Python return statement error ” ‘return’ outside function”
The return statement only makes sense inside functions:
check if a std::vector contains a certain object?
Checking if v contains the element x: Checking if v contains elements (is non-empty):
How to move a file in Python?
os.rename(), os.replace(), or shutil.move() All employ the same syntax: Note that you must include the file name (file.foo) in both the source and destination arguments. If it is changed, the file will be renamed as well as moved. Note also that in the first two cases the directory in which the new file is being created must … Read more
How can I do a line break (line continuation)?
What is the line? You can just have arguments on the next line without any problems: Otherwise you can do something like this: or with explicit line break: Check the style guide for more information. Using parentheses, your example can be written over multiple lines: The same effect can be obtained using explicit line break: … Read more
Generate random number between two numbers in JavaScript
Important The following code works only if the minimum value is `1`. It does not work for minimum values other than `1`. If you wanted to get a random integer between 1 (and only 1) and 6, you would calculate:
CSS background-image-opacity?
If the background doesn’t have to repeat, you can use the sprite technique (sliding-doors) where you put all the images with differing opacity into one (next to each other) and then just shift them around with background-position. Or you could declare the same partially transparent background image more than once, if your target browser supports multiple backgrounds (Firefox … Read more
How do I get my C# program to sleep for 50 msec?
Remember though, that doing this in the main GUI thread will block your GUI from updating (it will feel “sluggish”) Just remove the ; to make it work for VB.net as well.
XGBoost XGBClassifier Defaults in Python
That isn’t how you set parameters in xgboost. You would either want to pass your param grid into your training function, such as xgboost’s train or sklearn’s GridSearchCV, or you would want to use your XGBClassifier’s set_params method. Another thing to note is that if you’re using xgboost’s wrapper to sklearn (ie: the XGBClassifier() or … Read more
Split string into array
Use the .split() method. When specifying an empty string as the separator, the split() method will return an array with one element per character.