How to see full query from SHOW PROCESSLIST
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Show Processlist fetches the information from another table. Here is how you can pull the data and look at 'INFO' column which contains the whole query :
select * from INFORMATION_SCHEMA.PROCESSLIST where db = 'somedb';
You can add any condition or igno...
View a list of recent documents in Vim
...ment in the list. Is there another command which would do what I'm looking for?
8 Answers
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