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How to retrieve a single file from a specific revision in Git?
...is indeed
git show object
git show $REV:$FILE
git show somebranch:from/the/root/myfile.txt
git show HEAD^^^:test/test.py
The command takes the usual style of revision, meaning you can use any of the following:
branch name (as suggested by ash)
HEAD + x number of ^ characters
The SHA1 hash of a giv...
How to add google chrome omnibox-search support for your site?
... [TAB] Feature for/on personal website?
You then add this XML file to the root of your site, and link to it in your <head> tag:
<link rel="search" type="application/opensearchdescription+xml" title="Stack Overflow" href="/opensearch.xml" />
Now, visitors to your page will automatical...
Sass .scss: Nesting and multiple classes?
...ay want to go more classes up than one. In this case you could try the @at-root and #{} css features which would enable two root classes to sit next to each other using &.
This wouldn't work (due to the nothing before & rule):
container {
background:red;
color:white;
...
What are the applications of binary trees?
...hing when you balance them. This involves rotating sub-trees through their root node so that the height difference between any two sub-trees is less than or equal to 1. Adding those names above one at a time into a balanced tree would give you the following sequence:
1. Alice
/ \
= ...
Setting environment variables via launchd.conf no longer works in OS X Yosemite/El Capitan/macOS Sie
...vironment variables definition:
$ ls -la /etc/environment
-r-xr-xr-x 1 root wheel 369 Oct 21 04:42 /etc/environment
$ cat /etc/environment
#!/bin/sh
set -e
syslog -s -l warn "Set environment variables with /etc/environment $(whoami) - start"
launchctl setenv JAVA_HOME /usr/local/jdk1.7...
Force point (“.”) as decimal separator in java
...ing.format which lets you specify the locale:
return String.format(Locale.ROOT, "%.2f", someDouble);
If you're only formatting a number - as you are here - then using NumberFormat would probably be more appropriate. But if you need the rest of the formatting capabilities of String.format, this sh...
What is the difference between gmake and make?
...gmake is soft link to make):
-> ls -l $(which gmake make)
lrwxrwxrwx 1 root root 4 Jun 5 2007 /usr/bin/gmake -> make
-rwxr-xr-x 1 root root 168976 Jul 13 2006 /usr/bin/make
gmake stands for GNU make. There're different implementations of make. On Linux machine most probably make wil...
How can “while (i == i) ;” be a non-infinite loop in a single threaded application?
...magic value within a calculation. Because a calculation failed - eg square root of a negative, divide by zero etc - it makes no sense in comparing them against anything else. After all if divide by zero is a nan is it equivalent to the square root of -2 or square root of -3 ?
Nan allows a calculati...
accepting HTTPS connections with self-signed certificates
...mportant parts from my blog article here:
Grab all required certificates (root and any intermediate CA’s)
Create a keystore with keytool and the BouncyCastle provider and import the certs
Load the keystore in your android app and use it for the secured connections (I recommend to use the Apache H...
How do I set up DNS for an apex domain (no www) pointing to a Heroku app?
...
(Note: root, base, apex domains are all the same thing. Using interchangeably for google-foo.)
Traditionally, to point your apex domain you'd use an A record pointing to your server's IP. This solution doesn't scale and isn't viabl...