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Should each and every table have a primary key?
... creates a primary key if you didn't specify it explicitly, thus making an extra column you don't have access to.
Note that a primary key can be composite.
If you have a many-to-many link table, you create the primary key on all fields involved in the link. Thus you ensure that you don't have two ...
How to make a promise from setTimeout
...(msg) {
var p = document.createElement('p');
p.innerHTML = String(msg);
document.body.appendChild(p);
}
})();
</script>
</body>
</html>
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What does MissingManifestResourceException mean and how to fix it?
...rceMan = temp;
}
return resourceMan;
}
}
The literal string "Servers.Resources" had to be changed to "RT.Servers.Resources". I did this manually, but running the custom tool would have equally well done it.
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What is the difference between Python and IPython?
...
IPython is basically the "recommended" Python shell, which provides extra features. There is no language called IPython.
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How to make the first option of selected with jQuery
...ected attribute. For example, attr("selected", "selected"). Without this extra parameter, the selection isn't made.
– David Andres
Sep 12 '09 at 4:36
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List files in local git repo?
...by my Git repo. If the directory had additional files, it would mean those extra files were not being tracked. You can add files using git add <file>... of course.
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Is there any way to git checkout previous branch?
...ing equivalent (get reflog and filter it to lines containing ": checkout:" string and then extract branch name). This is actually what git does
– Mariusz Pawelski
Nov 4 '18 at 0:46
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How do you convert an entire directory with ffmpeg?
...you could use Bash parameter substitution if you would like to replace the string "x265" with "x264" if you're transcoding from H.265 to H.264 which is a common use case. for f in *.mkv; do ffmpeg -i "$f" -map 0 -movflags faststart -c:v libx264 -c:a copy -c:s copy "${f/x265/x264}"; done
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Using Rails 3.1, where do you put your “page specific” JavaScript code?
...I really like this solution. The only problem I have with it is that those extra manifests are not compressed/uglified. They are properly compiled though. Is there a solution or am I missing something?
– clst
Dec 8 '11 at 16:31
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Keyboard shortcuts with jQuery
...tcuts (like 1 letter, for example just g) you could easily do it without a extra plugin:
$(document).keypress(function(e) {
if(e.charCode == 103) {
// Your Code
}
});
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