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How can i tell if an object has a key value observer attached
...SMutableArray like this:
- (void)addObservedObject:(id)object {
if (![_observedObjects containsObject:object]) {
[_observedObjects addObject:object];
}
}
If you want to unobserve the objects you can do something like:
for (id object in _observedObjects) {
if ([object isKindOf...
Convert Set to List without creating new List
...
It is easy to see that if you want to have a Map with Lists as values, in order to have k different values, you need to create k different lists.
Thus: You cannot avoid creating these lists at all, the lists will have to be created.
Possible work around:
Declare your Map as a Map<String,Set>...
How to add external library in IntelliJ IDEA?
...have a smaller
screen like me, you may have to drag resize to the right in order to
see it)
From the dropdown of Add options, choose "Library". A "Choose
Libraries" dialog will appear.
Press "New Library..."
Choose a suitable title for the library
Press "Attach Classes..."
Choose the Jar from your l...
Restore the state of std::cout after manipulating it
...lude <iostream> or #include <ios> then when required:
std::ios_base::fmtflags f( cout.flags() );
//Your code here...
cout.flags( f );
You can put these at the beginning and end of your function, or check out this answer on how to use this with RAII.
...
CSS hack大全 - 创意 - 清泛网 - 专注C/C++及内核技术
...0deff\9; /*IE6、7、8识别*/ +background-color:#a200ff;/*IE6、7识别*/ _background-color:#1e0bd1/*IE6识别*/}
@media screen and (-webkit-min-device-pixel-ratio:0){.bb{background-color:#f1ee18}}{} /* Safari(Chrome) 有效 */
@media all and (min-width: 0px){ .bb{background-color:#f1ee18;/*op...
How to customize the background/border colors of a grouped table view cell?
...kgroundView.h
//
// Created by Mike Akers on 11/21/08.
// Copyright 2008 __MyCompanyName__. All rights reserved.
//
#import <UIKit/UIKit.h>
typedef enum {
CustomCellBackgroundViewPositionTop,
CustomCellBackgroundViewPositionMiddle,
CustomCellBackgroundViewPositionBottom,
...
_csv.Error: field larger than field limit (131072)
...
The csv file might contain very huge fields, therefore increase the field_size_limit:
import sys
import csv
csv.field_size_limit(sys.maxsize)
sys.maxsize works for Python 2.x and 3.x. sys.maxint would only work with Python 2.x (SO: what-is-sys-maxint-in-python-3)
Update
As Geoff pointed out,...
Unique BooleanField value in Django?
...rn it off).
class Character(models.Model):
name = models.CharField(max_length=255)
is_the_chosen_one = models.BooleanField()
def save(self, *args, **kwargs):
if self.is_the_chosen_one:
try:
temp = Character.objects.get(is_the_chosen_one=True)
...
Convert XML to JSON (and back) using Javascript
... DOM Object to JSON
X2JS.json2xml - Convert JSON to XML DOM Object
X2JS.xml_str2json - Convert XML specified as string to JSON
X2JS.json2xml_str - Convert JSON to XML string
Online Demo on http://jsfiddle.net/abdmob/gkxucxrj/1/
var x2js = new X2JS();
function convertXml2JSon() {
$("#jsonArea")...
Binding a list in @RequestParam
...
there may be problems with the order (which is very important to keep in my case) because I send the parameters by serializing a form and sending i with ajax. I'll use the "traditional" @ModelAttribute way.
– Javi
Jan...