大约有 48,000 项符合查询结果(耗时:0.0650秒) [XML]
How do you convert a DataTable into a generic list?
...(DateTime )); for(int i=0;i<=1000;i++){dt.Rows.Add(i, "foo", DateTime.Now);}
– Rahul Garg
Jul 25 '18 at 10:56
...
CSS @font-face - what does “src: local('☺')” mean?
...excerpt from his blog post:
And.. regarding @font-face syntax
I now recommend the bulletproof smiley variation over the original bulletproof syntax.
@font-face {
font-family: 'Graublau Web';
src: url('GraublauWeb.eot');
src: local('☺'),
url('GraublauWeb.woff') format('woff...
How to write header row with csv.DictWriter?
...f writing the header row.
Simple example of using the writeheader() method now available in 2.7 / 3.2:
from collections import OrderedDict
ordered_fieldnames = OrderedDict([('field1',None),('field2',None)])
with open(outfile,'wb') as fou:
dw = csv.DictWriter(fou, delimiter='\t', fieldnames=orde...
Transport endpoint is not connected
... This doesn't exactly fix it but I guess it's the best answer for now.
– Alexis Tyler
Oct 1 '14 at 8:49
3
...
What is an unsigned char?
...2-bit chars, and 32-bit integers, and have sizeof(int) != sizeof(char)? I know the standard says sizeof(char) == 1, but is the relative sizeof(int) based on actual difference in size or the difference in range?
– Joseph Garvin
Jan 11 '09 at 23:21
...
How to fast-forward a branch to head?
...
I don't know if the origin/master portion is required or if it sensibly defaults, but I found it useful to make an alias for fast forward so I wanted to make sure the upstream branch is used instead of hard coding it to origin/master:...
Fastest way to serialize and deserialize .NET objects
... G'day Marc, love the protocol-buffers work you've done and I know this post is almost 5yrs old but the netserializer quoted in an answer here (Binoj) has metrics indicating your implementation isn't the fastest. Is that a fair statement/advertisement or is there a trade off? thanks
...
Pandas percentage of total with groupby
...r
19 s ± 77.1 ms per loop
(mean ± std. dev. of 7 runs, 1 loop each)
So now we see x10 speed up on large, high cardinality datasets.
Be sure to UV these three answers if you UV this one!!
share
|
...
Eclipse error: 'Failed to create the Java Virtual Machine'
... any other text-editor application, Find the line -Xmx256m (or -Xmx1024m). Now change the default value 256m (or 1024m) to 512m. You also need to give the exact java installed version (1.6 or 1.7 or other).
Like This:
-Xmx512m
-Dosgi.requiredJavaVersion=1.6
OR
-Xmx512m
-Dosgi.requiredJavaVers...
How to un-commit last un-pushed git commit without losing the changes
...t those changes are still visible in the history)
git push origin master
now if you want to have those changes as you local changes in your working copy ("so that your local copy keeps the changes made in that commit") - just revert the revert commit with --no-commit option:
git revert --no-commi...
