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JavaScript: client-side vs. server-side validation
...lient side first because you can give better feedback to the average user. For example, if they enter an invalid email address and move to the next field, you can show an error message immediately. That way the user can correct every field before they submit the form.
If you only validate on the se...
Vim: How do you open another [No Name] buffer like the one on startup?
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Thanks for contributing an answer to Stack Overflow!Please be sure to answer the question. Provide details and share your research!But avoid …Asking for help, clarification, or responding to other answers.Making statements based o...
What is the difference between and ?
... page?
It doesn't help the browser to display the page, but it is useful for search engines, screen readers, and other things that might read and try to interpret the page, besides human beings.
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Newline in JLabel
...o leave it as <br>. It's called a void tag. <br /> still works for backwards compatibility.
– gsingh2011
Apr 27 '12 at 3:50
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MySQL Query - Records between Today and Last 30 Days
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You need to apply DATE_FORMAT in the SELECT clause, not the WHERE clause:
SELECT DATE_FORMAT(create_date, '%m/%d/%Y')
FROM mytable
WHERE create_date BETWEEN CURDATE() - INTERVAL 30 DAY AND CURDATE()
Also note that CURDATE() returns only th...
SQL Server Management Studio won't let me add an index to a table
...ame issue when trying to add "Included Columns". I just now realized that for years (a Decade exactly) all I had to do was close the Table Designer and right-click on the Index to select "Properties" in order to add/edit them.... All these years wasted on writing custom scripts. face-palm I want...
What is an idempotent operation?
...onal effect if it is called more than once with the same input parameters. For example, removing an item from a set can be considered an idempotent operation on the set.
In mathematics, an idempotent operation is one where f(f(x)) = f(x). For example, the abs() function is idempotent because abs(ab...
Regex to match a digit two or four times
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There's no specific syntax for that, but there are lots of ways to do it:
(?:\d{4}|\d{2}) <-- alternation: four digits or two
\d{2}(?:\d{2})? <-- two digits, and optionally two more
(?:\d{2}){1,2} <-- two digits, times one or two
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Executing a command stored in a variable from PowerShell
... with two variables
(command:string and parameters:array). It works fine for me. Assume
7z.exe is in the system path.
$cmd = '7z.exe'
$prm = 'a', '-tzip', 'c:\temp\with space\test1.zip', 'C:\TEMP\with space\changelog'
& $cmd $prm
If the command is known (7z.exe) and only parameters are var...
android fragment onRestoreInstanceState
... This also doesn't take care of resuming the fragment does it? its fine for configuration changes, but what if you go to an activity from a fragment and then go back to the fragment?
– speedynomads
Jun 4 '13 at 16:41
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