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Understanding how recursive functions work
...er words, if you want to know the sum of all the integers between 2 and 5, start by computing the sum of all the integers between 3 and 5, then add 2.
So how do you compute the sum of all the integers between 3 and 5, inclusive? Well, that sum is
3 + 4 + 5
which can be thought of instead as
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How to remove non-alphanumeric characters?
... ]/i', '', $str);
The i stands for case insensitive.
^ means, does not start with.
\d matches any digit.
a-z matches all characters between a and z. Because of the i parameter you don't have to specify a-z and A-Z.
After \d there is a space, so spaces are allowed in this regex.
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Get Substring - everything before certain char
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Things have moved on a bit since this thread started.
Now, you could use
string.Concat(s.TakeWhile((c) => c != '-'));
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Delete all rows in an HTML table
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Points to note, on the Watch out for common mistakes:
If your start index is 0 (or some index from begin), then, the correct code is:
var tableHeaderRowCount = 1;
var table = document.getElementById('WRITE_YOUR_HTML_TABLE_NAME_HERE');
var rowCount = table.rows.length;
for (var i = tabl...
How to create the perfect OOP application [closed]
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So, how to approach these sorts of problems in the future?
I would have started by highlighting every important noun in the problem description:
Basic sales tax is applicable at a rate of 10% on all goods, except books, food, and medical products that are exempt. Import duty is an additional ...
Visual Studio 2010 isn't building before a run when there are code changes
I've been using using F5 (Start Debugging) for years to build the code (if its out of date), and then debug. This was working on VS 2010 also, however today it just start debugging without a build. Say I do a clean on the project, and then hit F5 instead of building it so it can run it throws an err...
SQL Server SELECT LAST N Rows
...0'000 records is nothing where you should mind about performance. When you start talking about millions of records than you can start thinking about performance
– Dom84
Apr 6 '17 at 8:59
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Shell script - remove first and last quote (") from a variable
...with nothing too. In the same invocation (there isn't any need to pipe and start another sed. Using -e you can have multiple text processing).
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How to stop creating .DS_Store on Mac? [closed]
...s write com.apple.desktopservices DSDontWriteNetworkStores true
Either restart the computer or log out and back in to the user account.
for more informations:
http://support.apple.com/kb/ht1629
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Convert String to Float in Swift
...will already be calling .floatValue!
Also, variables and constants should start with a lower case (including IBOutlets)
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