解决VUE执行项目中ERR_OSSL_EVP_UNSUPPORTED报错问题 由于node版本过高导致node执行VUE某些项目的时候会报ERR_OSSL_EVP_UNSUPPORTED这时修改package.json,加上SET NODE_OPTIONS=--openssl-legacy-provider"scripts": { "dev": "SET NODE_OPTIONS=--openssl-legacy-provider && vue-cli-service serve", "lint": "eslint --ext .js,.vue src", "build:prod": "vue-cli-service build", "build:stage": "vue-cli-service build --mode staging", "preview": "node build/index.js --preview", "new": "plop", "svgo": "svgo -f src/icons/svg --config=src/icons/svgo.yml", "test:unit": "jest --clearCache && vue-cli-service test:unit", "test:ci": "npm run lint && npm run test:unit" },

js更改url字符串的某个参数 url = changeURLArg(url,'bed_id',json.bedId) function changeURLArg(url,arg,arg_val){ var pattern=arg+'=([^&]*)'; var replaceText=arg+'='+arg_val; if(url.match(pattern)){ var tmp='/('+ arg+'=)([^&]*)/gi'; tmp=url.replace(eval(tmp),replaceText); return tmp; }else{ if(url.match('[\?]')){ return url+'&'+replaceText; }else{ return url+'?'+replaceText; } } }

VSCODE设置点击选项卡左侧资源管理器显示并选择该文件 将此处改为true

php数组按某一个键值排序 public function array_sort($array,$keys,$type='asc'){ if(!isset($array) || !is_array($array) || empty($array)){ return ''; } if(!isset($keys) || trim($keys)==''){ return ''; } if(!isset($type) || $type=='' || !in_array(strtolower($type),array('asc','desc'))){ return ''; } $keysvalue=array(); foreach($array as $key=>$val){ $val[$keys] = str_replace('-','',$val[$keys]); $val[$keys] = str_replace(' ','',$val[$keys]); $val[$keys] = str_replace(':','',$val[$keys]); $keysvalue[] =$val[$keys]; } asort($keysvalue); //key值排序 reset($keysvalue); //指针重新指向数组第一个 foreach($keysvalue as $key=>$vals) { $keysort[] = $key; } $keysvalue = array(); $count=count($keysort); if(strtolower($type) != 'asc'){ for($i=$count-1; $i>=0; $i--) { $keysvalue[] = $array[$keysort[$i]]; } }else{ for($i=0; $i<$count; $i++){ $keysvalue[] = $array[$keysort[$i]]; } } return $keysvalue; }

MySQL获取某一列的不同值的个数 $count=db('meter_yj_message')->where('read',0)->where('type',3)->field('equip_id')->count('distinct equip_id'); //sql语句 select count( distinct equip_id) from VALUE_METER_YJ_MESSAGE where [read] = 0