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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...
Export Data from mysql Workbench 6.0
...he begin of this line to comment it out
Save file and restart Workbench.
Tested on Windows 7 x64, MySQL 5.6.27 (MyISAM) & Workbench 6.3.5 x64.
Tested on OSX Yosemite 10.10.4, MySQL 5.5.27 (MyISAM), Workbench 6.3.5 build 201 CE x64.
...
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
...
How can I find all of the distinct file extensions in a folder hierarchy?
...file extension. Example: when we run from maindir it will fail for maindir/test.dir/myfile
– Nelson Teixeira
Apr 2 '17 at 5:52
1
...
What is the use of static variable in C#? When to use it? Why can't I declare the static variable in
... it static:
public class Variable
{
public int i = 5;
public void test()
{
i = i + 5;
Console.WriteLine(i);
}
}
public class Exercise
{
static void Main()
{
Variable var = new Variable();
var.test();
Variable var1 = new Variable();
...
Linux, Why can't I write even though I have group permissions?
...am user el
el
touch /foobar/test_file //make a new file
sudo chown root:www-data /foobar/test_file //User=root group=www-data
sudo chmod 474 /foobar/test_file //owner and others get only read,
...
Checking to see if one array's elements are in another array in PHP
...
Performance test for in_array vs array_intersect:
$a1 = array(2,4,8,11,12,13,14,15,16,17,18,19,20);
$a2 = array(3,20);
$intersect_times = array();
$in_array_times = array();
for($j = 0; $j < 10; $j++)
{
/***** TEST ONE array_in...
What is difference between Collection.stream().forEach() and Collection.forEach()?
...loop really often, this might still be of interest.
You should repeat this tests under the target system as this is implementation specific, (full source code).
I run openjdk version 1.8.0_111 on a fast Linux machine.
I wrote a test that loops 10^6 times over a List using this code with varying size...
Setting Environment Variables for Node to retrieve
...l pass the user id 239482 and the user key as foobar. This is suitable for testing, however for production, you will probably be configuring some bash scripts to export variables.
share
|
improve th...
Throw an error in a MySQL trigger
...on".
Here is a more complete example of the approach:
delimiter //
use test//
create table trigger_test
(
id int not null
)//
drop trigger if exists trg_trigger_test_ins //
create trigger trg_trigger_test_ins before insert on trigger_test
for each row
begin
declare msg varchar(128);
...