Juejin
Latest recorded position: #12 on Aug 12, 2026, 8:33 AM CST.
There are not enough retained observations to calculate a rank change.
listToTree Explained: Turning a Flat Array into a Nested Menu with Map and Reduce
listToTree 速通：一维数组怎么变出多级菜单？Map 和 reduce 两种全解
ThreadEast first recorded "listToTree Explained: Turning a Flat Array into a Nested Menu with Map and Reduce" on Aug 9, 2026, 8:48 PM CST. It has been observed on Juejin, with 2 days between the first and latest recorded appearances.
What the trend data tells us
The English title describes the topic of the source listing. Its appearance in a ranking measures attention within that platform; the ranking alone does not explain the cause of a spike or verify the underlying claim.
This stable URL remains available after a topic leaves a live ranking. Observation span is elapsed time between sightings, not continuous time on a chart. Platforms use different ranking and heat systems; their metrics are not added together.
Original evidence
Source listings
JJ
#12Source metric: 热度:234
Original source