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Cannot simply use PostgreSQL table name (“relation does not exist”)
....
In other words, the following fails:
CREATE TABLE "SF_Bands" ( ... );
SELECT * FROM sf_bands; -- ERROR!
Use double-quotes to delimit identifiers so you can use the specific mixed-case spelling as the table is defined.
SELECT * FROM "SF_Bands";
Re your comment, you can add a schema to th...
Get names of all files from a folder with Ruby
...ng subdirectories and ".", ".." dotted folders:
Dir.entries("your/folder").select { |f| File.file? File.join("your/folder", f) }
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In STL maps, is it better to use map::insert than []?
...<std::endl;
}
};
int Sample::_noOfObjects = 0;
int main(int argc, char* argv[])
{
Sample sample;
std::map<int,Sample> map;
map.insert( std::make_pair<int,Sample>( 1, sample) );
//map[1] = sample;
return 0;
}
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How to count occurrences of a column value efficiently in SQL?
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This should work:
SELECT age, count(age)
FROM Students
GROUP by age
If you need the id as well you could include the above as a sub query like so:
SELECT S.id, S.age, C.cnt
FROM Students S
INNER JOIN (SELECT age, count(age) a...
Count Rows in Doctrine QueryBuilder
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Something like:
$qb = $entityManager->createQueryBuilder();
$qb->select('count(account.id)');
$qb->from('ZaysoCoreBundle:Account','account');
$count = $qb->getQuery()->getSingleScalarResult();
Some folks feel that expressions are somehow better than just using straight DQL. One...
Simplest way to read json from a URL in java
...tStreamReader;
import java.io.Reader;
import java.net.URL;
import java.nio.charset.Charset;
import org.json.JSONException;
import org.json.JSONObject;
public class JsonReader {
private static String readAll(Reader rd) throws IOException {
StringBuilder sb = new StringBuilder();
int cp;
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minimum double value in C/C++
...tion just has to work around it. See the floating-point model in 5.2.4.2.2 Characteristics of floating types <float.h> p2 of C99 (may have been moved elsewhere since then).
– user743382
Nov 10 '14 at 22:23
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How to get value of selected radio button?
I want to get the selected value from a group of radio buttons.
28 Answers
28
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Get a list of checked checkboxes in a div using jQuery
I want to get a list of names of checkboxes that are selected in a div with certain id. How would I do that using jQuery?
8...
Find closing HTML tag in Sublime Text
...trl+Shift+A for Windows and Linux users, Command+Shift+A for Mac users) to select the whole block within the currently selected tag.
For example, if you pressed this while your text cursor was within the outer div tag in the code below, all the divs with class selected would be selected.
<div c...