Mini Program this kind of merchant how far away from my position km is how to achieve?

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Mar.22,2021

solve

use Mini Program's official map interface to obtain your coordinate reference: https://developers.weixin.qq.
through the corresponding calculation, Get the straight line distance between two points reference: https://codeshelper.com/a/11.

principle

the merchant will submit an address when registering, and there is a corresponding longitude and latitude
when you log in, Mini Program can also get your longitude and latitude
and leave the rest to junior high school math

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lbs get to know

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b30fd3-2bd56.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b30fd3-2bd56.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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