大约有 5,475 项符合查询结果（耗时：0.0179秒） [XML]
How to show Page Loading div until the page has finished loading?
...dd the style class for the div and image to your CSS:
#loading {
width: 100%;
height: 100%;
top: 0;
left: 0;
position: fixed;
display: block;
opacity: 0.7;
background-color: #fff;
z-index: 99;
text-align: center;
}
#loading-image {
position: absolute;
top: 100px;
left: 24...
How do you get the magnitude of a vector in Numpy?
...imeit.timeit('np.linalg.norm(x)', setup='import numpy as np; x = np.arange(100)', number=1000)
0.0450878
>>> timeit.timeit('np.sqrt(x.dot(x))', setup='import numpy as np; x = np.arange(100)', number=1000)
0.0181372
EDIT: The real speed improvement comes when you have to take the norm of m...
What are the options for storing hierarchical data in a relational database? [closed]
...ettle for one or the other especially if there are more than, say, a lousy 100,000 nodes or so. Using the push stack method can take a whole day to do the conversion on what MLM'ers would consider to be a small million node hierarchy.
I thought I'd give Celko a bit of competition by coming up with...
How much does it cost to develop an iPhone application? [closed]
...
1007
votes
I'm one of the developers for Twitterrific and to be honest, I can't tell ...
How to embed a SWF file in an HTML page?
...
<object width="100" height="100">
<param name="movie" value="file.swf">
<embed src="file.swf" width="100" height="100">
</embed>
</object>
...
Extract subset of key-value pairs from Python dictionary object?
...3.1-5)] on linux2
import numpy.random as nprnd
...: keys = nprnd.randint(100000, size=10000)
...: bigdict = dict([(_, nprnd.rand()) for _ in range(100000)])
...:
...: %timeit {key:bigdict[key] for key in keys}
...: %timeit dict((key, bigdict[key]) for key in keys)
...: %timeit dict(map(...
How to read a line from the console in C?
...t read. So you use fgetc:
char * getline(void) {
char * line = malloc(100), * linep = line;
size_t lenmax = 100, len = lenmax;
int c;
if(line == NULL)
return NULL;
for(;;) {
c = fgetc(stdin);
if(c == EOF)
break;
if(--len == 0) {
...
pandas DataFrame: replace nan values with average of columns
...ion from the test set into the training set! Imagine it like this: We have 100 data rows and we consider column x. The first 99 entries of x are NA. We want to split off row 100 as a test set. Let's assume row 100 has value 20 in column x. Then you will replace all entries in the training set in col...
Find a string by searching all tables in SQL Server Management Studio 2008
... to narrow the search scope
USE DATABASE_NAME
DECLARE @SearchStr nvarchar(100) = 'SEARCH_TEXT'
DECLARE @Results TABLE (ColumnName nvarchar(370), ColumnValue nvarchar(3630))
SET NOCOUNT ON
DECLARE @TableName nvarchar(256), @ColumnName nvarchar(128), @SearchStr2 nvarchar(110)
SET @TableName = ''
S...
How to customize user profile when using django-allauth
... what worked for me combining a few of the other answers (none of them are 100% complete and DRY).
In yourapp/forms.py:
from django.contrib.auth import get_user_model
from django import forms
class SignupForm(forms.ModelForm):
class Meta:
model = get_user_model()
fields = ['fi...