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Preserving order with LINQ
...ts, but the elements which are returned will be in the same order.
If you convert to a different data structure, e.g. with ToLookup or ToDictionary, I don't believe order is preserved at that point - but that's somewhat different anyway. (The order of values mapping to the same key is preserved for...
pandas dataframe columns scaling with sklearn
...s a single feature or X.reshape(1, -1)
if it contains a single sample.
Converting your columns to numpy arrays should do the job (I prefer StandardScaler):
from sklearn.preprocessing import StandardScaler
scale = StandardScaler()
dfTest[['A','B','C']] = scale.fit_transform(dfTest[['A','B','C']...
How to override toString() properly in Java?
... // Append
.toString(); // Convert entire sequence to a single `String` object.
}
Person[ name=Alice | phone=555.867.5309 ]
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ASP.NET MVC: Custom Validation by DataAnnotation
...<string>();
var totalLength = values.Sum(x => x.Length) + Convert.ToString(value).Length;
if (totalLength < this.MinLength)
{
return new ValidationResult(this.FormatErrorMessage(validationContext.DisplayName));
}
return null;
}
}
...
How do I time a method's execution in Java?
...l Duration.between(start, end).getSeconds(). Duration also has methods to convert to other time units, e.g. toMillis() which converts to milliseconds.
– Emil Lunde
May 29 '18 at 13:29
...
Git Symlinks in Windows
...ome a problem for Windows developers. In windows (msysgit), the symlink is converted to a text file with a path to the file it points to. Instead, I'd like to convert the symlink into an actual Windows symlink.
...
Simple Digit Recognition OCR in OpenCV-Python
...size(ROI,tmp1, Size(10,10), 0,0,INTER_LINEAR ); //resize to 10X10
tmp1.convertTo(tmp2,CV_32FC1); //convert to float
sample.push_back(tmp2.reshape(1,1)); // Store sample data
imshow("src",src);
int c=waitKey(0); // Read corresponding label for contour from keyoard
c-=0x30; //...
How to merge a list of lists with same type of items to a single list of items?
... @SwimBikeRun SelectMany is used to take an IEnumerable of TSources, convert each TSource in the list into an IEnumerable of TResults, then concatenate all those IEnumerables into one big one. In this case you have a list of lists to start, so if you want to concatenate them the function to ma...
Do I have to guard against SQL injection if I used a dropdown?
... can validate that the POST value contains an integer, and use an array to convert that to text when needed. E.g:
<?php
// No, you don't need to specify the numbers in the array but as we're using them I always find having them visually there helpful.
$sizes = array(0 => 'All', 1 => 'Large...
jQuery selector for the label of a checkbox
...
Use .text() to convert object to string: alert($("label[for='comedyclubs']").text());
– Loren
Dec 12 '12 at 18:56
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