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What's the difference between a proc and a lambda in Ruby?
...ns nil
proc.call(1,2,3) # prints out 1 and forgets about the extra arguments
2. Lambdas and procs treat the ‘return’ keyword differently
‘return’ inside of a lambda triggers the code right outside of the lambda code
def lambda_test
lam = lambda { return }
lam.call
put...
What is the Difference Between Mercurial and Git?
...heuristic like in Git, there is nothing in the model that precludes adding extra information to a snapshot, e.g., rename information. We do that in Mercurial.
– Martin Geisler
Jan 26 '11 at 9:05
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What is the fastest method for selecting descendant elements in jQuery?
...
@J-P, I mean it needs to take the extra bit of time to recognize that a scope is being passed to translate it into the $parent.find(".child"); command.
– Aaron Harun
Jul 5 '10 at 7:51
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Keystore type: which one to use?
... have covered JCEKS and PKCS12 today. For PKCS11, it involves hardware and extra configuration, need more time to compose it. pixelstech.net/article/… and pixelstech.net/article/…
– PixelsTech
Jan 5 '15 at 7:24
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A fast method to round a double to a 32-bit int explained
...I noticed that Lua uses a macro to round a double to a 32-bit int . I extracted the macro , and it looks like this:
3...
How are Python's Built In Dictionaries Implemented?
... ...
For a 64 bit machine, this could save up to 16 bytes per key per extra dictionary.
Shared Keys for Custom Objects & Alternatives
These shared-key dicts are intended to be used for custom objects' __dict__. To get this behavior, I believe you need to finish populating your __dict__ be...
C state-machine design [closed]
... an enum. It also makes for much cleaner code since you don't need all the extra cruft of function pointers or huge switch statements and while loops. Did I mention it's more efficient too?
Here's what a state machine might look like:
void state_machine() {
first_state:
// Do some stuff here
...
When to add what indexes in a table in Rails
...add:
add_index :photos, [:created_at, :version]
Note:
An index takes up extra space on the disk and makes it slower to create and update each record, because it has to rebuild each index.
Credit:
https://tomafro.net/2009/08/using-indexes-in-rails-choosing-additional-indexes, rails - created_at ...
Create a submodule repository from a folder and keep its git commit history
...it submodules using npm ;)
In the following answer, you will know how to extract a folder from a repository and make a git repository from it and then including it as a submodule instead of a folder.
Inspired from Gerg Bayer's article Moving Files from one Git Repository to Another, Preserving Hi...
Make git automatically remove trailing whitespace before committing
...ave you in a weird state. I borrowed from this question and just added an extra case before the if: fixws = !"\ if test -d $(git rev-parse --git-dir)/rebase-merge ; then \ echo 'In rebase - cannot fixws' ; \ elif (! git diff-files --quiet .) && \ (! git diff-index --quiet ...