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SQL join on multiple columns in same tables
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Join like this:
ON a.userid = b.sourceid AND a.listid = b.destinationid;
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How can I click a button behind a transparent UIView?
... the subview takes up the center of the screen with 100 px margins on all sides. We then add a bunch of little stuff to click on inside that subview. We are only using the subview to take advantage of the new frame ( x=0, y=0 inside the subview is actually 100,100 in the parent view).
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Java Enum definition
...n? By making the type argument the new type itself. So if I've got an enum called StatusCode, it would be equivalent to:
public class StatusCode extends Enum<StatusCode>
Now if you check the constraints, we've got Enum<StatusCode> - so E=StatusCode. Let's check: does E extend Enum<...
What is the instanceof operator in JavaScript?
...rops
return this;
}
function SubFoo(){ //a SubFoo constructor
Foo.call( this ); //inherit static props
//assign some new props
return this;
}
SubFoo.prototype = Object.create(Foo.prototype); // Inherit prototype
SubFoo.prototype.constructor = SubFoo;
Now that we have a couple of ...
psql: FATAL: role “postgres” does not exist
...tgres.
You can make your local install look a bit more traditional and avoid these problems by doing a one time:
/Applications/Postgres.app/Contents/Versions/9.*/bin/createuser -s postgres
which will make those FATAL: role "postgres" does not exist go away.
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How to escape hash character in URL
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@zw963 did you find a solution
– Dave
Aug 29 '17 at 14:24
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Can I comment out a line in a .git/config file?
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
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MongoDB vs. Cassandra [closed]
...hen we were assessing NoSQL databases, was the querying - Cassandra is basically just a giant key/value store, and querying is a bit fiddly (at least compared to MongoDB), so for performance you'd have to duplicate quite a lot of data as a sort of manual index. MongoDB, on the other hand, uses a "qu...
Concatenate two slices in Go
... function the argument is equivalent to a parameter of type []T. At
each call of f, the argument passed to the final parameter is a new
slice of type []T whose successive elements are the actual arguments,
which all must be assignable to the type T. The length of the slice is
therefore the n...
How to git commit a single file/directory
... to be more explicit, git commit -m 'my notes' -- path/to/my/file.ext.
Incidentally, git v1.5.2.1 is 4.5 years old. You may want to update to a newer version (1.7.8.3 is the current release).
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