大约有 830 项符合查询结果（耗时：0.0366秒） [XML]
Why is Everyone Choosing JSON Over XML for jQuery? [closed]
...uld build up a dictionary like follows:
conditions = {
'new_snow_24': 5.0,
'new_snow_48': 8.5,
'base_depth': 88.0,
'comments': 'Deep and steep!',
'chains_required': True,
}
return simplejson.dumps(conditions) # Encode and dump `conditions` as a JSON string
When translated th...
Why “decimal” is not a valid attribute parameter type?
...at you're quoting an old version of the spec. In C# versions 3.0, 4.0, and 5.0, it is stated that it can also have type sbyte, ushort, uint, ulong. And that seems to work all right. But still decimal is not allowed :-(
– Jeppe Stig Nielsen
Sep 19 '12 at 10:56
...
How do I read any request header in PHP
...string(9) "localhost"
// ["User-Agent"]=>
// string(108) "Mozilla/5.0 (Windows NT 6.1; WOW64) [...]"
// }
Earlier this function worked only when PHP was running as an Apache/NSAPI module.
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How to name variables on the fly?
...# 4 4.6 3.1 1.5 0.2 setosa
# 5 5.0 3.6 1.4 0.2 setosa
# 6 5.4 3.9 1.7 0.4 setosa
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imp...
Ignoring a class property in Entity Framework 4.1 Code First
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As of EF 5.0, you need to include the System.ComponentModel.DataAnnotations.Schema namespace.
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Rails 4: before_filter vs. before_action
... before_filter.
However all before_filters syntax are deprecated in Rails 5.0 and will be removed in Rails 5.1
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Run a callback only if an attribute has changed in Rails
...e_to_<attribute>?
<attribute>_before_last_save
Rails <= 5.0
class Page < ActiveRecord::Base
before_save :do_something, if: :status_id_changed?
private
def do_something
# ...
end
end
This utilizes the fact that the before_save callback can conditionally execute ...
Using jQuery To Get Size of Viewport
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I tested this on Windows IE6, IE8, FF3.6.3, Google Chrome 5.0.375.70, Opera 10.53, and Safari 5.0 (7533.16). This works consistently on all of these. I also tested FF3.6.3 on Ubuntu and it works there too. I think I'm using jQuery 1.3 with WordPress 2.9.2, which is where I needed th...
NSUserDefaults removeObjectForKey vs. setObject:nil
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Swift 5.0 + iOS 11 and up
Both methods remove the value. Tried this in a playground:
import Foundation
let key = "Test"
let value = "test"
let defaults = UserDefaults.standard
func printUD() {
print("UserDefaults after modi...
Which MySQL data type to use for storing boolean values
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For MySQL 5.0.3 and higher, you can use BIT. The manual says:
As of MySQL 5.0.3, the BIT data type is used to store bit-field
values. A type of BIT(M) enables storage of M-bit values. M can range
from 1 to 64.
Otherwise, according to...