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Reading a huge .csv file
I'm currently trying to read data from .csv files in Python 2.7 with up to 1 million rows, and 200 columns (files range from 100mb to 1.6gb). I can do this (very slowly) for the files with under 300,000 rows, but once I go above that I get memory errors. My code looks like this:
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Refresh all files in buffer from disk in vim
The command to refresh a file from version on disk is :e!
5 Answers
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Array or List in Java. Which is faster?
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@Fortyrunner - From your experience, are there any such choices in Java between abstraction and raw data forms that do make a significant difference in performance ?
– euphoria83
Apr 4 '09 at 17:53
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Is it expensive to use try-catch blocks even if an exception is never thrown?
... stack and seeing if any try blocks exist that would catch this exception. From a layman's perspective, try may as well be free. It's actually throwing the exception that costs you - but unless you're throwing hundreds or thousands of exceptions, you still won't notice the cost.
try has some mino...
What is a fat JAR? [duplicate]
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The fat jar is the jar, which contains classes from all the libraries, on which your project depends and, of course, the classes of current project.
In different build systems fat jar is created differently, for example, in Gradle one would create it with (instruction):
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What is a “thread” (really)?
...a break right now, but you want to be able to come back and resume reading from the exact point where you stopped. One way to achieve that is by jotting down the page number, line number, and word number. So your execution context for reading a book is these 3 numbers.
If you have a roommate, and s...
Generating a Random Number between 1 and 10 Java [duplicate]
...and the specified value (exclusive)". This means that you will get numbers from 0 to 9 in your case. So you've done everything correctly by adding one to that number.
Generally speaking, if you need to generate numbers from min to max (including both), you write
random.nextInt(max - min + 1) + min...
On logout, clear Activity history stack, preventing “back” button from opening logged-in-only Activi
...n my application require a user to be logged-in to view. Users can log out from almost any activity. This is a requirement of the application. At any point if the user logs-out, I want to send the user to the Login Activity . At this point I want this activity to be at the bottom of the history sta...
How to set environment variable for everyone under my linux system?
... zsh will source .sh files in /etc/profile.d/, you can see it from /etc/zshrc @Matthieu Napoli
– Bily
Jul 24 '14 at 8:45
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Get int value from enum in C#
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On a related note, if you want to get the int value from System.Enum, then given e here:
Enum e = Question.Role;
You can use:
int i = Convert.ToInt32(e);
int i = (int)(object)e;
int i = (int)Enum.Parse(e.GetType(), e.ToString());
int i = (int)Enum.ToObject(e.GetType(), e);...