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python numpy ValueError: operands could not be broadcast together with shapes
.../docs.scipy.org/doc/numpy/user/basics.broadcasting.html
(Please note that if X and y are of type numpy.matrix, then asterisk can be used as matrix multiplication. My recommendation is to keep away from numpy.matrix, it tends to complicate more than simplify things.)
Your arrays should be fine with...
Synchronise ScrollView scroll positions - android
...oldx, int oldy) {
super.onScrollChanged(x, y, oldx, oldy);
if(scrollViewListener != null) {
scrollViewListener.onScrollChanged(this, x, y, oldx, oldy);
}
}
}
And we should specify this new ObservableScrollView class in the layout, instead of the existing Sc...
What is process.env.PORT in Node.js?
....PORT || 3000 means: whatever is in the environment variable PORT, or 3000 if there's nothing there.
So you pass that app.listen, or to app.set('port', ...), and that makes your server be able to accept a parameter from the environment what port to listen on.
If you pass 3000 hard-coded to app.lis...
UIGestureRecognizer on UIImageView
...rInteractionEnabled still must be set to YES/true in Xcode 8 Objective-C/Swift
– leanne
Sep 5 '17 at 19:19
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symbolic link: find all files that link to this file
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It depends, if you are trying to find links to a specific file that is called foo.txt, then this is the only good way:
find -L / -samefile path/to/foo.txt
On the other hand, if you are just trying to find links to any file that happen...
Why do browsers match CSS selectors from right to left?
... left. So they first find the children and then check their parents to see if they match the rest of the parts of the rule.
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Better way to check variable for null or empty string?
Since PHP is a dynamic language what's the best way of checking to see if a provided field is empty?
10 Answers
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C# Convert List to Dictionary
...ey, the second one picks the value.
You can play with it and make values differ from the keys, like this:
var res = list.ToDictionary(x => x, x => string.Format("Val: {0}", x));
If your list contains duplicates, add Distinct() like this:
var res = list.Distinct().ToDictionary(x => x, x...
CSV in Python adding an extra carriage return, on Windows
...d a binary format by the libraries involved, with \r\n separating records. If that separator is written in text mode, the Python runtime replaces the \n with \r\n, hence the \r\r\n observed in the file.
See this previous answer.
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Do you need break in switch when return is used?
I was wondering if I need to use "break" in "switch" function when "return" is used.
7 Answers
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