fortil

node {
    echo 'Results included as an inline comment exactly how they are returned as of Jenkins 2.121, with $BUILD_NUMBER = 1'
    echo 'No quotes, pipeline command in single quotes'
    sh 'echo $BUILD_NUMBER' // 1
    echo 'Double quotes are silently dropped'
    sh 'echo "$BUILD_NUMBER"' // 1
    echo 'Even escaped with a single backslash they are dropped'
    sh 'echo \"$BUILD_NUMBER\"' // 1
    echo 'Using two backslashes, the quotes are preserved'
    sh 'echo \\"$BUILD_NUMBER\\"' // "1"

fortil

function SExpression(nodes) {
    if (!/(\(|\))+/g.test(nodes)) {
        return 'E5'
    }
    let a = nodes.split(' ').map(i => i.replace(/\(|\)/g, '').split(','))
    let keyPair = a.map(i => i[0])
    let valuePair = a.map(i => i[1])
    let aE1 = keyPair.reduce((prev, curr) => {
        prev[curr] = (prev[curr] || 0) + 1
        return prev