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How to delete duplicates on a MySQL table?
...le employee, with the following columns:
employee (first_name, last_name, start_date)
In order to delete the rows with a duplicate first_name column:
delete
from employee using employee,
employee e1
where employee.id > e1.id
and employee.first_name = e1.first_name
...
in_array multiple values
...
As a developer, you should probably start learning set operations (difference, union, intersection). You can imagine your array as one "set", and the keys you are searching for the other.
Check if ALL needles exist
function in_array_all($needles, $haystack) {...
How to check if variable's type matches Type stored in a variable
... if GetType returned null, then I'd be worried that plenty of things would start to throw... but point taken, you are of course right
– Sam Holder
May 2 '12 at 14:11
...
How do I vertically center text with CSS? [duplicate]
..." - horizontally aligns
</p>
</div>
A good place to start with Flexbox to see some of its features and get syntax for maximum browser support is flexyboxes
Also, browser support nowadays is very good: caniuse
For cross-browser compatibility for display: flex and align-items...
How to call a method defined in an AngularJS directive?
... need to access the directive's methods and don't have a control attr will start throwing errors about not being able to set attributes on undefined
– CheapSteaks
Mar 16 '14 at 0:55
...
Find nearest latitude/longitude with an SQL query
...
SELECT latitude, longitude, SQRT(
POW(69.1 * (latitude - [startlat]), 2) +
POW(69.1 * ([startlng] - longitude) * COS(latitude / 57.3), 2)) AS distance
FROM TableName HAVING distance < 25 ORDER BY distance;
where [starlat] and [startlng] is the position where to start measur...
Reverting part of a commit with git
...orking tree but creates no commits, so if you really stuff up you can just start again with git reset --hard -- file/you/want/to/fix.ext.
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Are Git forks actually Git clones?
...it has much better support for forking the entire codebase and effectively starting a new project.
Git (not GitHub) natively supports "forking" an entire repo (ie, cloning it) in a couple of ways:
when you clone, a remote called origin is created for you
by default all the branches in the clone w...
How to exclude this / current / dot folder from find “type d”
can be used to find all directories below some start point. But it returns the current directory ( . ) too, which may be undesired. How can it be excluded?
...
Why is it faster to check if dictionary contains the key, rather than catch the exception in case it
...marks like this show really large penalties for exceptions once your loops start including file or database activities throwing an exception on every iteration matters very little for performance. Compare 1st and 2nd table: codeproject.com/Articles/11265/…
– Dan Is Fiddli...