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Nullable type issue with ?: Conditional Operator
Could someone explain why this works in C#.NET 2.0:
5 Answers
5
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MySQL: Insert record if not exists in table
...tnames (name, address, tele)
SELECT * FROM (SELECT 'Rupert', 'Somewhere', '022') AS tmp
WHERE NOT EXISTS (
SELECT name FROM table_listnames WHERE name = 'Rupert'
) LIMIT 1;
Query OK, 1 row affected (0.00 sec)
Records: 1 Duplicates: 0 Warnings: 0
SELECT * FROM `table_listnames`;
+----+------...
How to get element by classname or id
... to access the DOM reference instead of the the jqLite reference - element[0] instead of element:
link: function (scope, element, attrs) {
var elementResult = element[0].getElementsByClassName('multi-files');
}
Alternatively you can use the document.querySelector function (need the period here...
python pandas: apply a function with arguments to a series
...
170
Newer versions of pandas do allow you to pass extra arguments (see the new documentation). So no...
animating addClass/removeClass with jQuery
...le: http://jsfiddle.net/tw16/JfK6N/
#someDiv{
-webkit-transition: all 0.5s ease;
-moz-transition: all 0.5s ease;
-o-transition: all 0.5s ease;
transition: all 0.5s ease;
}
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Print all but the first three columns
...
50
A solution that does not add extra leading or trailing whitespace:
awk '{ for(i=4; i<NF; i++...
How do I convert a hexadecimal color to rgba with the Less compiler?
...e absolute opacity % (higher value means less transparent):
fade(@color, 50%); // Return @color with 50% opacity in rgba
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How to combine multiple conditions to subset a data-frame using “OR”?
... it is to be handled as I intended, since ...
> NA & 1
[1] NA
> 0 & NA
[1] FALSE
Order of arguments may matter when using '&".
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How to shift a column in Pandas DataFrame
...
In [18]: a
Out[18]:
x1 x2
0 0 5
1 1 6
2 2 7
3 3 8
4 4 9
In [19]: a.x2 = a.x2.shift(1)
In [20]: a
Out[20]:
x1 x2
0 0 NaN
1 1 5
2 2 6
3 3 7
4 4 8
...
Purge Kafka Topic
...;zkhost>:2181 --alter --topic <topic name> --config retention.ms=1000
And in newer Kafka releases, you can also do it with kafka-configs --entity-type topics
kafka-configs.sh --zookeeper <zkhost>:2181 --entity-type topics --alter --entity-name <topic name> --add-config retent...