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package main

import (
        "encoding/json"
        "fmt"
)

func main() {
        var u1 []int
        fmt.Println("var define")
        j1, _ := json.Marshal(&u1)
        fmt.Println("origin:", u1)
        fmt.Println("json:", string(j1))

        fmt.Println()

        fmt.Println(":= define")
        u2 := []int{}
        j2, _ := json.Marshal(&u2)
        fmt.Println("origin:", u2)
        fmt.Println("json:", string(j2))
}

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wget https://nginx.org/download/nginx-1.16.1.tar.gz
wget https://www.openssl.org/source/openssl-1.1.1d.tar.gz
wget https://www.zlib.net/zlib-1.2.11.tar.gz
wget https://ftp.pcre.org/pub/pcre/pcre-8.43.tar.gz

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apt install -y g++ cmake gcc perl libperl-dev libgd3 libgd-dev libgeoip1 libgeoip-dev geoip-bin libxml2 libxml2-dev libxslt1.1 libxslt1-dev

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tar -xvf nginx-1.16.1.tar.gz
tar -xvf openssl-1.1.1a.tar.gz
tar -xvf zlib-1.2.11.tar.gz
tar -xvf pcre-8.43.tar.gz

useradd nginx

cd nginx-1.16.1
./configure --prefix=/usr/local/nginx \
            --user=nginx \
            --group=nginx \
            --build=Ubuntu \
            --builddir=nginx-1.16.1 \
            --with-select_module \
            --with-poll_module \
            --with-threads \
            --with-file-aio \
            --with-http_ssl_module \
             --with-http_v2_module \
            --with-http_realip_module \
            --with-http_addition_module \
            --with-http_xslt_module=dynamic \
            --with-http_image_filter_module=dynamic \
            --with-http_geoip_module=dynamic \
            --with-http_sub_module \
            --with-http_dav_module \
            --with-http_gunzip_module \
            --with-http_gzip_static_module \
            --with-http_auth_request_module \
            --with-http_random_index_module \
            --with-http_secure_link_module \
            --with-http_degradation_module \
            --with-http_slice_module \
            --with-http_stub_status_module \
            --with-http_perl_module=dynamic \
            --with-perl_modules_path=/usr/share/perl/5.26.1 \
            --with-perl=/usr/bin/perl \
            --with-stream=dynamic \
            --with-stream_ssl_module \
            --with-stream_realip_module \
            --with-stream_geoip_module=dynamic \
            --with-stream_ssl_preread_module \
            --with-compat \
            --with-pcre=../pcre-8.43 \
            --with-pcre-jit \
            --with-zlib=../zlib-1.2.11 \
            --with-openssl=../openssl-1.1.1d \
            --with-openssl-opt='enable-tls1_3'
make
make install
useradd nginx

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$ git branch -d branch_name
$ git branch -D branch_name