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How can I read large text files in Python, line by line, without loading it into memory?
...n infile" will load my 5GB of lines in to the memory? and, How can I read from tail?
– Bruno Rocha - rochacbruno
Jun 25 '11 at 2:31
70
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Check whether a string is not null and not empty
... && fails, thus ensuring you will not get a null pointer exception from str.isEmpty() if str is null.
Beware, it's only available since Java SE 1.6. You have to check str.length() == 0 on previous versions.
To ignore whitespace as well:
if(str != null && !str.trim().isEmpty())
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Best Timer for using in a Windows service
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// KeepAlive must be used to prevent the JIT compiler
// from allowing aggressive garbage collection to occur
// before the method ends. (See end of method.)
//System.Timers.Timer aTimer;
// Create a timer with a ten second interval.
aTimer = new S...
How do I get the path of a process in Unix / Linux
...
This is awesome. I knew I ran it from a location which had the symbolic link to the original executable (one of the many versions). pwdx <PID> gave me the location of the symbolic link so I could find the logs and stop the process in proper way.
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What is context in _.each(list, iterator, [context])?
...ame Array as "someOtherArray"
alert( this[num] ); // num is the value from the array being iterated
// so this[num] gets the item at the "num" index of
// someOtherArray.
}, someOtherArray);
Working Example: http://jsfiddle.net/a6Rx4/
It ...
How do you declare an interface in C++?
... It would still be nice to be able to create interfaces, to save us from typing so much (virtual , =0, virtual destructor). Also multiple inheritance seems like a really bad idea to me and I've never seen it used in practice, but interfaces are needed all the time. To bad the C++ comity won't...
How to choose between Hudson and Jenkins? [closed]
... no interest in Gradle and Artifactory etc)
professional support offerings from Sonatype or maybe Oracle in preference to Cloudbees etc
you don't mind having a smaller community of plugin developers etc.
, then I would suggest Hudson.
Conversely, if you prefer:
more frequent updates, even if th...
How would you go about parsing Markdown? [closed]
...nternal use by Mauricio himself for his weblog, there are a few deviations from the official Markdown specification, but Mauricio has created a branch which reverts most of those changes.
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im...
When and why to 'return false' in JavaScript?
...return false;">...
The 'return false;' in this case stops the browser from jumping to the current location, as indicated by the href="#" - instead, only doSomeFunction() is executed. It's useful for when you want to add events to anchor tags, but don't want the browser jumping up and down to e...
Why should I use Hamcrest-Matcher and assertThat() instead of traditional assertXXX()-Methods
...easier to read, but once the assert fails, you'll get a good error message from assertThat, but only a very minimal amount of information from assertTrue.
assertThat will tell you what the assertion was and what you got instead. assertTrue will only tell you that you got false where you expected tr...