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Why does instanceof return false for some literals?
... // true
As you can see both typeof and instanceof are insufficient to test whether a value is a boolean, a number or a string - typeof only works for primitive booleans, numbers and strings; and instanceof doesn't work for primitive booleans, numbers and strings.
Fortunately there's a simple s...
Best way to check if a URL is valid
...l('/'); // for my case https://www.xrepeater.com
$posted_url = "home";
// Test with one by one
/*$posted_url = "/home";
$posted_url = "xrepeater.com";
$posted_url = "www.xrepeater.com";
$posted_url = "http://www.xrepeater.com";
$posted_url = "https://www.xrepeater.com";
$posted_url = "https:/...
C++ Tuple vs Struct
... collected using gcc-4.9.2 and clang-4.0.0:
std::vector<StructData> test_struct_data(const size_t N) {
std::vector<StructData> data(N);
std::transform(data.begin(), data.end(), data.begin(), [N](auto item) {
std::random_device rd;
std::mt19937 gen(rd());
...
Request is not available in this context
...ption occurs in the logger (even if handled).
It appears that rather than testing for Request availability, you can test for Handler availability: when there is no Request, it would be strange to still have a request handler. And testing for Handler does not raise that dreaded Request is not availa...
For-each over an array in JavaScript
...erty(key) && // These checks are
/^0$|^[1-9]\d*$/.test(key) && // explained
key <= 4294967294 // below
) {
console.log(a[key]);
}
}
Note the three checks:
That the object has its own property by that name...
Creating instance of type without default constructor in C# using reflection
...ctor and digging through some of the core .Net serialization classes.
I tested it using the sample code below and it looks like it works great:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using System.Runtime.Serialization;
name...
Logging uncaught exceptions in Python
...
Anyone trying to test the above code, make sure that you generate a traceback error while testing your function. SyntaxError are not being handled by sys.excepthook. You can use print(1/0) and this shall invoke the function you have defined t...
Replace whole line containing a string using Sed
...>.*/<expression>SE_LABEL = ABC<expression>/g' MYR2.xml > test.txt
– Nasri Najib
Oct 24 '14 at 7:46
...
Why is Hibernate Open Session in View considered a bad practice?
... by the service layer and by the UI rendering process. Writing integration tests that assert the number of statements being generated requires going through all layers (web, service, DAO), while having the application deployed on a web container. Even when using an in-memory database (e.g. HSQLDB) a...
Project structure for Google App Engine
... by App Engine
myapp/*.py: app-specific python code
views.py, models.py, tests.py, __init__.py, and more
templates/*.html: templates (or myapp/templates/*.html)
Here are some code examples that may help as well:
main.py
import wsgiref.handlers
from google.appengine.ext import webapp
from mya...