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Mercurial — revert back to old version and continue from there
... [-r REV]
If later you commit, you will effectively create a new branch. Then you might continue working only on this branch or eventually merge the existing one into it.
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Running SSH Agent when starting Git Bash on Windows
....
# This is just a snippet. See the article above.
if ! agent_is_running; then
agent_start
ssh-add
elif ! agent_has_keys; then
ssh-add
fi
Other Resources:
"Getting ssh-agent to work with git run from windows command shell" has a similar script, but I'd refer to the GitHub article abo...
Can overridden methods differ in return type?
...pe R2, if and only if the following conditions hold:
If R1 is void then R2 is void.
If R1 is a primitive type, then R2 is identical to R1.
If R1 is a reference type then:
R1 is either a subtype of R2 or R1 can be converted to a subtype of R2 by unchecked conversion (§5.1.9), or
...
Is it bad practice to have a constructor function return a Promise?
...That should go in a method of your class. You want to mutate global state? Then call that procedure explicitly, not as a side effect of generating an object. This call can go right after the instantiation:
var engine = new Engine()
engine.displayPosts();
If that task is asynchronous, you can now ...
How to map and remove nil values in Ruby
I have a map which either changes a value or sets it to nil. I then want to remove the nil entries from the list. The list doesn't need to be kept.
...
How do I check to see if a value is an integer in MySQL?
...u want highest numeric value from this db column (in this case it is 9582) then this query will help you
SELECT Max(column_name) from table_name where column_name REGEXP '^[0-9]+$'
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How do I tell if a regular file does not exist in Bash?
...nt (similar to many other languages). Try this:
if [ ! -f /tmp/foo.txt ]; then
echo "File not found!"
fi
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In SQL, how can you “group by” in ranges?
...umber of occurences]
from (
select case
when score between 0 and 9 then ' 0- 9'
when score between 10 and 19 then '10-19'
else '20-99' end as range
from scores) t
group by t.range
or
select t.range as [score range], count(*) as [number of occurrences]
from (
select user_id,
...
In Bash, how can I check if a string begins with some value?
...t this way:
HOST=user1
if [[ $HOST == user1 ]] || [[ $HOST == node* ]] ;
then
echo yes1
fi
HOST=node001
if [[ $HOST == user1 ]] || [[ $HOST == node* ]] ;
then
echo yes2
fi
Which will echo
yes1
yes2
Bash's if syntax is hard to get used to (IMO).
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Some projects cannot be imported because they already exist in the workspace error in Eclipse
...ve been working on.. and keep getting this error after I select-- "import" then "import existing project" then click archive file, and then I click next, and this error comes up:
...