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What's the best way to join on the same table twice?
...a fan of natural keys and this is a great example why. Natural keys, especially things like phone numbers, can change and frequently so. Updating your database when that change happens will be a HUGE, error-prone headache. *
Method 1 as you describe it is your best bet though. It looks a bit terse ...
Groovy: what's the purpose of “def” in “def x = 0”?
...e bindings for the current script and groovy treats it (mostly) like a globally scoped variable:
x = 1
assert x == 1
assert this.binding.getVariable("x") == 1
Using the def keyword instead does not put the variable in the scripts bindings:
def y = 2
assert y == 2
try {
this.binding.getVari...
What is the Invariant Culture?
... be read and written regardless of the culture the user has defined.
Basically it is a specific culture that is artificial and will not change.
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Control the size of points in an R scatterplot?
.... I'm making scatterplots with tens of thousands of points and prefer a small, but not too small dot. Basically, I find pch='.' to be too small, but pch=19 to be too fat. Is there something in the middle or some way to scale the dots down somehow?
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How to write one new line in Bitbucket markdown?
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I'd never do this because all text files should have stripped whitespace everywhere (except the trailing newline). Using meaningful space in this way is too implicit.
– AndiDog
Sep 4 '17 at 20:24
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How can I change the EditText text without triggering the Text Watcher?
... after update
et.addTextChangedListener(this);
}
}
Usage:
et_text.addTextChangedListener(new MyTextWatcher(et_text));
You may feel a little bit lag when entering text rapidly if you are using editText.setText() instead of editable.replace().
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Why does the C# compiler not fault code where a static method calls an instance method?
The following code has a static method, Foo() , calling an instance method, Bar() :
3 Answers
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Should 'using' directives be inside or outside the namespace?
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There is actually a (subtle) difference between the two. Imagine you have the following code in File1.cs:
// File1.cs
using System;
namespace Outer.Inner
{
class Foo
{
static void Bar()
{
double d = Ma...
Convert a list to a dictionary in Python
...ip(i, i))
In Python 3 you could also use a dict comprehension, but ironically I think the simplest way to do it will be with range() and len(), which would normally be a code smell.
b = {a[i]: a[i+1] for i in range(0, len(a), 2)}
So the iter()/izip() method is still probably the most Pythonic i...
Get the subdomain from a URL
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Anyone have any great ideas besides
storing a list of all TLDs?
No, because each TLD differs on what counts as a subdomain, second level domain, etc.
Keep in mind that there are top level domains, second level domains, and subdomains. Technically speaking, everything except ...