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Postgres unique constraint vs index
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Let's check uniqueness, just in case.
test=# insert into master values (0, 0);
INSERT 0 1
test=# insert into master values (0, 1);
ERROR: duplicate key value violates unique constraint "master_con_id_key"
DETAIL: Key (con_id)=(0) already exists.
test=# insert into master values (1, 0);
ERROR: ...
Difference between .tagName and .nodeName
What is the difference between $('this')[0].nodeName and $('this')[0].tagName ?
4 Answers
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What is an MvcHtmlString and when should I use it?
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answered Feb 19 '10 at 2:16
LeviLevi
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Reasons that the passed Intent would be NULL in onStartCommand
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50
I'm surprised there's no discussion of the incoming flags. I'm going to monitor this in the logs...
How do I select an element in jQuery by using a variable for the ID?
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190
row = $("body").find('#' + row_id);
More importantly doing the additional body.find has no imp...
Calling clojure from java
...intln (str "(binomial 5 3): " (binomial 5 3)))
(println (str "(binomial 10042 111): " (binomial 10042 111)))
)
If you run it, you should see something like:
(binomial 5 3): 10
(binomial 10042 111): 49068389575068144946633777...
And here's a Java program that calls the -binomial function in th...
Why do all browsers' user agents start with “Mozilla/”?
...y.
In summary:
Mozilla browser gets released, with User-Agent Mozilla/1.0 (Win3.1). It is publicly renamed to Netscape, but in its User-Agent it keeps its original name .
Internet Explorer is released. It spoofs Netscape by starting its User-Agent with Mozilla/ because web servers were routinely ...
Linq to EntityFramework DateTime
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202
When using LINQ to Entity Framework, your predicates inside the Where clause get translated to ...
AJAX post error : Refused to set unsafe header “Connection”
...ladimir PalantWladimir Palant
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5
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Is it safe to remove selected keys from map within a range loop?
... one iteration to the next. If the map is nil, the number of iterations is 0.
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