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Are foreign keys really necessary in a database design?
...imary reason for FKs. (In fact in certain circumstances (More inserts than selects for example) maintaining a FK might be slower. )
– Robert
Mar 21 '10 at 17:28
7
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Obstructed folders in Subversion
...clicked on the folder above the obstructed folder, clicked revert, then un-selected everything but the obstructed folder, and reverted that obstructed folder, so it would rip that folder out of the contents of the .svn file. Then I re-added the previously obstructed folder back with the exported fi...
How to write a simple database engine [closed]
...h pattern of delimiter is never used in your data itself. i.e. if you have selected <*> for example to separate columns, you should validate the data you are placing in this table not to contain this pattern. you could also use a row header and a column header by specifying size of row and som...
Creating a segue programmatically
...s, call that method when the appropriate button is clicked or table row is selected or whatever.
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Filter LogCat to get only the messages from My Application in Android?
...essage from another libraries. It's like Android Studio current 'Show only selected' filter. Thanks!
– equiman
Jun 26 '18 at 23:24
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Mongoose populate after save
... post.populate('group', 'name').populate({
path: 'wallUser',
select: 'name picture'
}, function(err, doc) {
res.json(doc);
});
});
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jQuery event to trigger action when a div is made visible
...ns) {
alert('Attributes changed!');
});
var target = document.querySelector('#testdiv');
observer.observe(target, {
attributes: true
});
});
<div id="testdiv" style="display:none;">hidden</div>
<button id="show">Show hidden div</button>
<script type="tex...
How to set the UITableView Section title programmatically (iPhone/iPad)?
...localize section titles using .string files e.g. Main.strings(German) just select the section in storyboard and note the Object ID
Afterwards go to your string file, in my case Main.strings(German) and insert the translation like:
"MLo-jM-tSN.headerTitle" = "Localized section title";
Addition...
How do you version your database schema? [closed]
...bles. I then copy the data over from the old database using INSERT INTO x SELECT FROM y and then apply all indexes, constraints and triggers.
New tables, new columns, deleted columns all get handled automatically and with a few little tricks to adjust the copy routine I can handle column renames, ...
SASS - use variables across multiple files
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This should be now the selected answer, since "import" is marked as deprecated and will be removed in the future.
– TyrionGraphiste
Jun 4 at 13:32
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