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Explaining Apache ZooKeeper
I am trying to understand ZooKeeper, how it works and what it does. Is there any application which is comparable to ZooKeeper?
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How can I lock a file using java (if possible)
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FileChannel.lock is probably what you want.
try (
FileInputStream in = new FileInputStream(file);
java.nio.channels.FileLock lock = in.getChannel().lock();
Reader reader = new InputStreamReader(in, charset)
) {
...
}
(Disclaimer: Code ...
How to drop rows of Pandas DataFrame whose value in a certain column is NaN
...olumn_name']). Hope that saves at least one person the extra 5 seconds of 'what am I doing wrong'. Great answer, +1
– James Tobin
Jun 18 '14 at 14:07
10
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How to create a file in Linux from terminal window? [closed]
What's the easiest way to create a file in Linux terminal?
17 Answers
17
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How to use SVN, Branch? Tag? Trunk?
... of the product, so you plant a flag in the path labelled '1' (or '1.0' or what have you). At some other time some bright spark decides to parallelise the program, but decides that that will take weeks and that people want to keep going down the main path in the meantime. So you build a fork in th...
PHP: How to remove all non printable characters in a string?
...$string = preg_replace('/[\x00-\x1F\x7F\xA0]/u', '', $string);
Addendum: What about str_replace?
preg_replace is pretty efficient, but if you're doing this operation a lot, you could build an array of chars you want to remove, and use str_replace as noted by mgutt below, e.g.
//build an array we...
Git Pull While Ignoring Local Changes?
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What if you cannot possibly not have a local change vs head? E.g. the repo was made on a case sensitive file system and is cloned on a case insensitive file system and there's 2 files with same name different casing?
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What's so bad about in-line CSS?
...your styles inline the quick and dirty and un-maintainable way, you can do what I do these days and take a staged approach.
No inline style attribute
Never create your css inline, by which I mean: <element style='color:red'> or even <img style='float:right'> It's very convenient, bu...
What does `m_` variable prefix mean?
I often see m_ prefix used for variables ( m_World , m_Sprites ,...) in tutorials, examples and other code mainly related to game development.
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Setting different color for each series in scatter plot on matplotlib
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I don't know what you mean by 'manually'. You can choose a colourmap and make a colour array easily enough:
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.cm as cm
x = np.arange(10)
ys = [i+x+(i*x)**2 for i in rang...