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Exit codes in Python
I got a message saying script xyz.py returned exit code 0 . What does this mean?
13 Answers
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String concatenation: concat() vs “+” operator
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No, not quite.
Firstly, there's a slight difference in semantics. If a is null, then a.concat(b) throws a NullPointerException but a+=b will treat the original value of a as if it were null. Furthermore, the concat() method only accepts String values while the + operator will silently convert th...
The specified named connection is either not found in the configuration, not intended to be used wit
...y framework object and when I add it to my project, the connectionstring
is added to app.config in the connectionstring section, but when I want to create new entitycontext and use this connectionstring , this error appears
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How to len(generator()) [duplicate]
...erators are very useful. They have advantages over functions that return lists. However, you could len(list_returning_function()) . Is there a way to len(generator_function()) ?
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Meaning of $? (dollar question mark) in shell scripts
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This is the exit status of the last executed command.
For example the command true always returns a status of 0 and false always returns a status of 1:
true
echo $? # echoes 0
false
echo $? # echoes 1
From the manual: (aces...
urlencode vs rawurlencode?
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It will depend on your purpose. If interoperability with other systems is important then it seems rawurlencode is the way to go. The one exception is legacy systems which expect the query string to follow form-encoding style of spaces encoded as + instead of %20 (in which case you need urlencode...
.htm vs .html ? Which file extension naming is more correct? [closed]
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The short answer
There is none. They are exactly the same.
The long answer
Both .htm and .html are exactly the same and will work in the same way. The choice is down to personal preference, provided you’re consistent with your file naming you w...
Convert interface{} to int
...erenced specs parts:
Conversions are expressions of the form T(x) where T is a type and x is an expression that can be converted to type T.
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A non-constant value x can be converted to type T in any of these cases:
x is assignable to T.
x's type and T have identical underlying types.
x's type ...
What is the best way to concatenate two vectors?
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answered Jul 5 '10 at 4:39
Kirill V. LyadvinskyKirill...
Why does an SSH remote command get fewer environment variables then when run manually? [closed]
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There are different types of shells. The SSH command execution shell is a non-interactive shell, whereas your normal shell is either a login shell or an interactive shell. Description follows, from man bash:
A login shell is one whose first character of argument
zero is a -...