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ERROR 2006 (HY000): MySQL server has gone away
...L/MariaDB server.
Double check the value was set properly by:
mysql -sve "SELECT @@max_allowed_packet" # or:
mysql -sve "SHOW VARIABLES LIKE 'max_allowed_packet'"
You got a timeout from the TCP/IP connection on the client side.
Solution: Increase wait_timeout variable.
You tried to run a query a...
How is the default submit button on an HTML form determined?
...cus for any visual element yet will still cause the invisible button to be selected. To avoid this issue, simply set tabindex attributes accordingly and omit a tabindex attribute on the invisible submit button. While it may seem out of place to promote these styles to !important, they should preven...
How to handle click event in Button Column in Datagridview?
...ast the sender to type DataGridView, we can get the Columns collection and select the current column using e.ColumnIndex. Then check if that object is of type DataGridViewButtonColumn.
Of course, if you need to distinguish between multiple buttons per grid, you can then select based on the column n...
IntelliJ 13 - Add Navigate Back/Forward to toolbar?
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For some reason the toolbar is not visible by default.
In the View menu, select Toolbar. That should fix it.
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How do I insert datetime value into a SQLite database?
...liably compare dates with different precision using lexical ordering, e.g "SELECT '2007-01-02 10:00:00' > '2007-01-02 10:00';" returns 1 but "SELECT datetime('2007-01-02 10:00:00') > datetime('2007-01-02 10:00');" returns 0.
– Shane
Mar 21 '14 at 17:17
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anchor jumping by using javascript
... element. If you want to get the first element out from your query, do $(mySelector)[0].scrollIntoView().
– Derek 朕會功夫
Jun 8 '18 at 12:48
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C# Pass Lambda Expression as Method Parameter
....Where(predicate.Compile()) //here compile your clausuly
select x;
newList.ToList();//return a new list
}
Calling method
Method(v => v.Equals(1));
You can do the same in their class, see this is example.
public string Name {get;set;}
public static List...
Two submit buttons in one form
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For i18n purposes it might be better to use the selected answer.
– Robin Green
Nov 29 '12 at 16:08
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How can I filter lines on load in Pandas read_csv function?
... read_csv. However, read_csv returns a DataFrame, which can be filtered by selecting rows by boolean vector df[bool_vec]:
filtered = df[(df['timestamp'] > targettime)]
This is selecting all rows in df (assuming df is any DataFrame, such as the result of a read_csv call, that at least contains ...
How do I specify a pointer to an overloaded function?
...putIterator, InputIterator, UnaryFunction );
Template deduction needs to select a type for UnaryFunction at the point of the call. But f doesn't have a specific type - it's an overloaded function, there are many fs each with different types. There is no current way for for_each to aid the template...