# draw rhomb

a=\$(b=\$((\$LINES/2));f() { for c in \$(seq \$b); do for i in \$(seq \$c);do echo x;done|xargs echo;done };paste <(f) <(f|tac|tr 'x' '-') <(f|tac|tr 'x' '-') <(f)|tr '\t' ' ');(cat <<<"\$a"|tac;cat <<<"\$a")|tr '-' ' '

1
2015-04-08 02:33:05

### What Others Think

Ooh, that's pretty, but I need to sleep :-) flatcap · 337 weeks and 4 days ago
You command looked quite simple to start with. Then I noticed a spare ) and realised how devious it was! My first attempt is a bit more linear (and slightly smaller) `L=\$((LINES/2))` `function f()` `{` `for A in \$(seq \$L); do` `for B in \$(seq \$L); do` `[ \$A -lt \$B ] && C=' ' || C=x` `echo -n "\$C "` `done` `echo` `done` `}` `X=\$(f | tac; f)` `paste <(echo "\$X") <(echo "\$X" | rev) | sed 's/\t //'` The function f draws the bottom-left quadrant. Then I use tac and rev to reflect my way to the others. It compresses down to: `L=\$((LINES/2));f(){ for A in \$(seq \$L);do for B in \$(seq \$L);do [ \$A -lt \$B ]&&C=' '||C=x;echo -n "\$C ";done;echo;done };X=\$(f|tac;f);paste <(echo "\$X") <(echo "\$X"|rev)|sed 's/\t //'` That's 183 characters against your 210. flatcap · 337 weeks and 4 days ago
This new version starts with the middle line: x (lots of space) x then repeatedly replaces with whitespace with x (less space) x `S=\$((LINES*2-3))` `L=\$(printf "x%\${S}sx" "")` `function g()` `{` `for A in \$(seq \$((LINES/2))); do` `echo "\$L"` `L=\$(echo "\$L" | sed 's/ \( \+\)/ x\1x /')` `done` `}` `g | tac` `g` Compressed: 159 characters: `S=\$((LINES*2-3));L=\$(printf "x%\${S}sx" "");function g(){ for A in \$(seq \$((LINES/2))); do echo "\$L";L=\$(echo "\$L" | sed 's/ \( \+\)/ x\1x /');done };g|tac;g` flatcap · 337 weeks and 4 days ago
My last attempt was: `a=\$(b=\$((\$LINES/2-1));f() { for c in \$(seq \$b); do for i in \$(seq \$c);do echo x;done|xargs echo;done };paste <(f) <(f|tac|tr 'x' '-') <(f|tac|tr 'x' '-') <(f)|tr '\t' ' ');(cat <<<"\$a"|tac;cat <<<"\$a")|tr '-' ' '|sed 's/x \| x/+/g'` but, probably being too long, uploaded and copied back from web behaved distorted. Probes with sed 's/^\|\$/x/g' in combination with variable string length failed. In command simile to `echo {1..10..2}` replacing '10' with variable i.e. \$b is not possible, so archaic seq behaves better this way. @flatcap: Your "compressed: 159 characters long" command doesn't work for me (distorted output), but this another one "183 characters long" is fine. knoppix5 · 337 weeks and 4 days ago
The important (but squashed) part of my command was 4 spaces in the sed: `... | sed 's/ \( \+\)/ x\1x /'` sed space single-quote s slash space space space space backslash open-bracket space backslash plus backslash close-bracket slash space x backslash 1 x space slash single-quote My next command will be something to transliterate shell-commands into English. Try1: https://gist.github.com/flatcap/7e44ac26e150cd10511b Try2: https://gist.github.com/flatcap/d475cd45bcc5a5f126b7 flatcap · 337 weeks and 4 days ago
Ah. I can get your latest command to work, by making a couple of tweaks. In the paste, change the fourth clause from: `<(f)|tr '\t' ' ')` to `<(f)|tr -d '\t')` Then remove the final sed: `|sed 's/x \| x/+/g'` Leaving: `a=\$(b=\$((\$LINES/2-1));f() { for c in \$(seq \$b); do for i in \$(seq \$c);do echo x;done|xargs echo;done };paste <(f) <(f|tac|tr 'x' '-') <(f|tac|tr 'x' '-') <(f)|tr -d '\t');(cat <<<"\$a"|tac;cat <<<"\$a")|tr '-' ' '` flatcap · 337 weeks and 4 days ago
I see. While copy-paste process web to terminal and vice versa sed is loosing spaces - cause your/mine last command didn't obey. knoppix5 · 337 weeks and 4 days ago

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