version

How can I check whether Java is available (in the PATH or via JAVA_HOME) from a bash script and make sure the version is at least 1.5? Perhaps something like: if type -p java; then echo found java executable in PATH _java=java elif [[ -n "$JAVA_HOME" ]] && [[ -x "$JAVA_HOME/bin/java" ]]; then echo found java executable in JAVA_HOME _java="$JAVA_HOME/bin/java" else echo "no java" fi if [[ "$_java" ]]; then version=$("$_java" -version 2>&1 | awk -F '"' '/version/ {print $2}') echo version "$version" if [[ "$version" > "1.5" ]]; then echo version is more than 1.5 else echo version is less than 1

I have a Node.js project that requires Node version 12 or higher. Is there a way to specify this in the packages.json file, so that the installer will automatically check and inform the users if they need to upgrade? I think you can use the "engines" field: { "engines" : { "node" : ">=0.12" } } As you're saying your code definitely won't work with any lower versions, you probably want the "engineStrict" flag too: { "engineStrict" : true } Documentation for the package.json file can be found on the npmjs site Update engineStrict is now deprecated, so this will only give a warning. It's now down

Is there a quick way to determine the version of the Boost C++ libraries on a system? Boost Informational Macros . You need: BOOST_VERSION Tested with boost 1.51.0: std::cout << "Using Boost " << BOOST_VERSION / 100000 << "." // major version << BOOST_VERSION / 100 % 1000 << "." // minor version << BOOST_VERSION % 100 // patch level << std::endl; Output: Using Boost 1.51.0 Tested with boost versions 1.51.0 to 1.65.0 If you only need to know for your own information, just look in /usr/include/boost/version.hpp (Ubuntu 13.10) and read the information directly #include <boost/version.hpp>

I'm tasked with replicating a production environment to create many test/sit environments. One of the things I need to do is build up Perl, with all the modules which have been installed (including internal and external modules) over the years. I could just use CPAN.pm autobundle, but this will result in the test environment having much newer versions of the external modules that production has. What is the easiest/best way to get and install (a lot of) version specific Perl modules. Make your own CPAN mirror with exactly what you want. Stratopan.com , a service, and Pinto , tools that's built

I'm trying to get the values for x and y to make a circles using d3.js v4. With the following code I manage to create the chart like behavior of the circles, but when I try to run the same code in v4 it doesn't work anymore. I know that there are some differences in the update to v4 but I didn't find any information about it. So i was wondering if someone can help me to run this code in d3.js v4. Here is the code using v3 (it will break using v4): var svg = d3.select('body').append('svg') .attr('width', 250) .attr('height', 250); //render the data function render(data) { //Bind var circles =