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Generating a list of which files changed between hg versions
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hg status --rev x:y
where x and y are desired revision numbers (or tag or branch names).
If you are using the terminal in windows add hg status --rev x:y> your-file.txt to save the list to a file.
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Check if list contains element that contains a string and get that element
...n into similar ones utilizing LINQ but I haven't been able to fully understand them (and thus, implement them), as I'm not familiarized with it. What I would like to, basically, is this:
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How to remove element from array in forEach loop?
... element in an array in a forEach loop, but am having trouble with the standard solutions I've seen.
7 Answers
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How do I write outputs to the Log in Android?
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Look into android.util.Log. It lets you write to the log with various log levels, and you can specify different tags to group the output.
For example
Log.w("myApp", "no network");
will output a warning with the tag myApp and the ...
Replacing a fragment with another fragment inside activity group
I have a fragment inside a group activity and I want to replace it with another fragment:
12 Answers
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Find rows that have the same value on a column in MySQL
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This query will give you a list of email addresses and how many times they're used, with the most used addresses first.
SELECT email,
count(*) AS c
FROM TABLE
GROUP BY email
HAVING c > 1
ORDER BY c DESC
If you want the full rows:
select * from table where email ...
Difference between OperationCanceledException and TaskCanceledException?
What is the difference between OperationCanceledException and TaskCanceledException ? If I am using .NET 4.5 and using the async / await keywords, which one should I be looking to catch?
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Should ol/ul be inside or outside?
Which is standard compliant between these two?
5 Answers
5
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Method call if not null in C#
...ke();
or:
obj?.SomeMethod();
The ?. is the null-propagating operator, and will cause the .Invoke() to be short-circuited when the operand is null. The operand is only accessed once, so there is no risk of the "value changes between check and invoke" problem.
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Prior to C# 6, no: there is no...
Difference between two lists
...Using Except is exactly the right way to go. If your type overrides Equals and GetHashCode, or you're only interested in reference type equality (i.e. two references are only "equal" if they refer to the exact same object), you can just use:
var list3 = list1.Except(list2).ToList();
If you need t...