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Want to find records with no associated records in Rails
... the DISTINCT. Otherwise, I think you'd want to normalize out the data and index in that case. I might do that by creating a friend_ids hstore or serialized column. Then you could say Person.where(friend_ids: nil)
– Unixmonkey
Dec 20 '16 at 16:02
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MySQL connection not working: 2002 No such file or directory
...al on setting up LAMP is: http://library.linode.com/lamp-guides/centos-5.3/index-print
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What is sys.maxint in Python 3?
...xsize can be used as an
integer larger than any practical list or string index. It conforms to
the implementation’s “natural” integer size and is typically the same
as sys.maxint in previous releases on the same platform (assuming the
same build options).
http://docs.python.org/3.1/w...
Eclipse interface icons very small on high resolution screen in Windows 8.1
...this issue is solved in Eclipse 4.6 Neon https://www.eclipse.org/downloads/index-developer.php (the current developer version).
The icons look a bit sad (low resolution) but at least they are scaled correctly on my 4k screen.
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Algorithm for Determining Tic Tac Toe Game Over
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He might've been thinking that the cells were zero-indexed.
– Matias Grioni
Nov 6 '17 at 23:39
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stash@{1} is ambiguous?
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How does this answer the question? There is no #3 index in stash list. If this is a serious answer please explain why this command will solve the problem
– Brad
Mar 8 '17 at 19:59
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How to install both Python 2.x and Python 3.x in Windows
...fine where the package should be installed:
http://docs.python.org/install/index.html#alternate-installation-windows-the-prefix-scheme
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Load HTML file into WebView
...iewClient(new WebViewClient());
webView.loadUrl("file:///android_asset/index.html");
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UITableView set to static cells. Is it possible to hide some of the cells programmatically?
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Objective-C:
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell* cell = [super tableView:tableView cellForRowAtIndexPath:indexPath];
if(cell == self.cellYouWantToHide)
return 0; //set the hidden cell's height to 0
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What's the Point of Multiple Redis Databases?
...eys command. You'll find far better performance if you simply create a key index. Whenever adding a key, add the key name to a set. The keys command is not terribly useful once you scale up since it will take significant time to return.
Let the access pattern determine how to structure your data r...