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NSDictionary - Need to check whether dictionary contains key-value pair or not
...uldn't we mistakenly think that the key isn't present in the dictionary at all?
– jbx72487
Feb 1 '13 at 18:51
13
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What is `params.require(:person).permit(:name, :age)` doing in Rails 4?
All the examples of strong parameters in Rails 4 docs use
2 Answers
2
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Difference between break and continue statement
...ile loops. The break statement will only break out of the current loop. In order to break out of an outer loop from a nested inner loop, you would need to use labels with the break statement.
for(int i=0; i<10; i++) {
System.out.println(i);
if(i==4) {
break;
}
}
Output:
0
1
2
3
4
...
Listing each branch and its last revision's date in Git
... Nice. I'd add "| tac" to the end to get it sorted in reverse order so the recently-touched branches are quickly visible.
– Ben
Oct 1 '13 at 18:56
1
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SSL handshake alert: unrecognized_name error since upgrade to Java 1.7.0
...etting this flag is that SNI is disabled everywhere in the application. In order to make use of SNI and still support misconfigured servers:
Create a SSLSocket with the host name you want to connect to. Let's name this sslsock.
Try to run sslsock.startHandshake(). This will block until it is done ...
how can you easily check if access is denied for a file in .NET?
...hat Dropbox is continually reading and writing files in the background, in order to sync them.
Guess where my Visual Studio Projects folder is located? Inside the "My Dropbox" folder of course.
Therefore as I ran my application in Debug mode, the files it was reading and writing were also con...
Does Java support default parameter values?
...is difficult. A definite case is where you have to differentiate using the order of parameters, not just number and type.
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What does the “~” (tilde/squiggle/twiddle) CSS selector mean?
...hey:
Are .b elements
Are siblings of .a
Appear after .a in HTML source order.
Likewise, .check:checked ~ .content matches all .content elements that are siblings of .check:checked and appear after it.
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How to import data from mongodb to pandas?
...ple how Dask helps to speedup execution even on a data fitting into memory by using multiple cores on a single machine.
– Dennis Golomazov
Sep 27 '16 at 23:53
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What's the difference between '$(this)' and 'this'?
...ecution context
The scope refers to the current Execution ContextECMA. In order to understand this, it is important to understand the way execution contexts operate in JavaScript.
execution contexts bind this
When control enters an execution context (code is being executed in that scope) the env...