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What are good uses for Python3's “Function Annotations”
...used for pre-condition checking:
def validate(func, locals):
for var, test in func.__annotations__.items():
value = locals[var]
msg = 'Var: {0}\tValue: {1}\tTest: {2.__name__}'.format(var, value, test)
assert test(value), msg
def is_int(x):
return isinstance(x, int...
How to access object attribute given string corresponding to name of that attribute
...
and hasattr for testing whether or not an object has a specific attr though in that case using the three argument form getattr(object, attrname, default) is often better.
– Duncan
Apr 10 '10 at 11:20
...
Disable assertions in Python
...
Call Python with the -O flag:
test.py:
assert(False)
print 'Done'
Output:
C:\temp\py>C:\Python26\python.exe test.py
Traceback (most recent call last):
File "test.py", line 1, in <module>
assert(False)
AssertionError
C:\temp\py>C:\Py...
How to get element by class name? [duplicate]
...entsByClassName
suppose you have some elements and applied a class name 'test', so, you can get elements like as following
var tests = document.getElementsByClassName('test');
its returns an instance NodeList, or its superset: HTMLCollection (FF).
Read more
...
“To Do” list before publishing Android app to market [closed]
...stack traces) that happens on the user side.
Ask your friends to do monkey tests, learning from users usually brings many good things (such as priorities and new ideas).
Consider publishing your app before having finished all features (most important feature only), you don't already know what your u...
C# How can I check if a URL exists/is valid?
...this before!; changed to wiki to avoid accusations of rep-garnering. So to test a URL without the cost of downloading the content:
// using MyClient from linked post
using(var client = new MyClient()) {
client.HeadOnly = true;
// fine, no content downloaded
string s1 = client.DownloadSt...
How do I import other TypeScript files?
...dule loading you have to do the following:
moo.ts
export class foo {
test: number;
}
app.ts
import moo = module('moo');
class bar extends moo.foo {
test2: number;
}
Note the different way of brining the code into scope. With external modules, you have to use module with the name of the...
Repeat String - Javascript
...
I've tested the performance of all the proposed approaches.
Here is the fastest variant I've got.
String.prototype.repeat = function(count) {
if (count < 1) return '';
var result = '', pattern = this.valueOf();
wh...
Which MySQL data type to use for storing boolean values
...
@Walter: This is easy to test, e.g SELECT 'foo' AS bar FROM dual WHERE -7. The expression -7 is evaluated in a boolean context, and the query returns a row. We can test with 0, or any expression that evaluates to integer value 0, and no row is retu...
How do you use an identity file with rsync?
...z -e "ssh -p1234 -i /home/username/.ssh/1234-identity" dir user@server:
Tested with rsync 3.0.9 on Ubuntu
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