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Xcode/Simulator: How to run older iOS version?
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To add previous iOS simulator to Xcode 4.2, you need old xcode_3.2.6_and_ios_sdk_4.3.dmg (or similar version) installer file and do as following:
Mount the xcode_3.2.6_and_ios_sdk_4.3.dmg file
Open mounting disk image and choose menu: Go->Go to Folder...
Type /Volumes/Xcode and iOS...
Django FileField with upload_to determined at runtime
...ng to set up my uploads so that if user joe uploads a file it goes to MEDIA_ROOT/joe as opposed to having everyone's files go to MEDIA_ROOT. The problem is I don't know how to define this in the model. Here is how it currently looks:
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How do I format a date in Jinja2?
...and print) the strftime() method in your template, for example
{{ car.date_of_manufacture.strftime('%Y-%m-%d') }}
Another, sightly better approach would be to define your own filter, e.g.:
from flask import Flask
import babel
app = Flask(__name__)
@app.template_filter()
def format_datetime(val...
Vim: apply settings on files in directory
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@JasonMcCarrell My implementation of local_vimrc and Markus "embear" Braun's one have support for blacklist, whitelist... If you just need to specify how indentation is done, may be EditorConfig-vim plugin would be a better choice.
– Luc Hermitt...
Passing Data between View Controllers
...A)
// in ContollerA.m
- (void)viewDidLoad {
[super viewDidLoad];
__unsafe_unretained typeof(self) weakSelf = self;
self.selectedVoucherBlock = ^(NSString *voucher) {
weakSelf->someLabel.text = voucher;
};
}
Go to Controller B
UIStoryboard *storyboard = [UIStoryboard s...
App Inventor 2 向心力实验App - 手机传感器探究向心力F与角速度ω、半径r...
...* ax + ay * ay)
// 计算向心力 F = m * a
var m = 文本输入框_质量.Text + 0
var r = 文本输入框_半径.Text + 0
global 向心力 = m * 向心加速度
标签_加速度.Text = join("加速度: ", 向心加速度, " m/s²")
标签_角速度.Text = join("角速度: ", 当...
How do I check if a list is empty?
...al consensus seems to be that duck typing wins out (in effect, saying that __nonzero__ is the interface for testing emptiness docs.python.org/reference/datamodel.html#object.__nonzero__)
– andrew cooke
May 31 '12 at 14:50
...
Can mustache iterate a top-level array?
...he');
var view = {test: 'div content', multiple : ['foo', 'bar'], multiple_2 : ['hello', 'world']};
var template = '<div>{{test}}</div><ul>{{#multiple}}<li>{{.}}</li>{{/multiple}}</ul><ul>{{#multiple_2}}<li>{{.}}</li>{{/multiple_2}}</ul>';...
jQuery: Select data attributes that aren't empty?
...his Code Snippet.
* Snippet is running jQuery v2.1.1
jQuery('div.test_1 > a[href]').addClass('match');
jQuery('div.test_2 > a[href!=""]').addClass('match');
jQuery('div.test_3 > a[href!=""][href]').addClass('match');
div,a {
display: block;
color: #333;
margin: 5px;
...
Javascript: best Singleton pattern [duplicate]
...lution found:
http://code.google.com/p/jslibs/wiki/JavascriptTips#Singleton_pattern
function MySingletonClass () {
if (arguments.callee._singletonInstance) {
return arguments.callee._singletonInstance;
}
arguments.callee._singletonInstance = this;
this.Foo = function () {
// ...
...