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What's the difference between TRUNCATE and DELETE in SQL
...a large amount of undo. Truncate generates a negligible amount of each.
Indexes
Oracle
A truncate operation renders unusable indexes usable again. Delete does not.
Foreign Keys
A truncate cannot be applied when an enabled foreign key references the table. Treatment with delete depends on th...
AngularJS error: 'argument 'FirstCtrl' is not a function, got undefined'
...turned out i didn't list the controller JS file (e.g. first-ctrl.js) in my index.html
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Modify request parameter with servlet filter
...(int i = 0; i < input.length(); i++) {
if (allowedChars.indexOf(input.charAt(i)) >= 0) {
result += input.charAt(i);
}
}
return result;
}
public String getParameter(String paramName) {
Strin...
jQuery pass more parameters into callback
.../ an object / whatever extra params you wish to pass.
$.post("someurl.php", someData, doSomething(extraStuff), "json");
};
What is happening?
In the last line, doSomething(extraStuff) is invoked and the result of that invocation is a function pointer.
Because extraStuff is passed as an argu...
AngularJS ng-click stopPropagation
... <td>
<button class="btn" ng-click="deleteUser(user.id, $index); $event.stopPropagation();">
Delete
</button>
</td>
</tr>
</table>
PLUNKER
shar...
What is the meaning of polyfills in HTML5?
...
Source and example of polyfill here:
http://www.programmerinterview.com/index.php/html5/html5-polyfill/
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python-pandas and databases like mysql
...chema', echo=False)
f = pd.read_sql_query('SELECT * FROM mytable', engine, index_col = 'ID')
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How can I have Github on my own server?
...
Just realized it is Ruby, it's really nice though
– JasonDavis
Dec 5 '11 at 19:50
11
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List columns with indexes in PostgreSQL
I would like to get the columns that an index is on in PostgreSQL.
23 Answers
23
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What's the difference between an inverted index and a plain old index?
In software engineering we create indexes all the time (e.g., in databases) but I also hear a lot of people talk about inverted indices. Is there something fundamentally different between the two? They sound like the same thing.
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