PNG  IHDR;IDATxܻn0K )(pA 7LeG{ §㻢|ذaÆ 6lذaÆ 6lذaÆ 6lom$^yذag5bÆ 6lذaÆ 6lذa{ 6lذaÆ `}HFkm,mӪôô! x|'ܢ˟;E:9&ᶒ}{v]n&6 h_tڠ͵-ҫZ;Z$.Pkž)!o>}leQfJTu іچ\X=8Rن4`Vwl>nG^is"ms$ui?wbs[m6K4O.4%/bC%t Mז -lG6mrz2s%9s@-k9=)kB5\+͂Zsٲ Rn~GRC wIcIn7jJhۛNCS|j08yiHKֶۛkɈ+;SzL/F*\Ԕ#"5m2[S=gnaPeғL lذaÆ 6l^ḵaÆ 6lذaÆ 6lذa; _ذaÆ 6lذaÆ 6lذaÆ RIENDB` function last(array) { return array[array.length - 1] } let brackets = { /** * Parse string to nodes tree */ parse(str) { let current = [''] let stack = [current] for (let sym of str) { if (sym === '(') { current = [''] last(stack).push(current) stack.push(current) continue } if (sym === ')') { stack.pop() current = last(stack) current.push('') continue } current[current.length - 1] += sym } return stack[0] }, /** * Generate output string by nodes tree */ stringify(ast) { let result = '' for (let i of ast) { if (typeof i === 'object') { result += `(${brackets.stringify(i)})` continue } result += i } return result } } module.exports = brackets