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Rails 4 - Strong Parameters - Nested Objects
...nested attributes you do specify the attributes of nested object within an array. In your case it would be
Update as suggested by @RafaelOliveira
params.require(:measurement)
.permit(:name, :groundtruth => [:type, :coordinates => []])
On the other hand if you want nested of multiple ...
Find rows with multiple duplicate fields with Active Record, Rails & Postgres
...
I had to pass an explict array to select() as in: User.select([:first,:email]).group(:first,:email).having("count(*) > 1").count in order to work.
– Rafael Oliveira
Oct 6 '14 at 22:27
...
How to convert comma-delimited string to list in Python?
...at;dog:greff,snake/
example delimeters: ,;- /|:
'''
def string_to_splitted_array(data,delimeters):
#result list
res = []
# we will add chars into sub_str until
# reach a delimeter
sub_str = ''
for c in data: #iterate over data char by char
# if we reached a delimeter,...
Dynamically load a JavaScript file
...){
// First make sure it hasn't been loaded by something else.
if( Array.contains( includedFile, url ) )
return;
// Determine the MIME-type
var jsExpr = new RegExp( "js$", "i" );
var cssExpr = new RegExp( "css$", "i" );
if( type == null )
if( jsExpr.test( url...
Byte[] to InputStream or OutputStream
...
You create and use byte array I/O streams as follows:
byte[] source = ...;
ByteArrayInputStream bis = new ByteArrayInputStream(source);
// read bytes from bis ...
ByteArrayOutputStream bos = new ByteArrayOutputStream();
// write bytes to bos ...
b...
In php, is 0 treated as empty?
...as an integer)
0.0 (0 as a float)
"0" (0 as a string)
NULL
FALSE
array() (an empty array)
var $var; (a variable declared, but without a value in a class)
Note that this is exactly the same list as for a coercion to Boolean false. empty is simply !isset($var) || !$var. Try isset inst...
Finding the average of a list
...
Oh, but np.array(l).mean() is much faster.
– L. Amber O'Hearn
Sep 23 '15 at 19:16
8
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binning data in python with scipy/numpy
is there a more efficient way to take an average of an array in prespecified bins? for example, i have an array of numbers and an array corresponding to bin start and end positions in that array, and I want to just take the mean in those bins? I have code that does it below but i am wondering how it...
Each for object? [duplicate]
... option would be to use vanilla Javascript using the Object.keys() and the Array .map() functions like this
Object.keys(object).map(function(objectKey, index) {
var value = object[objectKey];
console.log(value);
});
See https://developer.mozilla.org/nl/docs/Web/JavaScript/Reference/Global...
How to get a value from a cell of a dataframe?
...
You can turn your 1x1 dataframe into a numpy array, then access the first and only value of that array:
val = d2['col_name'].values[0]
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