Using Ruby Environmental Variables

Utilizing Ruby Environmental Variables Condition factors are factors passed to programs by the order line or the graphical shell. At the point when a domain variable is alluded to, its worth (whatever the variable is characterized as) is then referenced. In spite of the fact that there are various condition factors that solitary influence the order line or graphical shell itself, (for example, PATH or HOME), there are additionally a few that legitimately influence how Ruby contents execute. Tip:Â Ruby condition factors are like ones found in the Windows OS. For instance, Windows clients might be comfortable with a TMPÂ user variable to characterize the area of the brief envelope the for the as of now signed in client. Getting to Environment Variables from Ruby Ruby has direct access to condition factors by means of the ENV hash. Condition factors can be straightforwardly perused or written to by utilizing the record administrator with a string contention. Note that composition to condition factors will just affect kid procedures of the Ruby content. Different summons of the content won't see the adjustments in condition factors. #!/usr/container/env ruby# Print some variablesputs ENV[PATH]puts ENV[EDITOR]# Change a variable at that point dispatch another programENV[EDITOR] geditcheat environment_variables include Passing Environment Variables to Ruby To pass condition factors to Ruby, basically set that condition variable in the shell. This fluctuates marginally between working frameworks, however the ideas continue as before. To set a domain variable on the Windows order brief, utilize the set order. set TESTvalue To set a situation variable on Linuxâ or OS X, utilize the fare order. Thoughâ environment factors are a typical piece of the Bash shell, just factors that have been sent out will be accessible in programs propelled by the Bash shell. $ trade TESTvalue On the other hand, if the earth variable may be utilized by the program going to be run, you can characterize any condition factors before the name of the order. The earth variable will be passed onto the program as its run, however not spared. Any further summons of the program won't have this condition variable set. $ EDITORgedit cheat environment_variables include Condition Variables Used by Ruby There are various condition factors that influence how the Ruby translator acts. RUBYOPT - Any order line switches here will be included to any switches indicated the order line.RUBYPATH - When utilized with the - S switch on the order line, the ways recorded in RUBYPATH will be added to the ways scanned when searching for Ruby contents. The ways in RUBYPATH go before the ways recorded in PATH.RUBYLIB - The rundown of ways here will be added to the rundown of ways Ruby uses to look for libraries remembered for the program with the require technique. The ways in RUBYLIB will be looked before different indexes.