Himself in js WeChat small program page to the for loop array traversal,
Testing whether a property of the array containing certain fields, will contain the array of fields selected, test, array length is 3, the key field is the "know"
But when the for loop, j stopped from 0 to 1, the last time no execution, and selected array in the background is not printed


For bosses to give directions!!!!!! So confused!!!!!