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How can I tell if a DOM element is visible in the current viewport?
... old answer is very slow, not accurate and has several bugs.
The solution selected as correct is almost never precise. You can read more about its bugs.
This solution was tested on Internet Explorer 7 (and later), iOS 5 (and later) Safari, Android 2.0 (Eclair) and later, BlackBerry, Opera Mob...
iOS app error - Can't add self as subview
...ns a list of note objects. The note object has a content property in html. Select a note will go to the detail controller.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
//get note object
DetailViewController *controller = [[DetailViewControlle...
What's the difference between HEAD^ and HEAD~ in Git?
... commit with only one parent, rev~ and rev^ mean the same thing. The caret selector becomes useful with merge commits because each one is the child of two or more parents — and strains language borrowed from biology.
HEAD^ means the first immediate parent of the tip of the current branch. HEAD^ is...
Best practices for SQL varchar column length [closed]
...hen you need to worry about it and make them smaller. But if you only ever select 1 row from that table, then you can just make them all 255 and it won't matter.
See: What are the optimum varchar sizes for MySQL?
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How is a tag different from a branch in Git? Which should I use, here?
...;" would generate anonymous unnamed branch (so called 'detached HEAD') and select state of tag. Creating a new commit does it on this unnamed branch, and does not change what tag points to.
– Jakub Narębski
Feb 16 '12 at 14:04
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Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
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+1; I've tried the formula in Maple for select numbers and it works. I still couldn't convince myself WHY it works, though.
– polygenelubricants
Aug 16 '10 at 11:12
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How to add an Access-Control-Allow-Origin header
...for the file
scroll down to the file
click the cog icon
click Edit Headers
select Access-Control-Allow-Origin
add the single character '*' (without the quotes)
hit enter
repeat for the other files
If you need to continue and do #2, then you'll need a command line with CURL
curl -D - --header "X-A...
how to provide a swap function for my class?
...declared in the same namespace as the type for which they are provided get selected through argument-dependent lookup over this generic version.
But note that directly using the std::swap function for a user-defined class calls the generic version of std::swap instead of the user-defined swap:
my...
How to link godaddy domain with AWS Elastic Beanstalk environment?
...s).
Now you can link you domain with your Elastic Beanstalk site. To do so select/create proper A record type in Route 53 and set Alias for it:
Hope it helps.
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What is a proper naming convention for MySQL FKs?
... foreign key constraint name by running a query:
use information_schema;
select TABLE_NAME,COLUMN_NAME,CONSTRAINT_NAME, REFERENCED_TABLE_NAME,REFERENCED_COLUMN_NAME from KEY_COLUMN_USAGE where REFERENCED_TABLE_SCHEMA = 'your_db_schema_name' ORDER BY TABLE_NAME;
For example you might receive the ...