大约有 46,000 项符合查询结果（耗时：0.0538秒） [XML]
Converting numpy dtypes to native python types
...py as np
# for example, numpy.float32 -> python float
val = np.float32(0)
pyval = val.item()
print(type(pyval)) # <class 'float'>
# and similar...
type(np.float64(0).item()) # <class 'float'>
type(np.uint32(0).item()) # <class 'long'>
type(np.int16(0).item()) # <...
For i = 0, why is (i += i++) equal to 0?
...
This:
int i = 0;
i += i++
Can be seen as you doing (the following is a gross oversimplification):
int i = 0;
i = i + i; // i=0 because the ++ is a postfix operator and hasn't been executed
i + 1; // Note that you are discarding the calc...
When should I use Lazy?
I found this article about Lazy : Laziness in C# 4.0 – Lazy
7 Answers
7
...
Convert NaN to 0 in javascript
Is there a way to convert NaN values to 0 without an if statement:
11 Answers
11
...
Generate colors between red and green for a power meter?
...
203
This should work - just linearly scale the red and green values. Assuming your max red/green/bl...
Regular expression to match URLs in Java
...
106
Try the following regex string instead. Your test was probably done in a case-sensitive manner....
Trees in Twitter Bootstrap [closed]
...ee */
.tree {
.border-radius(@baseBorderRadius);
.box-shadow(inset 0 1px 1px rgba(0,0,0,.05));
background-color: lighten(@grayLighter, 5%);
border: 1px solid @grayLight;
margin-bottom: 10px;
max-height: 300px;
min-height: 20px;
overflow-y: auto;
padding: 19px;
...
How do you know what to test when writing unit tests? [closed]
...
edited May 23 '17 at 12:10
community wiki
2 re...
Automatically expanding an R factor into a collection of 1/0 indicator variables for every factor le
...vel, there is an associated column in a new data frame, which contains a 1/0 indicator. E.g., suppose I have:
8 Answers
...
How to check if a string is a valid hex color representation?
...
/^#[0-9A-F]{6}$/i.test('#AABBCC')
To elaborate:
^ -> match beginning
# -> a hash
[0-9A-F] -> any integer from 0 to 9 and any letter from A to F
{6} -> the previous group appears exactly 6...