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What's a concise way to check that environment variables are set in a Unix shell script?
I've got a few Unix shell scripts where I need to check that certain environment variables are set before I start doing stuff, so I do this sort of thing:
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Is there a link to the “latest” jQuery library on Google APIs? [duplicate]
I use the following for a jQuery link in my <script> tags:
12 Answers
12
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Get Current Area Name in View or Controller
...ring linkText, string controller, string action, string area, string anchorTitle)
{
var urlHelper = new UrlHelper(htmlHelper.ViewContext.RequestContext);
var url = urlHelper.Action(action, controller, new { @area = area });
var anchor = new TagBuilder("a");
ancho...
How Do I Make Glyphicons Bigger? (Change Size?)
... be sent straight to your icon as the screen reader assumes it signifies a title/heading for the most important content on the page.
– Roy
Jul 24 '15 at 15:18
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Difference between sh and bash
...ons. Many of these extensions may change the behavior of valid POSIX shell scripts, so by itself bash is not a valid POSIX shell. Rather, it is a dialect of the POSIX shell language.
bash supports a --posix switch, which makes it more POSIX-compliant. It also tries to mimic POSIX if invoked as sh.
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How to find out what character key is pressed?
...hat character key is pressed in a cross-browser compatible way in pure Javascript.
8 Answers
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How to hash some string with sha256 in Java?
...encoding" absolutely right, but I must say I prefer the current question's title to "how to encrypt with sha" (many seem to think it's encryption). Perhaps we should treat it as encoding instead of something to do with cryptography because in practice that's closer to how it's used.
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Using curl POST with variables defined in bash script functions
...d be quoted.
First, write a function that generates the post data of your script. This saves you from all sort of headaches concerning shell quoting and makes it easier to read an maintain the script than feeding the post data on curl's invocation line as in your attempt:
generate_post_data()
{
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Is it possible to have a Subversion repository as a Git submodule?
...DIR=. git svn fetch
git gc
This sets up my bare repo, then I have a cron script to update it:
#!/usr/bin/python
import os, glob
GIT_HOME='/var/www/git'
os.chdir(GIT_HOME)
os.environ['GIT_DIR']='.'
gits = glob.glob('*.git')
for git in gits:
if not os.path.isdir(git):
continue
os.chdir(o...
How can I use swift in Terminal?
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In Xcode 6.1.1 with Command Line Tools installed you can execute scripts by referencing directly to /usr/bin/swift the following way:
#!/usr/bin/swift
let variable: String = "string"
print("Test \(variable)")
sh...