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Guards vs. if-then-else vs. cases in Haskell
...rwise" and = as "is" or "be"), you're probably doing something right.
if..then..else is for when you have one binary condition, or one single decision you need to make. Nested if..then..else-expressions are very uncommon in Haskell, and guards should almost always be used instead.
let absOfN =
i...
How to install CocoaPods?
...erred too many links and tried, but had no success. If any one has an idea then please please share with me. I read cocoa pods documents and many times tried to install but always failed because of the starting steps. I found one error whereby I can't install gems first. Can anyone give me the steps...
Exception thrown in catch and finally clause
...n in a catch block or finally block that will propagate out of that block, then the current exception will be aborted (and forgotten) as the new exception is propagated outward. The new exception starts unwinding up the stack just like any other exception, aborting out of the current block (the cat...
Is it possible to specify condition in Count()?
...nly counts the non-null values:
select count(case Position when 'Manager' then 1 else null end)
from ...
You can also use the sum aggregate in a similar way:
select sum(case Position when 'Manager' then 1 else 0 end)
from ...
...
Ternary operation in CoffeeScript
...ssion, and thus results in a value, you can just use if/else.
a = if true then 5 else 10
a = if false then 5 else 10
You can see more about expression examples here.
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What is the difference among col-lg-*, col-md-* and col-sm-* in Bootstrap?
...n one of two ways:
If you think of the columns starting out horizontally, then you can choose when you want them to stack.
For example, if you start with columns:
A B C
You decide when should they stack to be like this:
A
B
C
If you choose col-lg, then the columns will stack when the widt...
SQL MAX of multiple columns?
...ent:
SELECT
CASE
WHEN Date1 >= Date2 AND Date1 >= Date3 THEN Date1
WHEN Date2 >= Date1 AND Date2 >= Date3 THEN Date2
WHEN Date3 >= Date1 AND Date3 >= Date2 THEN Date3
ELSE Date1
END AS MostRecentDate
...
How to close Android application?
...st way to do this is put a method like the following in a helper class and then call it whenever the app needs to be killed. For example in the destroy method of the root activity (assuming that the app never kills this activity):
Also Android will not notify an application of the HOME key event, ...
T-SQL: Using a CASE in an UPDATE statement to update certain columns depending on a condition
...d. You could do this:
update table set
columnx = (case when condition then 25 else columnx end),
columny = (case when condition then columny else 25 end)
This is semantically the same, but just bear in mind that both columns will always be updated. This probably won't cause you any proble...
What are the differences between git branch, fork, fetch, merge, rebase and clone?
...eserve the main code (the 'master' branch), make a copy (a new branch) and then work within that new branch. If the work takes a while or master gets a lot of updates since the branch was made then merging or rebasing (often preferred for better history and easier to resolve conflicts) against the ...