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DbEntityValidationException - How can I easily tell what caused the error?
...ls. The validation errors are: The field PhoneNumber
must be a string or array type with a maximum length of '12'; The
LastName field is required.
You can drop the overridden SaveChanges in any class that inherits from DbContext:
public partial class SomethingSomethingEntities
{
public ov...
C/C++ line number
...N__ were treated as string literals; they could be used to initialize char arrays, and they could be concatenated with other string literals. GCC 3.4 and later treat them as variables, like __func__. In C++, __FUNCTION__ and __PRETTY_FUNCTION__ have always been variables."
– Jo...
Haversine Formula in Python (Bearing and Distance between two GPS points)
...
There is also a vectorized implementation, which allows to use 4 numpy arrays instead of scalar values for coordinates:
def distance(s_lat, s_lng, e_lat, e_lng):
# approximate radius of earth in km
R = 6373.0
s_lat = s_lat*np.pi/180.0
s_lng = np.deg2rad(s_lng...
How to clear Facebook Sharer cache?
..._RETURNTRANSFER, true );
curl_setopt( $ch, CURLOPT_POST, true );
$params = array(
'id' => '<update_url>',
'scrape' => true );
$data = http_build_query( $params );
curl_setopt( $ch, CURLOPT_POSTFIELDS, $data );
curl_exec( $ch );
$httpCode = curl_getinfo( $ch, CURLINFO_HTTP_CODE )...
AngularJS For Loop with Numbers & Ranges
...amic range.
var range = _.range(1, 11);
// val will be each number in the array not the index.
<div ng-repeat='val in range'>
{{ $index }}: {{ val }}
</div>
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Apply a function to every row of a matrix or a data frame
...ens, mu=c(-1,1), rho=0.6)
apply() can also be used on higher dimensional arrays and the MARGIN argument can be a vector as well as a single integer.
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Save the console.log in Chrome to a file
...t. It formats different types appropriately, can handle nested objects and arrays, and can optionally put a timestamp next to each log. You can also toggle live-logging in one place, and without having to remove all your logging statements.
...
Simple Pivot Table to Count Unique Values
...technique. I didn't know about this one. You can do the same thing with an array function =IF(SUM((A$2:A2=A2)*(B$2:B2=B2)) > 1, 0, 1) (press Ctrl-Shift-Enter when entering the formula so it acquires {} around it).
– ErikE
Feb 10 '13 at 8:07
...
Traverse all the Nodes of a JSON Object Tree with JavaScript
...es(jsonObj).forEach(([key, value]) => {
// key is either an array index or object key
traverse(value);
});
}
else {
// jsonObj is a number or string
}
}
This should be a good starting point. I highly recommend using modern javascript methods ...
reducing number of plot ticks
... values sampled from the original distribution but from the indexes of the array returned by np.linspace(ymin, ymax, N).
To display N values evenly spaced from your original tick labels, use the set_yticklabels() method. Here is a snippet for the y axis, with integer labels:
import numpy as np
imp...