12:["$","div","5D57",{"className":"Post-module__aBOVGG__post","style":{"display":"flex","flexDirection":"column","alignItems":"center","gap":"8px","flex":"1","width":"calc(100% - 4vw)","padding":"12px","maxWidth":"920px"},"children":[["$","div",null,{"className":"$undefined","style":{"display":"flex","gap":"0.4rem","flexWrap":"wrap","width":"100%"},"children":[false,[["$","a","1022",{"href":"/1022","className":"Post-module__aBOVGG__fg","style":{},"children":"Rust"}],["$","a","1882",{"href":"/1882","className":"Post-module__aBOVGG__fg","style":{},"children":"Result"}],["$","a","0A0B",{"href":"/0A0B","className":"Post-module__aBOVGG__fg","style":{},"children":"環境変数"}],["$","a","AB2E",{"href":"/AB2E","className":"Post-module__aBOVGG__fg","style":{},"children":"std::env"}]]]}],["$","article",null,{"className":"article","children":[["$","div",null,{"className":"$undefined","style":{"display":"flex","justifyContent":"space-between","flexWrap":"wrap","width":"100%"},"children":[["$","h2",null,{"style":{"margin":"0.2rem"},"children":["$","a",null,{"href":"/5D57","children":"var"}]}],["$","div",null,{"className":"$undefined","style":{"display":"flex","justifyContent":"end","alignItems":"center","flex":"1","textAlign":"right","whiteSpace":"nowrap"},"children":["$","div",null,{"children":"2022/2/25 20:15:00"}]}]]}],["$","div",null,{"className":"article_body","dangerouslySetInnerHTML":{"__html":"

引数で与えられた名前の環境変数が設定されていたら、環境変数の値を含むOk列挙子の成功値になるResultを返し、設定されていなければErr列挙子を返す関数\n

"}}]]}],["$","div",null,{"className":"$undefined","style":{"display":"flex","gap":"0.4rem","flexWrap":"wrap","width":"100%"},"children":[["$","a","",{"href":"/","className":"Post-module__aBOVGG__bg","style":{"opacity":0},"children":"あれ"}],[]]}]]}]

std::env

var

std::env::args