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Why should text files end with a newline?
... puts each file’s start on a new line, which is what you want 95% of the time; but
it allows merging the last and first line of two files, as in the example above between b.txt and c.txt?
Of course this is solvable but you need to make the usage of cat more complex (by adding positional command ...
Regex doesn't work in String.matches()
...and end up on this SO answer realising that you've already upvoted it long time ago...
– matewka
1 hour ago
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CSS background opacity with rgba not working in IE 8
...erybody, but it's worth considering in some cases, since it saves a lot of time and works flawlessly. Hope that helps somebody!
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How to insert a character in a string at a certain position?
...I wasn't taking the precedence into account, mostly because the very first time he ran it it'd give him the truncated result. Will fix the post (which used to say 12345/100, then cast the result, instead of widening the value first.)
– Joseph Ottinger
May 5 '11...
How to execute XPath one-liners from shell?
... and it's really neat. But I will probably have use for your solution from time to time.
– clacke
May 14 '14 at 14:59
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Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...t( string, array )
实例：
$ awk '{ split( "20:18:00", time, ":" ); print time[2] }'
上例把时间按冒号分割到time数组内，并显示第二个数组元素18。
14.8.2. 时间函数
systime函数返回从1970年1月1日开始到当前时间(...
Passing a String by Reference in Java?
... faster that s += "..." since it doesn't allocate new String objects every time. In fact when you write Java code like s = "Hello " + name, then the compiler will generate byte code which creates a StringBuilder and calls append() two times.
– Aaron Digulla
May...
How to remove specific elements in a numpy array
...y since array scalars are immutable, similar to strings in Python, so each time a change is made to it, a new object is created. I.e., to quote the delete() docs:
"A copy of arr with the elements specified by obj removed. Note that
delete does not occur in-place..."
If the code I post has ou...
How to change a nullable column to not nullable in a Rails migration?
...there are null rows in that database? I'm ok with setting those columns to Time.now if they're currently null.
8 Answers
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pyplot scatter plot marker size
...d to use 'scatter' initially for this purpose. After quite a bit of wasted time - I settled on the following solution.
import matplotlib.pyplot as plt
input_list = [{'x':100,'y':200,'radius':50, 'color':(0.1,0.2,0.3)}]
output_list = []
for point in input_list:
output_list.append(plt.Circ...