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How to round to 2 decimals with Python?
...*100)/100) # -> 2.36
print(math.floor(v*100)/100) # -> 2.35
or:
from math import floor, ceil
def roundDown(n, d=8):
d = int('1' + ('0' * d))
return floor(n * d) / d
def roundUp(n, d=8):
d = int('1' + ('0' * d))
return ceil(n * d) / d
...
How does Rails keep track of which migrations have run for a database?
.... If you roll back that migration, Rails will delete the corresponding row from schema_migrations.
For example, running a migration file named 20120620193144_create_users.rb will insert a new row with a version of 20120620193144 into the schema_migrations table.
You are free at any point to introd...
Git, rewrite previous commit usernames and emails
...
I ran this command and now my repo won't push to or pull from the git server.
– Jesus H
Mar 30 '18 at 14:14
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show 3 more ...
Git: “Not currently on any branch.” Is there an easy way to get back on a branch, while keeping the
...ch. I would still go with babay's answer, but if you want to save yourself from writing two extra commands I guess this is the way to go.
– Erik B
Jul 8 '13 at 13:32
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Is null reference possible?
...ypeid is guaranteed to be thrown, even though you pass an lvalue resulting from a null pointer dereference semantically. But syntactically at the toplevel, it's not a dereference, but a comma operator expression.
– Johannes Schaub - litb
Dec 6 '10 at 9:15
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How to fix Error: listen EADDRINUSE while using nodejs?
... @UlyssesAlves just open a terminal window and kill the process from there.
– Nobita
Jan 5 '16 at 13:37
@No...
How to tag an older commit in Git?
...ection "On Backdating Tags" which says:
If you have imported some changes from another VCS and would like to add tags for major releases of your work, it is useful to be able to specify the date to embed inside of the tag object; such data in the tag object affects, for example, the ordering of tag...
Convert column classes in data.table
... You might want to add what names_factors is here. I guess it's taken from stackoverflow.com/a/20808945/1666063 so it's names_factors = c('fac1', 'fac2') in this case - which is column names.But it could also be column numbers for example 1;ncol(dt) which would convert all columns
...
Comparing Haskell's Snap and Yesod web frameworks
...st of the time it will be pretty easy to pull in the missing functionality from the other framework by importing the necessary package.
EDIT: For a more detailed comparison of the big three Haskell web frameworks check out my recent blog post. For a rougher (but possibly more useful) comparison us...
How do you clone a Git repository into a specific folder?
...
-t documentation from git: -t, --track When creating a new branch, set up "upstream" configuration. See "--track" in git-branch(1) for details.
– csomakk
Apr 19 '17 at 11:04
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