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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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What is the simplest way to convert a Java string from all caps (words separated by underscores) to
...What's the simplest/most elegant way that I can convert, in Java, a string from the format "THIS_IS_AN_EXAMPLE_STRING" to the format " ThisIsAnExampleString "? I figure there must be at least one way to do it using String.replaceAll() and a regex.
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How would you make a comma-separated string from a list of strings?
What would be your preferred way to concatenate strings from a sequence such that between every two consecutive pairs a comma is added. That is, how do you map, for instance, ['a', 'b', 'c'] to 'a,b,c' ? (The cases ['s'] and [] should be mapped to 's' and '' , respectively.)
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Each for object? [duplicate]
...this:
1 . You want to check whether the attribute that you are finding is from the object itself and not from up the prototype chain. This can be checked with the hasOwnProperty function like so
for(var index in object) {
if (object.hasOwnProperty(index)) {
var attr = object[index];
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When is -XAllowAmbiguousTypes appropriate?
...int is using functional dependencies to infer the otherwise-ambiguous type from other non-ambiguous types. So let's compare the contexts of the two functions and look for functional dependencies.
class ApplySym sig f sym | sig sym -> f, f -> sig sym
class SyntacticN f internal | f -> inter...
make iframe height dynamic based on content inside- JQUERY/Javascript
...d a situation a while ago where I additionally needed to call iframeLoaded from the IFRAME itself after a form-submission occurred within. You can accomplish that by doing the following within the IFRAME's content scripts:
parent.iframeLoaded();
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How to tell whether a point is to the right or left side of a line
...n imaginary line between them. Now I want to have all points that are left from this line in one set and those that are right from this line in the other set.
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DTO and DAO concepts and MVC [closed]
...or your frame in a separate class and dispatch messages to this controller from the event handlers.
This would separate your business logic from the view.
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Batch file. Delete all files and folders in a directory
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Just want to add a note to the comment from Bill_Stewart . The reason you want to make sure that the directory exists is that otherwise, it will clear whatever directory you are currently in. In my case, it was the batch file I had been working on for over 30 mi...
SVN best-practices - working in a team
...h, you are expected as a good dev to do your job and to UPDATE your branch from trunk and merge latest changes from trunk to your branch DAILY or several times a day (your choice) so that in the end you don't have merge hell that has piled up. I have at least 4-5 branches going on all the time loca...