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Direct casting vs 'as' operator?
... tend to almost never use 2 since if something is not the right type, I usually expect an exception to occur. I have only seen a need for this return-null type of functionality with badly designed libraries which use error codes (e.g. return null = error, instead of using exceptions).
3 is not a ca...
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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Throw HttpResponseException or return Request.CreateErrorResponse?
... // If no exception handler registered for the exception type, fallback to default handler
actionExecutedContext.Response = DefaultHandler(
actionExecutedContext.Exception.GetBaseException(), actionExecutedContext.Request
);
...
NSUserDefaults - How to tell if a key exists
I'm working on a small iPhone app, and I am using NSUserDefaults as my data persistence. It only has to keep track of a few things, such as some names and some numbers so I figure I might as well keep it simple.
...
How to convert a number to string and vice versa in C++
...o-number conversion and vice-versa are built in into the standard library. All the following functions are present in <string> (as per paragraph 21.5).
string to numeric
float stof(const string& str, size_t *idx = 0);
double stod(const string& str, size_t *id...
How to resize a VirtualBox vmdk file
... iso from within the virtualbox settings).
P.S. If your new size is too small, you'll get the same error even with your new vdi file.
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Escape string for use in Javascript regex [duplicate]
...mp;'); // $& means the whole matched string
}
Example
escapeRegExp("All of these should be escaped: \ ^ $ * + ? . ( ) | { } [ ]");
>>> "All of these should be escaped: \\ \^ \$ \* \+ \? \. \( \) \| \{ \} \[ \] "
(NOTE: the above is not the original answer; it was edited to show th...
What are my environment variables? [closed]
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I am not sure if thats what you want, but try printenv
This will show you all your environment variables.
About where they are stored
Linux: where are environment variables stored?
How to set Shell Environment Variables
http://www.codecoffee.com/tipsforlinux/articles/030.html
Happy reading :-)...
Obscure a UITextField password
... Is there a way that I can even hide the character to be displayed at all? I don't want the character to be seen at all.
– Maninder Singh
Aug 1 '19 at 3:51
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Python initializing a list of lists [duplicate]
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The problem is that they're all the same exact list in memory. When you use the [x]*n syntax, what you get is a list of n many x objects, but they're all references to the same object. They're not distinct instances, rather, just n references to the sam...