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micro:bit 实验08 - 摇一摇与倾斜检测 · App Inventor 2 中文网
...高度 300、背景浅灰
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Microbit_Accelerometer
Mi...
How to avoid .pyc files?
...terpreter. This setting is available
to Python programs as the
sys.dont_write_bytecode variable, and
Python code can change the value to
modify the interpreter’s behaviour.
Update 2010-11-27: Python 3.2 addresses the issue of cluttering source folders with .pyc files by introducing a spe...
How to use timeit module
... you defined earlier during the interactive session by importing them from __main__ in the setup statement:
>>> def f(x):
... return x * x
...
>>> import timeit
>>> timeit.repeat("for x in range(100): f(x)", "from __main__ import f",
number=100000)...
how to return index of a sorted list? [duplicate]
...ray([2,3,1,4,5])
>>> vals
array([2, 3, 1, 4, 5])
>>> sort_index = numpy.argsort(vals)
>>> sort_index
array([2, 0, 1, 3, 4])
If not available, taken from this question, this is the fastest method:
>>> vals = [2,3,1,4,5]
>>> sorted(range(len(vals)), key=...
Can I use Objective-C blocks as properties?
... I didn't know that, thanks! ... Although I often do @synthesize myProp = _myProp
– Robert
Nov 8 '12 at 8:04
...
Equals(=) vs. LIKE
...the = comparison operator:
mysql> SELECT 'ä' LIKE 'ae' COLLATE latin1_german2_ci;
+-----------------------------------------+
| 'ä' LIKE 'ae' COLLATE latin1_german2_ci |
+-----------------------------------------+
| 0 |
+----------------------------------...
Recommended way of making React component/div draggable
...;
return result;
};
class Draggable extends React.PureComponent {
_relX = 0;
_relY = 0;
_ref = React.createRef();
_onMouseDown = (event) => {
if (event.button !== 0) {
return;
}
const {scrollLeft, scrollTop, clientLeft, clientTop} = docume...
How do you create different variable names while in a loop? [duplicate]
...can do this is with exec(). For example:
for k in range(5):
exec(f'cat_{k} = k*2')
>>> print(cat_0)
0
>>> print(cat_1)
2
>>> print(cat_2)
4
>>> print(cat_3)
6
>>> print(cat_4)
8
Here I am taking advantage of the handy f string formatting in Pytho...
CSS table layout: why does table-row not accept a margin?
...e;
border-spacing: 15px;
}
.row {
display: table-row;
}
.home_1 {
width: 64px;
height: 64px;
padding-right: 20px;
margin-right: 10px;
display: table-cell;
}
.home_2 {
width: 350px;
height: 64px;
padding: 0px;
vertical-align: middle;
font-size: 150%;
...
Linux - Replacing spaces in the file names
...
This should do it:
for file in *; do mv "$file" `echo $file | tr ' ' '_'` ; done
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