joakin

# If you don't remember the exact path/name, search the log for deleted files
git log --diff-filter=D --summary | grep delete
# Find the file you want to get from the ouput, and use the path
# Find the commits that involved that path
git log --all -- some/path/to/deleted.file
# Bring the file back to life to the current repo (sha commit of parent of commit that deleted)
git checkout shaofthecommitthatdeletedthefile^ -- some/path/to/deleted.file

tsiege

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!






\

ubershmekel

"""
Convert LocationHistory.json from Google takeout of location history (latitude)
to a usable KML file for viewing in Google Earth.


Usage: 

    python json_history_to_kml.py LocationHistory.json

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD