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Why do I get AttributeError: 'NoneType' object has no attribute 'something'?
...
Consider the code below.
def return_something(someint):
if someint > 5:
return someint
y = return_something(2)
y.real()
This is going to give you the error
AttributeError: 'NoneType' object has no attribute 'real'
So points are as below.
...
How to convert a std::string to const char* or char*?
...hat needs const char* you can use
std::string str;
const char * c = str.c_str();
If you want to get a writable copy, like char *, you can do that with this:
std::string str;
char * writable = new char[str.size() + 1];
std::copy(str.begin(), str.end(), writable);
writable[str.size()] = '\0'; // ...
How to make a SPA SEO crawlable?
..."!">. This tag will make google's bot transform the URL to www.xyz.com?_escaped_fragment_= which we'll see later.
The 'about' route is just an example to a link to other 'pages' you may want on your web application.
Now, the tricky part is that there is no 'category' route, and there may be many...
How to Free Inode Usage?
...ries that contain lots of files, this script may help:
#!/bin/bash
# count_em - count files in all subdirectories under current directory.
echo 'echo $(ls -a "$1" | wc -l) $1' >/tmp/count_em_$$
chmod 700 /tmp/count_em_$$
find . -mount -type d -print0 | xargs -0 -n1 /tmp/count_em_$$ | sort -n
rm ...
Java 7 language features with Android
...tch
Multiple-catch (catch (Exc1 | Exc2 e))
Underscore in number literals (1_234_567)
Binary literals (0b1110111)
And these features cannot be used yet:
The try-with-resources statement — because it requires the non-existing interface "java.lang.AutoCloseable" (this can be used publicly in 4.4+...
Android Notification Sound
... code:
Uri alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
builder.setSound(alarmSound);
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What is the purpose of “return await” in C#?
...ss, in first case you should return foo.DoAnotherThingAsync().ContinueWith(_ => foo.Dispose());
– ghord
Sep 23 '14 at 8:58
7
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MongoDB Many-to-Many Association
...intain the roles in separate documents then you can include the document's _id in the roles array instead of the name:
{name:"Joe"
,roles:["4b5783300334000000000aa9","5783300334000000000aa943","6c6793300334001000000006"]
}
and set up the roles like:
{_id:"6c6793300334001000000006"
,rolename:"Eng...
In Python, when should I use a function instead of a method?
... as cars. You mention a duck, so let's go with that.
class duck:
def __init__(self):pass
def eat(self, o): pass
def crap(self) : pass
def die(self)
....
In the context of the "objects are real things" analogy, it is "correct" to add a class method for anything which the obje...
How to get IntPtr from byte[] in C#
... the Fixed keyword instead of using the GC
– goodguys_activate
Dec 17 '12 at 21:59
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