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CoffeeScript, When to use fat arrow (=>) over arrow (->) and vice versa
...rences instance fields:
class A
constructor: (@msg) ->
thin: -> alert @msg
fat: => alert @msg
x = new A("yo")
x.thin() #alerts "yo"
x.fat() #alerts "yo"
fn = (callback) -> callback()
fn(x.thin) #alerts "undefined"
fn(x.fat) #alerts "yo"
fn(-> x.thin()) #alerts "yo"
As y...
is it possible to change values of the array when doing foreach in javascript?
...ree"];
arr.forEach(function(part) {
part = "four";
return "four";
})
alert(arr);
First off, here is where you should be reading about Array.prototype.forEach():
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach
Second, let's talk briefly about v...
How do I fetch a single model in Backbone?
... @makevoid your I could not make work the example you provide in coffee script or the one in the documentation, the Andrew example works, could you provide and example with foo.url(), it always tell me that there's no function url.
– Roberto Alarcon
Dec 13 '...
dd: How to calculate optimal blocksize? [closed]
...
For determining THE optimal output block size, I've written the following script that tests writing a 128M test file with dd at a range of different block sizes, from the default of 512 bytes to a maximum of 64M. Be warned, this script uses dd internally, so use with caution.
dd_obs_test.sh:
#!/b...
Detecting Unsaved Changes
...
This script is awesome, but for me it also displayed the warning message upon submitting my form. I fixed this by unbinding the event in an onClick (onclick="window.onbeforeunload=null")
– Joost
...
JSP : JSTL's tag
...
c:out escapes HTML characters so that you can avoid cross-site scripting.
if person.name = <script>alert("Yo")</script>
the script will be executed in the second case, but not when using c:out
share...
Get bitcoin historical data [closed]
...their websocket in higher resolution over longer time period you could use script log_bitstamp_trades.py below.
The script uses python websocket-client and pusher_client_python libraries, so install them.
#!/usr/bin/python
import pusherclient
import time
import logging
import sys
import datetime
...
How to find if div with specific id exists in jQuery?
...='display:none;'></div>" + name + "</div>");
} else {
alert('this record already exists');
}
});
Or, the non-jQuery version for this part (since it's an ID):
$("li.friend").live('click', function(){
name = $(this).text();
if(document.getElementById(name) == null) {
...
Parse string to date with moment.js
...t('DD-MM-YYYY'); var dateCalendarPart = moment(date).format('YYYY/MM/DD'); alert(date); alert(dateCalendarPart); Gives an invalid date error?????
– Andrew Day
Jun 15 '16 at 11:17
...
How to access the correct `this` inside a callback?
...data, transport) {
this.data = data;
transport.on('data', () => alert(this.data));
}
Don't use this
You actually don't want to access this in particular, but the object it refers to. That's why an easy solution is to simply create a new variable that also refers to that object. The varia...