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get just the integer from wc in bash
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You can use the cut command to get just the first word of wc's output (which is the line or word count):
lines=`wc -l $f | cut -f1 -d' '`
words=`wc -w $f | cut -f1 -d' '`
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Impossible to make a cached thread pool with a size limit?
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The ThreadPoolExecutor has the following several key behaviors, and your problems can be explained by these behaviors.
When tasks are submitted,
If the thread pool has not reached the core size, it creates new threads.
If the core size has be...
Is Zookeeper a must for Kafka?
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Yes, Zookeeper is required for running Kafka. From the Kafka Getting Started documentation:
Step 2: Start the server
Kafka uses zookeeper so you need to first start a zookeeper server if
you don't already have one. You can use the convenience...
How to compare times in Python?
...to check if the current time ( datetime.datetime.now() ) is earlier, later or the same than a specified time (e.g. 8am) regardless of the date.
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Is it possible to adjust x,y position for titleLabel of UIButton?
Is it possible to adjust the x,y position for the titleLabel of a UIButton ?
4 Answers
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What is the difference between gsub and sub methods for Ruby Strings
I have been perusing the documentation for String today, and I saw the :sub method, which I'd never noticed before. I've been using :gsub and it appears that they are essentially the same. Can anyone explain the difference to me? Thanks!
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Spring 3 MVC accessing HttpRequest from controller
...on attributes myself rather then leave it to spring @SessionAttributes , for login of cookies handling for example.
3 Ans...
Extracting .jar file with command line
...r xf myFile.jar foo bar
The folder where jar is probably isn't C:\Java for you, on my Windows partition it's:
C:\Program Files (x86)\Java\jdk[some_version_here]\bin
Unless the location of jar is in your path environment variable, you'll have to specify the full path/run the program from inside...
How do you build a Singleton in Dart?
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Thanks to Dart's factory constructors, it's easy to build a singleton:
class Singleton {
static final Singleton _singleton = Singleton._internal();
factory Singleton() {
return _singleton;
}
Singleton._internal();
}
You can const...
Could not reliably determine the server's fully qualified domain name
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Yes, you should set ServerName:
http://wiki.apache.org/httpd/CouldNotDetermineServerName
http://httpd.apache.org/docs/current/mod/core.html#servername
You can find information on the layouts used by the various httpd distributions here:
http://wiki.apache.org/httpd/Distros...