大约有 46,000 项符合查询结果(耗时:0.0520秒) [XML]
Make Div overlay ENTIRE page (not just viewport)?
...nd why this is so hard to do... I've tried setting body, html heights to 100% etc but that isn't working. Here is what I have so far:
...
pandas read_csv and filter columns with usecols
...andas as pd
from StringIO import StringIO
csv = r"""dummy,date,loc,x
bar,20090101,a,1
bar,20090102,a,3
bar,20090103,a,5
bar,20090101,b,1
bar,20090102,b,3
bar,20090103,b,5"""
df = pd.read_csv(StringIO(csv),
header=0,
index_col=["date", "loc"],
usecols=["date", "loc", "x"],
...
How do I create a random alpha-numeric string in C++?
...
+100
Mehrdad Afshari's answer would do the trick, but I found it a bit too verbose for this simple task. Look-up tables can sometimes do w...
How does a garbage collector avoid an infinite loop here?
...
110
As per Richter in the second edition of CLR via C# (yes I need to update):
Page 478
For (Th...
JSON left out Infinity and NaN; JSON status in ECMAScript?
...
|
edited Sep 18 '09 at 3:40
answered Sep 14 '09 at 21:34
...
String comparison using '==' vs. 'strcmp()'
...
The reason to use it is because strcmp
returns < 0 if str1 is less than str2; > 0 if str1 is greater than str2, and 0 if they are equal.
=== only returns true or false, it doesn't tell you which is the "greater" string.
...
How to convert ‘false’ to 0 and ‘true’ to 1 in Python
... to convert true of type unicode to 1 and false of type unicode to 0 (in Python)?
7 Answers
...
Is there a version of JavaScript's String.indexOf() that allows for regular expressions?
...
130
Combining a few of the approaches already mentioned (the indexOf is obviously rather simple), I ...
How to position a div in the middle of the screen when the page is bigger than the screen
...it at http://jsfiddle.net/XEUbc/1/
#mydiv {
position:fixed;
top: 50%;
left: 50%;
width:30em;
height:18em;
margin-top: -9em; /*set to a negative number 1/2 of your height*/
margin-left: -15em; /*set to a negative number 1/2 of your width*/
border: 1px solid #ccc;
...
Cosine Similarity between 2 Number Lists
...
180
You should try SciPy. It has a bunch of useful scientific routines for example, "routines for co...