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Returning value from called function in a shell script
...options:
1. Echo strings
lockdir="somedir"
testlock(){
retval=""
if mkdir "$lockdir"
then # Directory did not exist, but it was created successfully
echo >&2 "successfully acquired lock: $lockdir"
retval="true"
else
echo >&2 "cannot acquire ...
Type definition in object literal in TypeScript
...n object literal, not an class object. Also an interface can have methods. If your interface defines a method, then the object literal must also define it - it won't be null. The object literal must fulfill everything the the interface defines or the type system will show an error.
...
How to check whether a variable is a class or not?
...
If you also want inspect.isclass to return True if the object to inspect is a class instance, use inspect.isclass(type(Myclass()))
– michaelmeyer
Apr 18 '13 at 16:21
...
What does “default” mean after a class' function declaration?
... the compiler-generated version of that function, so you don't need to specify a body.
You can also use = delete to specify that you don't want the compiler to generate that function automatically.
With the introduction of move constructors and move assignment operators, the rules for when automat...
Command Prompt - How to add a set path only for that batch file executing?
Basically, I know I can go through my control panel and modify the path variable. But, I'm wondering if there is a way to through batch programming have a temporary path included? That way it is only used during that batch file execution. I don't want to have people go in and modify their path varia...
ImportError: No module named apiclient.discovery
...f the library.
At some point, it was switched over to be googleapiclient.
If your code is running on Google App Engine, both should work.
If you are running the application yourself, with the google-api-python-client installed, both should work as well.
Although, if we take a look at the source c...
What is the point of “final class” in Java?
...of all, I recommend this article: Java: When to create a final class
If they do, when do they use it so I can understand it better and know when to use it.
A final class is simply a class that can't be extended.
(It does not mean that all references to objects of the class would act as if t...
How can you use an object's property in a double-quoted string?
...ll be replaced by that variable's value:
$foo = 2
"$foo"
becomes
"2"
If you don't want that you have to use single quotes:
$foo = 2
'$foo'
However, if you want to access properties, or use indexes on variables in a double-quoted string, you have to enclose that subexpression in $():
$foo =...
How to implement “select all” check box in HTML?
...s_name); It's better than hard-coding the name and making the function specific to a particular set of checkboxes.
– ADTC
Apr 2 '16 at 4:39
...
How to find third or nth maximum salary from salary table?
...
Use ROW_NUMBER(if you want a single) or DENSE_RANK(for all related rows):
WITH CTE AS
(
SELECT EmpID, EmpName, EmpSalary,
RN = ROW_NUMBER() OVER (ORDER BY EmpSalary DESC)
FROM dbo.Salary
)
SELECT EmpID, EmpName, EmpSalar...