prompt

So, I've been trying to customize by bash prompt so that it will look like [feralin@localhost ~]$ _ with colors. I managed to get constant colors (the same colors every time I see the prompt) but I want the username ('feralin') to appear red, instead of green, if the last command had a nonzero exit status. I came up with: \e[1;33m[$(if [[ $? == 0 ]]; then echo "\e[0;31m"; else echo "\e[0;32m"; fi)\u\e[m@\e[1;34m\h \e[0;35m\W\e[1;33m]$ \e[m However, from my observations, the $(if ...; fi) seems to be evaluated once, when the .bashrc is run, and the result is substituted forever after. This

What is the total in the output of ls -l ? $ ls -l /etc total 3344 -rw-r--r-- 1 root root 15276 Oct 5 2004 a2ps.cfg -rw-r--r-- 1 root root 2562 Oct 5 2004 a2ps-site.cfg drwxr-xr-x 4 root root 4096 Feb 2 2007 acpi -rw-r--r-- 1 root root 48 Feb 8 2008 adjtime drwxr-xr-x 4 root root 4096 Feb 2 2007 alchemist You can find the definition of that line in the ls documentation for your platform. For coreutils ls (the one found on a lot of Linux systems), the information can be found via info coreutils ls : For each directory that is listed, preface the files with a line `total BLOCKS', where BLOCKS is

简介 Bootbox.js 是一个小型的JavaScript库，基于Bootstrap模态框开发，用于创建可编程的对话框。 不像原生的alert等对话框，所有的Bootstrap模态框生成的都是非阻塞事件。所以 在使用 confirm() 对话框时，请记住这一点，因为它不是本地确认对话框的替代。 任何取决于用户选择的代码都必须放在回调函数中。 alert alert是只有单个按钮的对话框，按ESC键或单击关闭按钮可关闭对话框。 bootbox.alert("Your message here…") message中可以放html语言，比如： bootbox.alert("Your message <b>here…</b>") 回调函数： bootbox.alert("Your message here…", function(){ /* your callback code */ }) options选项自定义对话框: bootbox.alert({ size: "small", title: "Your Title", message: "Your message here…", callback: function(){ /* your callback code */ } }) Confirm Confirm是具有确定和取消按钮的对话框，

I've been trying to solve this problem for the last couple days: when I subtract, multiply or divide 2 numbers input through a prompt, everything works fine; but when I want to add them, I get the 2 numbers simply written together. Example: if I add 5 and 6, I get 56!! Here's the code I'm working with. var a = prompt("Enter first number"); var b = prompt("Enter second number"); alert(a + b); What am I doing wrong? Do I have to specify the value type? The function prompt returns a string and + is (unwisely, perhaps) used for both string concatenation and number addition. You do not "specify