Find a value in a list [duplicate]

As for your first question: “if item is in my_list:” is perfectly fine and should work if item equals one of the elements inside my_list. The item must exactly match an item in the list. For instance, “abc” and “ABC” do not match. Floating point values in particular may suffer from inaccuracy. For instance, 1 … Read more

sendResponse not waiting for async function or Promise’s resolve [duplicate]

The callback of onMessage should return a literal true value (documentation) in order to keep the internal messaging channel open so that sendResponse can work asynchronously. Problem Your callback is declared with async keyword, so it returns a Promise, not a literal true value. Chrome extensions API doesn’t support Promise in the returned value of … Read more

How to change Bootstrap navbar collapse breakpoint

Bootstrap 5 (update 2023) As stated in the docs, For navbars that never collapse, add the .navbar-expand class on the navbar. For navbars that always collapse, don’t add any .navbar-expand class. Bootstrap 4 (update 2018) Changing the navbar breakpoint is easier in Bootstrap 4 using the navbar-expand-* classes: <nav class=”navbar fixed-top navbar-expand-sm”>..</nav> navbar-expand-sm = mobile … Read more

Can I create AxesSubplot objects, then add them to a Figure instance?

Typically, you just pass the axes instance to a function. For example: import matplotlib.pyplot as plt import numpy as np def main(): x = np.linspace(0, 6 * np.pi, 100) fig1, (ax1, ax2) = plt.subplots(nrows=2) plot(x, np.sin(x), ax1) plot(x, np.random.random(100), ax2) fig2 = plt.figure() plot(x, np.cos(x)) def plot(x, y, ax=None): if ax is None: ax … Read more

How does Python’s bitwise complement operator (~ tilde) work?

Remember that negative numbers are stored as the two’s complement of the positive counterpart. As an example, here’s the representation of -2 in two’s complement: (8 bits) 1111 1110 The way you get this is by taking the binary representation of a number, taking its complement (inverting all the bits) and adding one. Two starts … Read more

Run a scala code jar appear NoSuchMethodError:scala.Predef$.refArrayOps

Most probably you’re compiling your code locally with Scala 2.12 but at the server it’s running with Scala 2.13 or 2.11. Try to recompile your code with the version of Scala at the server. Scala 2.11, 2.12, 2.13 are binary incompatible. The signature of refArrayOps is different (in binary incompatible way) in Scala 2.13 def … Read more