什麼時候用blocks而不用Procs呢？1、Block:方法把一個對象拆分成很多片段，並且你希望你的用戶可以與這些片段做一些交互。2、Block:希望自動運行多個語句，如數據庫遷移(database migration)。3、Proc:希望多次復用一段代碼。4、Proc:方法有一個或多個回調方法(callbacks)。
Ruby中的Procs是代碼片段(code snippets)，不是方法。因此，Proc的return就是整個方法的return。但lambdas就像是單獨的methods(只不過是匿名的)，所以它要檢查參數個數，且不會覆蓋整個方法的返回。因此，最好把lambdas當作另一種methods的寫法，一種匿名的方式。
square不是Proc，而是Method。Method與lambda用法相同，因為它們的概念是一樣的。不同的是Method是有名字的method，而lambda是匿名method
[1,2,3,4].each {|n| puts n*2}
# Outputs:
# 2
# 4
# 6
# 8[1,2,3,4].map {|n| n*2}
# => [2,4,6,8]grep "車" Day19TestData.txt | awk {'print $2" - "$3'}
eventMouseover: function(calEvent, jsEvent, view) {
savBg = $(this).css("background-color");
savClr = $(this).css("color");
$(this).css( { color:'#ffff00', backgroundColor:"#006" } );
$("#test").css( { color:'#ffff00', backgroundColor:"#006" } );
$(this).fadeTo('slow',.5);//.css(text-align,'right');
},
eventMouseout: function(calEvent, jsEvent, view) {
$(this).css( { color:savClr, backgroundColor:savBg } );
$("#test").css( { color:savClr, backgroundColor:savBg } );
$(this).fadeTo('slow',1);
},
SELECT COUNT(col3) as countCol3
FROM table
GROUP BY col3
HAVING countCol3 > 1var firstHour = new Date().getUTCHours() - 5;
$('#calendar').fullCalendar({
firstHour: firstHour;
});getUTCHours --> UTC time is the same as GMT time. 台灣要加八小時'2012-11-14 14:27:46'.to_time.strftime('%B %e at %l:%M %p')
#=> "November 14 at 2:27 PM" interactive reference guide, refer to http://www.foragoodstrftime.com/$(document).on('page:load', function() {
// your stuff here
});ar ready = function() {
// do stuff here.
};
$(document).ready(ready);
$(document).on('page:load', ready);<script type="text/javascript" data-turbolinks-eval=false>
console.log("I'm only run once on the initial page load");
</script>
ApplicationController write following:after_filter :store_location
def store_location
# store last url - this is needed for post-login redirect to whatever the user last visited.
if (request.fullpath != "/users/sign_in" &&
request.fullpath != "/users/sign_up" &&
request.fullpath != "/users/password" &&
request.fullpath != "/users/sign_out" &&
!request.xhr?) # don't store ajax calls
session[:previous_url] = request.fullpath
end
end
def after_sign_in_path_for(resource)
session[:previous_url] || root_path
end
before_filter :authenticate_user! 你的ApplicationController 裡面before_filter :store_location 放在更上面#!/bin/bashfilename='/home/cdrs/temp/ilake/nomoj.txt'
exec < $filename #執行打開檔案
while read line #讀檔案內容
do#echo ${line:0:3} 取每一行的前三個字元cd /home/cdrs/backup/response/${line:0:3}/ #移到此目錄if [ -e $line.pgp ];then #檢查此內容檔案是否存在echo $line exists >>/home/cdrs/temp/ilake/nomojcheck.txtelseecho $line does not exist >> /home/cdrs/temp/ilake/nomojcheck.txtfidone
<%= simple_form_for [@goal ,@schedule] ,:html => { :id => 'event_form' }, :remote => true do |f| %>
<div>
<%= f.input :title %>
<%= f.input :description %>
<%= f.button :submit , :class => "btn btn-success" ,:onclick => "refetch_events_and_close_dialog()" %>
</div>
<% end %>
在$(document).ready就定義說#event_form這個如果submit的話$(document).ready(function(){
$('#desc_dialog').on('submit', "#event_form", function(event) {
event.preventDefault();
$.ajax({
type: "POST",
data: $(this).serialize(),
url: $(this).attr('action'),
success: refetch_events_and_close_dialog,
error: handle_error
});
function handle_error(xhr) {
alert(xhr.responseText);
}
});
});
<img src="smiley.gif" alt="Smiley face" width="42" height="42" title="ilake">
<dl>
<dt>Coffee</dt>
<dd>Black hot drink</dd>
<dt>Milk</dt>
<dd>White cold drink</dd>
</dl>
<em>Emphasized text</em><br><strong>Strong text</strong><br><dfn>Definition term</dfn><br><code>A piece of computer code</code><br><samp>Sample output from a computer program</samp><br><kbd>Keyboard input</kbd><br><var>Variable</var><br><q>test</q><br><address>address<address><br>
Emphasized text
Strong text
Definition term
A piece of computer codeSample output from a computer program
Keyboard input
Variable
test
address
可以維持輸入的格式<pre></pre>Text in a pre elementis displayed in a fixed-widthfont, and it preservesboth spaces andline breaks
Text in a pre element is displayed in a fixed-width font, and it preserves both spaces and line breaks
<abbr title=“ilake”> amy </abbr> ->滑鼠指標移過去時會顯示ilake
# ll –a 查看有沒有.ssh
# mkdir .ssh 建立.ssh
#cd .ssh 進入.ssh
#ssh-keygen -t rsa 執行創建密鑰命令
#scp/home/ap/ilake/.ssh/id_rsa.pub ilake@28.192.141.129:/ilake/.ssh
#ssh-keygen
# cd /.ssh 進入到.ssh目錄 .ssh權限必须是755或者700
# cp id_rsa.pub authorized_keys 第一次添加時將公鑰重命名為authorized_keys
# chmod 644 authorized_keys 公鑰文件的權限必须是644
# cat /tmp/id_rsa.pub >> authorized_keys
# sftp ilake@ip 成功的話就可以直接登入
若只輸入sftp ip 則扔然要有密碼