How to get an environment variable in Go?
In Go lang, how to get an environment variable?
To get an environment variable (e.g. “VAR”) in GO:
import "os"
import "fmt"
fmt.Println("VAR:", os.Getenv("VAR"))
In Go lang, how to get an environment variable?
To get an environment variable (e.g. “VAR”) in GO:
import "os"
import "fmt"
fmt.Println("VAR:", os.Getenv("VAR"))
Two notices: 1, a process has only one main thread which is itself. 2, a process has many threads. Solution 1: Please use taskstats [1] related interfaces, and send TASKSTATS_TYPE_PID and TASKSTATS_TYPE_TGID commands to kernel to get a process’s ‘blkio_delay_total’ parameter for a process with one main thread and a process with threads separately. Solution…
How to enable auto code completion in Vim, like in the IDE? Several plugins I use: snipMate: Plugin for using TextMate-style snippets in Vim omnicppcomplete: Plugin for C/C++ omnicompletion neocomplcache: Ultimate auto completion system for Vim Read more: How to enable Email address auto completion in Evolution? Profiling Vim to Find Out Which Plugin Makes…
I connect a USB keyboard to my laptop so the internal keyboard is not used anymore. But I may press some keys by accident. How to disable the laptop internal keyboard? I am working on Linux. This post introduces how to disable laptop’s internal keyboard on Linux: How to Disable and Enable Laptop Keyboard in…
I already have PHP and nginx installed and running on my on centOS 6.7. Please guide me, how can install glibc, glibc-common and GD libraries independently on my centOS 6.7 without crashing my system? I am not sure how you installed PHP and nginx. If they are installed from CentOS6.7’s Yum repository, you may install…
全文介绍如何使用MFC在一对话框中嵌入另一对话框. 代码如下: static MyInDlg inDlg; // 需嵌入的对话框 inDlg.Create( IDD_DIALOG, AfxGetApp()->m_pMainWnd); CRect rc; // 嵌入对话框在原对话框中的位置 //GetClientRect(&rc); rc.left = 150; rc.top = 0; rc.bottom = 200; rc.right = 350; inDlg.MoveWindow( rc ); // 设置位置 inDlg.ShowWindow( SW_SHOW ); // 将对话框显示出来 对嵌入对话框设置如下: Style: Child Border: none Read more: MFC程序使用系统风格界面 Send Messages to Other Windows Using Win32 API 禁止对话框关闭按钮和Alt+F4 一个非常优秀的MFC…
Read content of a file to string (in this example, we echo it): // Get text from file function get_text($text_filename) { if ($text_filename != “”) { $text = “”; $text_file = fopen($text_filename, “r”); while (!feof($text_file)) { $text = $text . fgets($text_file, 4096); } fclose($text_file); if ( $text != “” ) { echo $text; } }…