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Rails: Using build with a has_one association in rails
...dly if user belonged to profile(meaning user table has foreign_key profile_id in its table) then also building profile for user will work as mentioned above i.e but for new action only user.build_profile for edit user.build_profile if user.profile.nil? and if you want to build profile while cre...
Add margin above top ListView item (and below last) in Android
... is a pretty fine question about the layout of items in a ListView in Android.
5 Answers
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Can I use a collection initializer for Dictionary entries?
... "Bart" }
}
Note that you're effectively adding tuples of values.
As a sidenote: collection initializers contain arguments which are basically arguments to whatever Add() function that comes in handy with respect to compile-time type of argument. That is, if I have a collection:
class FooCollect...
AWS S3 copy files and folders between two buckets
...
A simplified example using the aws-sdk gem:
AWS.config(:access_key_id => '...', :secret_access_key => '...')
s3 = AWS::S3.new
s3.buckets['bucket-name'].objects['source-key'].copy_to('target-key')
If you want to perform the copy between different buckets, then specify the target bucke...
How do I clear stuck/stale Resque workers?
...ocessing jobs), you might want to try Resque.workers.each {|w| matches = w.id.match(/^[^:]*:([0-9]*):[^:]*$/); pid = matches[1]; w.unregister_worker unless w.worker_pids.include?(pid.to_s)} which will only unregister those workers which pids are not part of the known running pids. I do not know if ...
Disable scrolling in webview?
Until now I have been an iPhone developer only and now I have decided to give Android a whirl. Something I haven't been able to figure out on Android is how to programmatically prevent scrolling in a WebView ?
...
What part of Hindley-Milner do you not understand?
...] implies [below]".
If there are multiple expressions in [above], then consider them anded together; all of the [above] must be true in order to guarantee the [below].
: means has type
∈ means is in. (Likewise ∉ means "is not in".)
Γ is usually used to refer to an environment or context; in thi...
Canvas is stretched when using CSS but normal with “width” / “height” properties
I have 2 canvases, one uses HTML attributes width and height to size it, the other uses CSS:
8 Answers
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windbg 备忘 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...
r 修改寄存器
!process 0 0 calc.exe
!process 0 0 system
!process pid
.formats 000ab048
!dd
!pte
!ptov
!vtop
!pfn
~s
dg
!pcr
dv 显示变量值
源代码操作指令
.open，lsf，lsc，ls，l，lsp
Ctrl+O打开并查看源文件
windbg源代码不能跟踪当前指令行时...
Proper use of beginBackgroundTaskWithExpirationHandler
... its allotted time has expired.
Mine tend look something like this:
- (void) doUpdate
{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[self beginBackgroundUpdateTask];
NSURLResponse * response = nil;
NSError * error = nil;
...