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Shell command to sum integers, one per line?
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I have a file with 100 million numbers. The awk command takes 21s; the paste command takes 41s. But good to meet 'paste' nevertheless!
– Abhi
Jan 25 '13 at 6:07
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Get a filtered list of files in a directory
...lob
Wild Cards:
files=glob.glob("data/*")
print(files)
Out:
['data/ks_10000_0', 'data/ks_1000_0', 'data/ks_100_0', 'data/ks_100_1',
'data/ks_100_2', 'data/ks_106_0', 'data/ks_19_0', 'data/ks_200_0', 'data/ks_200_1',
'data/ks_300_0', 'data/ks_30_0', 'data/ks_400_0', 'data/ks_40_0', 'data/ks_45_...
Detect and exclude outliers in Pandas data frame
...g expression would do that in one shot.
df = pd.DataFrame(np.random.randn(100, 3))
from scipy import stats
df[(np.abs(stats.zscore(df)) < 3).all(axis=1)]
description:
For each column, first it computes the Z-score of each value in the
column, relative to the column mean and standard deviati...
How do I check if a string is valid JSON in Python?
...s_json("{asdf}") #prints False
print is_json('{ "age":100}') #prints True
print is_json("{'age':100 }") #prints False
print is_json("{\"age\":100 }") #prints True
print is_json('{"age":100 }') #prints True
print is_json('...
ipython: print complete history (not just current session)
...e.history.HistoryAccessor(profile='default')
profile_hist.get_session_info(100)
This will print out something like
(100, datetime.datetime(2018, 2, 13, 19, 8, 30, 40691), None, None, '')
This means that the session 100 started on the 13th of Feb 2018 19:08:30.
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Does SVG support embedding of bitmap images?
...k="http://www.w3.org/1999/xlink">
...
<image
width="100" height="100"
xlink:href="data:image/png;base64,IMAGE_DATA"
/>
...
</svg>
The svg element attribute xmlns:xlink declares xlink as a namespace prefix and says where the definition is. That the...
Does ruby have real multithreading?
...reads.rb
38293 0.0 S 33T 0:00.00 0:00.00
38293 100.0 R 31T 0:00.04 0:21.92
38293 100.0 R 31T 0:00.04 0:21.95
38293 100.0 R 31T 0:00.04 0:21.99
Once again, the same program but now with the good old MRI. Due to the fact that t...
FloatingActionButton 扩展：悬浮操作按钮扩展，可自定义颜色、大小、位置...
... 菜单展开 = false 则
调用 CreateFab 创建按钮 位置X为100 位置Y为500 大小为40
调用 CreateFab 创建按钮 位置X为100 位置Y为560 大小为40
设置 菜单展开 为 true
否则
调用 HideFAB 隐藏所有生成的按钮
设置 菜...
Why does InetAddress.isReachable return false, when I can ping the IP address?
... for (InetAddress address : addresses) {
if (address.isReachable(10000))
{
System.out.println("Connected "+ address);
}
else
{
System.out.println("Failed "+address);
}
}
//output:*Failed www.google.com/74.125....
What's the “average” requests per second for a production web application?
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Wikipedia seems to be 30000 to 70000 per second spread over 300 servers (100 to 200 requests per second per machine, most of which is caches)
Geograph is getting 7000 images per week (1 upload per 95 seconds)
share
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