Function npSet

src/lib/nested_property.js:131–184

(cont, parts, propStr)

}

function npSet(cont, parts, propStr) {
    return function(val) {
        var curCont = cont;
        var propPart = '';
        var containerLevels = [[cont, propPart]];
        var toDelete = isDeletable(val, propStr);
        var curPart;
        var i;

        for(i = 0; i < parts.length - 1; i++) {
            curPart = parts[i];

            if(typeof curPart === 'number' && !isArrayOrTypedArray(curCont)) {
                throw 'array index but container is not an array';
            }

            // handle special -1 array index
            if(curPart === -1) {
                toDelete = !setArrayAll(curCont, parts.slice(i + 1), val, propStr);
                if(toDelete) break;
                else return;
            }

            if(!checkNewContainer(curCont, curPart, parts[i + 1], toDelete)) {
                break;
            }

            curCont = curCont[curPart];

            if(typeof curCont !== 'object' || curCont === null) {
                throw 'container is not an object';
            }

            propPart = joinPropStr(propPart, curPart);

            containerLevels.push([curCont, propPart]);
        }

        if(toDelete) {
            if(i === parts.length - 1) {
                delete curCont[parts[i]];

                // The one bit of pruning we still do: drop `undefined` from the end of arrays.
                // In case someone has already unset previous items, continue until we hit a
                // non-undefined value.
                if(Array.isArray(curCont) && +parts[i] === curCont.length - 1) {
                    while(curCont.length && curCont[curCont.length - 1] === undefined) {
                        curCont.pop();
                    }
                }
            }
        } else curCont[parts[i]] = val;
    };
}

function joinPropStr(propStr, newPart) {
    var toAdd = newPart;