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How to round an average to 2 decimal places in PostgreSQL?
...old syntax for casting,
SELECT ROUND(AVG(some_column)::numeric,2)
FROM table;
works with any version of PostgreSQL.
There are a lack of overloads in some PostgreSQL functions, why (???): I think "it is a lack" (!), but @CraigRinger, @Catcall and the PostgreSQL team agree about "pg's historic r...
How to use pull to refresh in Swift?
...ddTarget(self, action: #selector(self.refresh(_:)), for: .valueChanged)
tableView.addSubview(refreshControl) // not required when using UITableViewController
}
@objc func refresh(_ sender: AnyObject) {
// Code to refresh table view
}
At some point you could end refreshing.
refreshControl...
Calling a function of a module by using its name (a string)
...["myfunction"]()
locals returns a dictionary with a current local symbol table. globals returns a dictionary with global symbol table.
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What are the differences between a multidimensional array and an array of arrays in C#?
...
Simply put multidimensional arrays are similar to a table in DBMS.
Array of Array (jagged array) lets you have each element hold another array of the same type of variable length.
So, if you are sure that the structure of data looks like a table (fixed rows/columns), you can ...
How to get disk capacity and free space of remote computer
...omputers (input from the PowerShell pipeline) and displays the output in a table format with numeric values in human-readable form:
PS> $cred = Get-Credential -Credential 'example\administrator'
PS> 'db01','dc01','sp01' | Get-DiskFree -Credential $cred -Format | Format-Table -GroupBy Name -Au...
Which HTML elements can receive focus?
...ment, HTMLSelectElement, HTMLTextAreaElement and HTMLAnchorElement. This notably omits HTMLButtonElement and HTMLAreaElement.
Today's browsers define focus() on HTMLElement, but an element won't actually take focus unless it's one of:
HTMLAnchorElement/HTMLAreaElement with an href
HTMLInputElement/...
Is there a point to minifying PHP?
...o improve performance... after performing benchmarking and profiling and establishing that caching itself will be the best possible performance gain.
– Charles
Nov 2 '10 at 16:58
1...
There is no ViewData item of type 'IEnumerable' that has the key 'xxx'
...e is the source SelectList.
What happened with my error was:
Because the table containing the drop down lists was in a partial view and the ViewData had been changed and no longer contained the SelectList I had referenced, the HtmlHelper (instead of throwing an error) tried to find the SelectList...
ActiveRecord.find(array_of_ids), preserving order
...
for me chaining don't work. Here tables name should be added before id:text like this: ["position((',' || somethings.id::text || ',') in ?)", ids.join(',') + ','] full version that worked for me: scope :for_ids_with_order, ->(ids) { order = sanitize_...
How to delete all datastore in Google App Engine?
...n appengine) then datastore --> dataviewer, select all the rows for the table you want to delete and hit the delete button (you'll have to do this for all your tables).
You can do the same programmatically through the remote_api (but I never used it).
If you're talking about the development dat...