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How to read a .xlsx file using the pandas Library in iPython?
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Update: In pandas version 0.21.0+ you will get this behavior more cleanly by passing sheet_name=None to read_excel:
dfs = pd.read_excel(file_name, sheet_name=None)
In 0.20 and prior, this was sheetname rather than sheet_name (this is now deprecated in favor of the above):
dfs = pd.read_excel(...
When to use , tag files, composite components and/or custom components?
I started using JSF 2.0 with Facelets recently and got puzzled by new composite components knowing existing <ui:include> and other templating techniques offered by Facelets 1.x.
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How to count the number of occurrences of an element in a List
...<String, Long> counts =
list.stream().collect(Collectors.groupingBy(e -> e, Collectors.counting()));
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What Makes a Good Unit Test? [closed]
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Let me begin by plugging sources - Pragmatic Unit Testing in Java with JUnit (There's a version with C#-Nunit too.. but I have this one.. its agnostic for the most part. Recommended.)
Good Tests should be A TRIP (The acronymn isn't stick...
Installing pip packages to $HOME folder
... This looks very insteresting. easy_install comes installed in Mac OS X by default, so I would have only pip installed outside the $HOME folder.
– Somebody still uses you MS-DOS
Aug 22 '11 at 14:08
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Timer & TimerTask versus Thread + sleep in Java
...utor we can configure any number of threads and can also have full control by providing ThreadFactory.
Timer can be sensitive to system clock as it makes use of Object.wait(long) method. But ScheduledThreadPoolExecutor is not.
Runtime exceptions thrown in TimerTask will kill that particular thread, ...
Ruby on Rails production log rotation
What is the best way to enable log rotation on a Ruby on Rails production app?
6 Answers
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What's the difference between ConcurrentHashMap and Collections.synchronizedMap(Map)?
I have a Map which is to be modified by several threads concurrently.
19 Answers
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MongoDB: Is it possible to make a case-insensitive query?
...earching with regex's case insensitive /i means that mongodb cannot search by index, so queries against large datasets can take a long time.
Even with small datasets, it's not very efficient. You take a far bigger cpu hit than your query warrants, which could become an issue if you are trying to...
Quick-and-dirty way to ensure only one instance of a shell script is running at a time
...yscript.exclusivelock
This ensures that code between ( and ) is run only by one process at a time and that the process doesn’t wait too long for a lock.
Caveat: this particular command is a part of util-linux. If you run an operating system other than Linux, it may or may not be available.
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