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What is `params.require(:person).permit(:name, :age)` doing in Rails 4?
...ethods such as require and permit.
The require method ensures that a specific parameter is present, and if it's not provided, the require method throws an error. It returns an instance of ActionController::Parameters for the key passed into require.
The permit method returns a copy of the paramet...
How to handle multiple heterogeneous inputs with Logstash?
Let's say you have 2 very different types of logs such as technical and business logs and you want:
3 Answers
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WinDbg基础资料（日本語） - IT优秀资料 - 清泛网 - 专注C/C++及内核技术
... Commands
参考資料:
http://www.windbg.info/download/doc/pdf/WinDbg_A_to_Z_color_JP.pdf
①PDB設定
.sympath
.sympath SRV*c:\symbols*http://msdl.microsoft.com/download/symbols;c:\Symbols\mydll
環境変数:
_NT_SYMBOL_PATH
SRV*C:\Symbols*http://msdl.microsoft.com/download/symbol...
How to minify php page html output?
I am looking for a php script or class that can minify my php page html output like google page speed does.
13 Answers
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How to import an existing X.509 certificate and private key in Java keystore to use in SSL?
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Note 2: You might want to add the -chain option to preserve the full certificate chain. (Thanks Mafuba)
Step two: Convert the pkcs12 file to a Java keystore
keytool -importkeystore \
-deststorepass [changeit] -destkeypass [changeit] -destkeystore server.keystore \
-srckeystore se...
Pull to refresh UITableView without UITableViewController
...l.addTarget(self, action: #selector(refresh(_:)), for: .valueChanged)
if #available(iOS 10.0, *) {
tableView.refreshControl = refreshControl
} else {
tableView.backgroundView = refreshControl
}
}
@objc func refresh(_ refreshControl: UIRefreshControl) {
// Do your jo...
How to determine the content size of a UIWebView?
I have a UIWebView with different (single page) content. I'd like to find out the CGSize of the content to resize my parent views appropriately. The obvious -sizeThatFits: unfortunately just returns the current frame size of the webView.
...
What's the difference between EscapeUriString and EscapeDataString?
...at
That's a valid URI (try it), and EscapeUriString will not modify it.
Now consider querying Google for "happy c++":
https://www.google.com/?q=happy+c++
That's a valid URI (try it), but it produces a search for "happy c", because the two pluses are interpreted as spaces. To fix it, we can ...
Why does parseInt yield NaN with Array#map?
...ent, the index of the element, and the Array object being traversed."
So if you call a function parseInt which actually expects two arguments, the second argument will be the index of the element.
In this case, you ended up calling parseInt with radix 0, 1 and 2 in turn. The first is the same as...
How to trace the path in a Breadth-First Search?
...this seems much cleaner. Would it be possible to make a graph if you only know the start and the end but none of the nodes in-between? Or even another approach besides graphs?
– Christopher Markieta
Jan 19 '12 at 7:19
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