golang map排序
package main import ( "fmt" "sort" ) // 按map的key排序 func main() { params := make(map[string]interface{}) params["age"] = 23 params["name"] = "xxx" params["sex"] = 0 params["level"] = 1 // 1.去除...
Golang对map中的key进行排序
Golang对map中的key进行排序package main import ( "fmt" "sort" ) func main() {<br> //首先生成26个字母充当map中的key var a = 'a' var m map[string]int = make(map[string]int) for i := 0; i < 26; i++ { // fmt.Printf("%c", a) //%c 是输出字符 ke...
Golang map字典按照键排序和按照值排序
Golang map字典按照键排序和按照值排序字典按键排序package main import ( "fmt" "sort" ) func main() { m := map[string]int32{ "roy": 18, "kitty": 16, "hugo": 21, "tina": 35, "jason": 23, }...
go语言之map排序
go语言之map排序package main import ( "sort" "fmt" ) func main() { lockTest() } func lockTest() { var mp map[string]int mp = make(map[string]int) mp["1"] = 1 mp["5"] = 45 mp["6"] = 3 mp["4"] = 22 mp["2"...
php 查询当月每天数据
<? $days = date('t', strtotime(date('Y') . '-' . date('m') . '-01'));// 获取当月天数 for ($i=1; $i<=$days; $i++) { $sd=date('Y-m-').$i; //数据库查询语句 } ?>
Golang Mysql 增删改查
Golang Mysql 增删改查 package main import ( "database/sql" "fmt" _ "github.com/go-sql-driver/mysql" ) func main() { //连接数据库 db, err := sql.Open("mysql", "root:@tcp(127.0.0.1:3306)/gupiao?charset=utf8") if err != nil { ...
Golang截取小数位数
Golang截取小数位数package main import ( "fmt" "strconv" ) func main() { var ff float64 ff = -1.355123156 ff = FloatRound(ff, 4) fmt.Println(ff) // 输出 -1.3551 } // 截取小数位数 func FloatRound(f float64, n int) float64 { format := "%." + strconv.Itoa(n...
Golang 字符串分割,替换和截取
package main import ( "fmt" "strings" ) func main() { str := "赵,钱,孙,李,赵" //字符串分割, 使用字符分割 str1 := strings.Split(str, ",") fmt.Println(str1[0]) //赵 fmt.Println(str1[1]) //钱 fmt.Println(str1[2]) //孙 fmt.Println(str1[3]) /...
go 迭代string数组 go for string[]
go 迭代string数组,直接拷贝去用即可package mainimport ( "fmt" ) func main() { subsCodes := []string{"aaaa", "vvvvv", "dddd", "eeeee", "gfgggg"} for _, s := range subsCodes { fmt.Println(s) } }
goland 字符串去除空格和换行符
字符串去除空格和换行符package main import ( "fmt" "strings" ) func main() { str := "这里是 www\n.180it\n.com" fmt.Println("-------- 原字符串 ----------") fmt.Println(str) // 去除空格 str = strings.Replace(str, " ", ...
php实现遍历目录压缩图片
<?php /** * 遍历目录压缩图片 */ function zip_img($filename){ $percent = 1; // 获取新的尺寸 $imginfo = list($width, $height) = getimagesize($filename); $type = $imginfo['mime']; $new_width = $width * $percent; $new_height = $height * $percent; while($new_width>620 || $new_hei...
