Principal Software Engineer/Architect, motorcyclist, drummer, and artist
Here is a quick one-liner for trimming a specific number of characters from the end of a string under bash:
# Remove the last 5 characters
$ echo "somestringwith12345" | sed "s/.....$//g"
$ somestringwith
# Remove the last 3 characters
$ echo "somestringwith12345" | sed "s/...$//g"
$ somestringwith12If you want to run multiple versions of Notepad++ under Windows 7 create a .bat file with the following:
"C:\Program Files (x86)\Notepad++\notepad++.exe" -multiInst %1And simply run the bat file via a cmd prompt/ → Continue reading “Running Multiple Instances of Notepad++ Under Windows 7”
About a year ago I posted an article about how to split into an array of values based on a given delimiter in bash.
The following is how to take that same string and split it on the first occurrence of the same user defined delimiter.
Both use the ‘read’ command, but in a slightly different way.
Instead of passing read the -a [aname] parameter which tells it that “The words are assigned to sequential indices of the array → Continue reading “Splitting a String in Bash on the FIRST Occurrence of a Character”
Often times you will want to write a BASH script where you don’t want to have to keep track of all of the positional command line arguments and/or you might want to configure it with a set of environmental variables while having a default value for each in the script.
Following is the syntax for declaring them in the shell script, and then an example on how to invoke it.
#!/bin/bash
: ${ARG1:="somedefault_arg1"}
: ${ARG2:="10"}
echo "ARG1 = $ARG1"
echo I was trying to run Oracle SQL Developer for the first time on a new machine. When firing it up, it presented me with a dialog box asking me to “Enter the full pathname for the java.exe file”.
OK, no problem. So I find the path to the java.exe binary that was just installed with the SDK. Hit submit . . . and nothing happens. It blanks out the text field and the dialog box stares back at me.
To create a short cut and pin it to the task bar in Windows 7 do the following:
A quick one-liner for counting the number of characters in a given field for each line in an ASCII file.
for i in `cat source.txt`; do echo $i | awk {'print length($1)}' >> counts.txtIf you want to write a HQL hive query and run it mulitple times from a shell script, each time passing it different data for the query, here is a quick example that should get you started.
The first thing to know is that by specifying n number of -hivevar key value pairs when invoking hive on the command line will allow you to pass that data into the hive process.
For example, if you do the following
$ hive Even though the ADT bundle provides a 64 bit version, the system requirements indicate that “64-bit distributions must be capable of running 32-bit applications.” I failed to see that when installing it under Fedora Core 20 and was getting the following error from Eclipse:
Error executing aapt: Cannot run program "/home/rchapin/sdks/adt-bundle-linux-x86_64-20131030/sdk/build-tools/android-4.4/aapt": error=2, No such file or directory: error=2, No such file or directory android_sdk line 1 Android ADT ProblemI checked to see if the file was there. Yep. I → Continue reading “Eclipse Android Development Error executing aapt: Cannot run program “/path/to/aapt”: error=2, No such file or directory: error=2, No such file or directory”
When setting up Eclipse for Android development, after you have installed the Develeper Tools and NDK Plugins and linked to the ADT-bundle and then imported your project (see othere posts related by searching for ‘android’) I got the following error:
[2014-03-24 14:14:53 - android_sdk] Unable to resolve target 'android-18'I went and checked to make sure that the Platform.MinPlatformToolsRev property in the ~/path/to/adt-bundle-linux-x86_64-20131030/sdk/tools/source.properties matched that of my project.properties file.
They were both 18. Eh? Why the error?
So, in Eclipse, → Continue reading “Setting up Android in Eclipse, Unable to resolve target ‘android-18’”