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Show/hide 'div' using JavaScript
...
How to show or hide an element:
In order to show or hide an element, manipulate the element's style property. In most cases, you probably just want to change the element's display property:
element.style.display = 'none'; // Hide
element.style.displ...
Postgres and Indexes on Foreign Keys and Primary Keys
...n ('pg_catalog', 'pg_toast')
and pg_catalog.pg_table_is_visible(c.oid)
order by
n.nspname
,t.relname
,c.relname
If you want to delve further (such as columns and ordering), you need to look at pg_catalog.pg_index. Using psql -E [dbname] comes in handy for figuring out how to query...
What is an application binary interface (ABI)?
...rary (just like the API did), only on a lower level. Your API defines the order in which you pass arguments to a function. Your ABI defines the mechanics of how these arguments are passed (registers, stack, etc.). Your API defines which functions are part of your library. Your ABI defines how yo...
Find and copy files
...intent is to copy the found files into /home/shantanu/tosend, you have the order of the arguments to cp reversed:
find /home/shantanu/processed/ -name '*2011*.xml' -exec cp "{}" /home/shantanu/tosend \;
Please, note: the find command use {} as placeholder for matched file.
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Linux command or script counting duplicated lines in a text file?
...ve counts, i.e.:
sort filename | uniq -c
and to get that list in sorted order (by frequency) you can
sort filename | uniq -c | sort -nr
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How to list all Git tags?
...tags?", for Git 2.0+)
git tag --sort=<type>
Sort in a specific order.
Supported type is:
"refname" (lexicographic order),
"version:refname" or "v:refname" (tag names are treated as versions).
Prepend "-" to reverse sort order.
That lists both:
annotated tags:...
What is “android:allowBackup”?
...you to copy your persistent application data to remote "cloud" storage, in order to provide a restore point for the application data and settings. If a user performs a factory reset or converts to a new Android-powered device, the system automatically restores your backup data when the application i...
Search text in stored procedure in SQL Server
...lect distinct object_name(id)
from syscomments
where text like '%[ABD]%'
order by object_name(id)
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How to declare a variable in MySQL?
... For example, SELECT DISTINCT IFNULL(@var:=Name,'unknown') FROM Customers ORDER BY <some non-indexed expression> LIMIT 10 appears to evaluate the variable assignments before the order-by is done, so that the returned value of @var might not even relate to any of the returned rows. The docs d...
What's the difference between Task.Start/Wait and Async/Await?
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what is the difference between doing Task.Wait and await task?
You order your lunch from the waiter at the restaurant. A moment after giving your order, a friend walks in and sits down next to you and starts a conversation. Now you have two choices. You can ignore your friend until the task ...