大约有 40,000 项符合查询结果（耗时：0.0476秒） [XML]
What are bitwise operators?
...t's own bit in a bitset (byte, short, int, or long). For example:
Read: 00000001
Write: 00000010
So if you want to pass read AND write, you would pass (READ | WRITE) which then combines the two into
00000011
Which then can be decrypted on the other end like:
if ((flag & Read) != 0) { /...
Can I set background image and opacity in the same property?
...
Two methods:
Convert to PNG and make the original image 0.2 opacity
(Better method) have a <div> that is position: absolute; before #main and the same height as #main, then apply the background-image and opacity: 0.2; filter: alpha(opacity=20);.
...
Adding new column to existing DataFrame in Python pandas
...
1091
Use the original df1 indexes to create the series:
df1['e'] = pd.Series(np.random.randn(sLeng...
Adding a column to a data.frame
...p <- as.factor(your.df$group)
no h_freq h_freqsq group
1 1 0.40998238 0.06463876 1
2 2 0.98086928 0.33093795 1
3 3 0.28908651 0.74077119 1
4 4 0.10476768 0.56784786 1
5 1 0.75478995 0.60479945 2
6 2 0.26974011 0.95231761 2
7 3 0.53676266 0.74370154...
Configure Flask dev server to be visible across the network
...s is Flask specific, but when I run an app in dev mode ( http://localhost:5000 ), I cannot access it from other machines on the network (with http://[dev-host-ip]:5000 ). With Rails in dev mode, for example, it works fine. I couldn't find any docs regarding the Flask dev server configuration. Any i...
How to drop rows of Pandas DataFrame whose value in a certain column is NaN
...
AMC
2,22966 gold badges1010 silver badges2828 bronze badges
answered Nov 16 '12 at 9:34
eumiroeumiro
1...
How does Dijkstra's Algorithm and A-Star compare?
...
answered Aug 26 '09 at 5:18
leizleiz
3,63622 gold badges2020 silver badges1616 bronze badges
...
How to change the output color of echo in Linux
...
30 Answers
30
Active
...
Extracting specific columns in numpy array
... |
edited Aug 23 at 10:39
cs95
231k6060 gold badges391391 silver badges456456 bronze badges
answere...
Programmatically Lighten or Darken a hex color (or rgb, and blend colors)
...nt. Just pass in a string like "3F6D2A" for the color ( col ) and a base10 integer ( amt ) for the amount to lighten or darken. To darken, pass in a negative number (i.e. -20 ).
...