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Is git's semi-secret empty tree object reliable, and why is there not a symbolic name for it?
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This thread mentions:
If you don't remember the empty tree sha1, you can always derive it with:
git hash-object -t tree /dev/null
Or, as Ciro Santilli proposes in the comments:
printf '' | git hash-object --stdin -t tree
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How to checkout a specific Subversion revision from the command line?
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If you already have it checked out locally then you can cd to where it is checked out, then use this syntax:
$ svn up -rXXXX
ref: Checkout a specific revision from subversion from command line
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get just the integer from wc in bash
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whoops, just re-read the question.. #fail, i was researching how to get just the integers, and i was using information from one of the answers, when i discovered a better answer, and then decided to post about it. sorry..
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Array_merge versus + [duplicate]
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The example code is great, however hard to read. Would be much better if it was formatted correctly...
– Yep_It's_Me
Mar 12 '18 at 5:35
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Convert decimal to hexadecimal in UNIX shell script
...e you mean convert hex to dec. To do that, set ibase=16. You might like to read the manual on bc for more details.
– Bill Karwin
May 28 '15 at 1:58
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Dump Mongo Collection into JSON format
...V. You can specify a filter for the query, or a list of fields to output
Read more here: http://www.mongodb.org/display/DOCS/mongoexport
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Get element from within an iFrame
...innerDoc = iframe.contentDocument || iframe.contentWindow.document; //more readable and means the same
– David Snabel-Caunt
Jul 6 '09 at 18:40
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How do I repeat an edit on multiple lines in Vim?
...ptures initial whitespace and saves it into a register, which you can then read with \1.
– Svante
Dec 10 '08 at 12:59
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How can I stop a running MySQL query?
... then I run a SELECT query that is too big. It prints and prints and I already know this is not what I meant. I would like to stop the query.
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How to update column with null value
...ause PHPMyAdmin claimed there was an unrecognised keyword near NULL. After reading your answer, I ran the query and it executed as intended.
– dading84
Aug 2 '16 at 10:06
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