{"id":1861,"date":"2014-02-28T18:42:45","date_gmt":"2014-02-28T18:42:45","guid":{"rendered":"http:\/\/blog.designed79.co.uk\/?p=1861"},"modified":"2014-03-03T12:55:43","modified_gmt":"2014-03-03T12:55:43","slug":"covert-case-in-bash","status":"publish","type":"post","link":"https:\/\/blog.designed79.co.uk\/?p=1861","title":{"rendered":"Convert case in Bash"},"content":{"rendered":"

tr<\/a><\/h3>\n
\n\n
$ echo $a | tr '[:upper:]' '[:lower:]'
\nhi all<\/div><\/div>\n\n<\/pre>\n
AWK<\/a><\/h3>\n
\n\n
$ echo $a | awk '{print tolower($0)}'
\nhi all<\/div><\/div>\n\n<\/pre>\n
Bash 4.0<\/a><\/h3>\n
\n\n
$ echo ${a,,}
\nhi all<\/div><\/div>\n\n<\/pre>\n
Perl<\/a><\/h3>\n
\n\n
$ echo $a | perl -ne 'print lc'
\nhi all<\/div><\/div>\n\n<\/pre>\n
Bash<\/a><\/h3>\n
\n\n
lc(){
\n    case "$1" in
\n        [A-Z])
\n        n=$(printf "%d" "'$1")
\n        n=$((n+32))
\n        printf \\\\$(printf "%o" $n)
\n    esac
\n}
\nword="ABX"
\nfor((i=0;i&lt;${#word};i++))
\ndo
\n    ch=${word:$i:1}
\n    lc $ch
\ndone<\/div><\/div>\n\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
tr $ echo $a | tr ‘[:upper:]’ ‘[:lower:]’ hi all AWK $ echo $a | awk ‘{print tolower($0)}’ hi all Bash 4.0 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1861","post","type-post","status-publish","format-standard","hentry","category-info-on-tech"],"_links":{"self":[{"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/1861","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1861"}],"version-history":[{"count":0,"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/1861\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1861"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1861"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.designed79.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1861"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}