Ruby block variable scope within/out the method -


i following different results:

test 1:

def myblock   x = 1   y = 1   yield(x)   [x, y] end  myblock |x|  y = 10 end # => [1,1]

test 2:

x = 1 y = 1  1.upto(2) |x|   y = 20 end [x,y] # => [1,20]

variables created outside block available in block. why so?

that how scope of local variable defined. local variable can percolate block, not method definition.


Comments

Post a Comment

Popular posts from this blog

html - How to custom Bootstrap grid height? -

why bootstrap grid has height 591.067 ? did height came ? .main-post { padding: 20px; background-color: #fff; border: 1px solid #d8d8d8; margin-bottom: 100px; } .main-post .post-categories { margin-bottom: 10px } .main-post h3 { margin: 0 0 10px; color: #777; letter-spacing: -1px; font-weight: bold } .main-post .post-author, .main-post .post-date, .main-post .post-comments { font-size: 12px } .main-post img { display: block; margin: 10px 0; } .main-post .post-summary { line-height: 1.7; color: #888 } .main-post { color: #999 } <div class="col-sm-6"> <div class="main-post"> <h3 class="post-title"> <a href="#"> post title </a> </...
Read more

javascript - pass values from mssql to views in node -

being new node js , javascript . have been trying find solution problem . this app.js file var express=require ('express'); var bodyparser = require('body-parser'); var path = require ('path'); var sql = require('mssql'); var app = express(); const config = { user: 'sa', password: 'password', server: 'localhost\\sqlexpress', // can use 'localhost\\instance' connect named instance database: 'pcgdb', options: { encrypt: false // use if you're on windows azure } }; const request = new sql.request() //view engine app.set('view engine', 'ejs'); app.set('views', path.join(__dirname, 'views')) app.use(bodyparser.json()); app.use(bodyparser.urlencoded({extended: false})); app.get('/',function(req,res){ res.render('index') }); app.get('/new_project', function(req, res) { function(data,err){ ...
Read more

javascript - Understanding ExtJS Framework Syntax -

i have been given project uses sencha's extjs framework, no handover or documentation. trying come grips hoping people can pls assist me following syntax possibly point me specific site might explain code newcomer framework. i have been going through code , unsure doing, i.e.: if(val==1) { ext.getcmp('status').settext('awaiting approv'); } switch(flag) { case 1: if(val==0) { ext.getcmp('complex_first').el.replacecls('x-form-complex', 'x-form-simplex'); } else { ext.getcmp('complex_first').el.replacecls('x-form-simplex', 'x-form-complex'); } break; case 2: if(val==0) { ext.getcmp('complex_second').el.replacecls('x-form-complex', 'x-form-simplex'); } else { ext.getcmp('complex_second').el.replacecls('x-fo...
Read more