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i'm working node.js, , in 1 of js files i'm using const in "strict mode" . when trying run it, i'm getting error: syntaxerror: use of const in strict mode. what best practice this? edit: 'use strict' const max_image_size = 1024*1024; // 1 mb the const , let part of ecmascript 2015 (a.k.a. es6 , harmony), , not enabled default in node.js 0.10 or 0.12. since node.js 4.x, “all shipping [es2015] features, v8 considers stable, turned on default on node.js , not require kind of runtime flag.”. node.js docs has overview of es2015 features enabled default, , require runtime flag . upgrading node.js 4.x or newer error should disappear. to enable of ecmascript 2015 features (including const , let ) in node.js 0.10 , 0.12; start node program harmony flag, otherwise syntax error. example: node --harmony app.js it depends on side strict js located. recommend using strict mode const declarations on server side , start server harmony flag....

today facing challenge me, solve multiple queries, little bit of php , other funny things, wondering whether mean can achieved single query and/or stored fn/procedure. i explain myself better: in list of cities, need pick value (say "general expenses") of named city (say "rome"). pretty simple. what is: have 6 records same value before , 6 after rome one. see something: | position | city | expenses | | 35 | paris | 1364775 | | 36 | milan | 1378499 | | 37 | new york | 1385759 | | 38 | london | 1398594 | | 39 | oslo | 1404648 | | 40 | munchen | 1414857 | | 41 | rome | 1425773 | *** <--this value need | 42 | dublin | 1437588 | | 43 | athen | 1447758 | | 44 | stockholm | 1458593 | | 46 | helsinki | 1467489 | | 47 | moscow | 1477484 | | 48 | kiev | 1485665 | these values populate bars chart. as can see there complexit...

in numpy, there easy way broadcast 2 arrays of dimensions e.g. (x,y) , (x,y,z) ? numpy broadcasting typically matches dimensions last dimension, usual broadcasting not work (it require first array have dimension (y,z) ). background: i'm working images, of rgb (shape (h,w,3) ) , of grayscale (shape (h,w) ). generate alpha masks of shape (h,w) , , want apply mask image via mask * im . doesn't work because of above-mentioned problem, end having e.g. mask = mask.reshape(mask.shape + (1,) * (len(im.shape) - len(mask.shape))) which ugly. other parts of code operations vectors , matrices, run same issue: fails trying execute m + v m has shape (x,y) , v has shape (x,) . it's possible use e.g. atleast_3d , have remember how many dimensions wanted. how use transpose: (a.t + c.t).t

i've created tabbar in storyboard , set custom image. want use different image "selected" state, know can't set image using storyboard how do programmatically? i want change icon tint colour in code can't make happen either. i appreciate please. try in appdelegate.m file [tbc.tabbar setselectionindicatorimage:[uiimage imagenamed:@"your_image_name.png"]]; where tbc - tabbarcontroller uistoryboard *iphonesb = [uistoryboard storyboardwithname:@"main_iphone" bundle:nil]; customtabbarcontroller *tbc = [iphonesb instantiateinitialviewcontroller];

i have select dropdown , want load more options in when scroll bar reaches @ bottom not do. used following code did not work me $(function () { var $win = $('#couponproduct_0_id_brand'); $win.scroll(function () { if ($win.scrolltop() == 0) alert('scrolled page top'); else if ($win.height() + $win.scrolltop() == $(document).height()) { alert('scrolled page bottom'); } }); }); found answer here instead of automatically loading more list-items, suggest placing button users can tap load more (but that's suggestion). reference check out pulgin

as saw code, wondering run without problems. the object passed reference isn't copy of it. if put reference vector , object out of scope, shouldn't accessible anymore. but does. reason why works push_back() creates copy of referenced object. answer of behavior? struct struct1 { int value; }; std::vector<struct1> testvect; void pushvect(struct1 & element) { testvect.push_back(element); } void fillvect() { struct1 s1; (int = 0; < 10; i++) { s1.value = i; pushvect(s1); } } the push_back methods of vector taking care of making copy itself: c++ reference adds new element @ end of vector, after current last element. content of val copied (or moved) new element. so during call estvect.push_back(element); the vector works copy. therefore there no problem.

i using devise gem authentication. in application admin create users, want user's reset password link when admin creates users. this action:- def create @user = user.new(user_params) @user.password = '123123123' @user.password_confirmation = '123123123' if @user.save @user.update_attributes(:confirmation_token => nil,:confirmed_at => time.now,:reset_password_token => (0...16).map{(65+rand(26)).chr}.join,:reset_password_sent_at => time.now) usermailer.user_link(@user).deliver redirect_to users_path else render :action => "new" end end this link reset user's password but getting reset password token invalid when open link , update password. you can use user.send_reset_password_instructions that.