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Which equals operator (== vs ===) should be used in JavaScript comparisons?
...'m using JSLint to go through JavaScript, and it's returning many suggestions to replace == (two equals signs) with === (three equals signs) when doing things like comparing idSele_UNVEHtype.value.length == 0 inside of an if statement.
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Struct like objects in Java
...in your tests. If you create a new class you might not see all possible actions. It's like defensive programming - someday getters and setters may be helpful, and it doesn't cost a lot to create/use them. So they are sometimes useful.
In practice, most fields have simple getters and setters. A poss...
Possible to make labels appear when hovering over a point in matplotlib?
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It seems none of the other answers here actually answer the question. So here is a code that uses a scatter and shows an annotation upon hovering over the scatter points.
import matplotlib.pyplot as plt
import numpy as np; np.random.seed(1)
x = np.random.rand(15)
y = np.random.rand(15)
n...
How do I determine the target architecture of static library (.a) on Mac OS X?
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Another option is lipo; its output is brief and more readable than otool's.
An example:
% lipo -info /usr/lib/libiodbc.a
Architectures in the fat file: /usr/lib/libiodbc.a are: x86_64 i386 ppc
% lipo -info libnonfatarchive.a
input fi...
Event system in Python
... trying to keep an overview of the above packages, plus the techniques mentioned in the answers here.
First, some terminology...
Observer pattern
The most basic style of event system is the 'bag of handler methods', which is a
simple implementation of the Observer pattern.
Basically, the handler met...
New Array from Index Range Swift
...th how you're declaring your array to begin with.
EDIT:
To fix your function, you have to cast your Slice to an array:
func aFunction(numbers: Array<Int>, position: Int) -> Array<Int> {
var newNumbers = Array(numbers[0..<position])
return newNumbers
}
// test
aFunction(...
Does “display:none” prevent an image from loading?
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Browsers are getting smarter. Today your browser (depending on the version) might skip the image loading if it can determine it's not useful.
The image has a display:none style but its size may be read by the script.
Chrome v68.0 does not load images if the parent is hidden.
You may check it ...
S3 Static Website Hosting Route All Paths to Index.html
...bucket, rather than just doing a full redirect. Then my javascript application could parse the URL and serve the proper page.
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MSTest copy file to test run folder
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use a DeploymentItem attribute
using System;
using System.IO;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using CarMaker;
namespace DeploymentTest
{
[TestClass]
public class UnitTest1
{
[TestMethod()]
[DeploymentItem("testFile1.xml")]
pub...
How to run travis-ci locally
...$RANDOM"
View the build log, open the show more button for WORKER INFORMATION and find the INSTANCE line, paste it in here and run (replace the tag after the colon with the newest available one):
INSTANCE="travisci/ci-garnet:packer-1512502276-986baf0"
Run the headless server
docker run --name $B...