大约有 44,000 项符合查询结果（耗时：0.0362秒） [XML]
How to store custom objects in NSUserDefaults
Alright, so I've been doing some poking around, and I realize my problem, but I don't know how to fix it. I have made a custom class to hold some data. I make objects for this class, and I need to them to last between sessions. Before I was putting all my information in NSUserDefaults , but this...
Can you nest html forms?
...
In a word, no. You can have several forms in a page but they should not be nested.
From the html5 working draft:
4.10.3 The form element
Content model:
Flow content, but with no form element descendants.
...
How to remove a field from params[:something]
My registration form, which is a form for the Users model, takes a string value for company. However, I have just made a change such that users belongs_to companies. Therefore, I need to pass an object of Company to the Users model.
...
Is there a way to iterate over a dictionary?
I know NSDictionaries as something where you need a key in order to get a value . But how can I iterate over all keys and values in a NSDictionary , so that I know what keys there are, and what values there are? I know there is something called a for-in-loop in JavaScript . Is there som...
How to add calendar events in Android?
I'm just getting up to speed on Android, and today in a project meeting someone said that Android has no native calendar app so users just use whatever calendar app they like.
...
Check whether user has a Chrome extension installed
I am in the process of building a Chrome extension, and for the whole thing to work the way I would like it to, I need an external JavaScript script to be able to detect if a user has my extension installed.
...
How can I get the domain name of my site within a Django template?
How do I get the domain name of my current site from within a Django template? I've tried looking in the tag and filters but nothing there.
...
Using “Object.create” instead of “new”
Javascript 1.9.3 / ECMAScript 5 introduces Object.create , which Douglas Crockford amongst others has been advocating for a long time. How do I replace new in the code below with Object.create ?
...
Fragments within Fragments
I'm wondering if this is actually a bug in the Android API:
6 Answers
6
...
Fastest way to determine if record exists
As the title suggests... I'm trying to figure out the fastest way with the least overhead to determine if a record exists in a table or not.
...