diff options
| author | Paul Buetow <paul@buetow.org> | 2024-04-30 13:14:09 +0300 |
|---|---|---|
| committer | Paul Buetow <paul@buetow.org> | 2024-04-30 13:14:09 +0300 |
| commit | 07c56086aa0c4e015c9044e333ae4001debcb28d (patch) | |
| tree | 2b2c0a3dae32313d55c6f223095612dcf0b7d779 /gemfeed/2023-12-10-bash-golf-part-3.html | |
| parent | 5ad16713db1f011c08d2db602ed5b1d3294f0939 (diff) | |
Update content for html
Diffstat (limited to 'gemfeed/2023-12-10-bash-golf-part-3.html')
| -rw-r--r-- | gemfeed/2023-12-10-bash-golf-part-3.html | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/gemfeed/2023-12-10-bash-golf-part-3.html b/gemfeed/2023-12-10-bash-golf-part-3.html index bd9b3521..021faf6f 100644 --- a/gemfeed/2023-12-10-bash-golf-part-3.html +++ b/gemfeed/2023-12-10-bash-golf-part-3.html @@ -8,7 +8,7 @@ <link rel="stylesheet" href="style-override.css" /> </head> <body> -<h1 style='display: inline'>Bash Golf Part 3</h1><br /> +<h1 style='display: inline' id='BashGolfPart3'>Bash Golf Part 3</h1><br /> <br /> <span class='quote'>Published at 2023-12-10T11:35:54+02:00</span><br /> <br /> @@ -29,7 +29,7 @@ jgs^^^^^^^`^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ <a class='textlink' href='./2022-01-01-bash-golf-part-2.html'>2022-01-01 Bash Golf Part 2</a><br /> <a class='textlink' href='./2023-12-10-bash-golf-part-3.html'>2023-12-10 Bash Golf Part 3 (You are currently reading this)</a><br /> <br /> -<h2 style='display: inline'><span class='inlinecode'>FUNCNAME</span></h2><br /> +<h2 style='display: inline' id='FUNCNAME'><span class='inlinecode'>FUNCNAME</span></h2><br /> <br /> <span><span class='inlinecode'>FUNCNAME</span> is an array you are looking for a way to dynamically determine the name of the current function (which could be considered the callee in the context of its own execution), you can use the special variable <span class='inlinecode'>FUNCNAME</span>. This is an array variable that contains the names of all shell functions currently in the execution call stack. The element <span class='inlinecode'>FUNCNAME[0]</span> holds the name of the currently executing function, <span class='inlinecode'>FUNCNAME[1]</span> the name of the function that called that, and so on.</span><br /> <br /> @@ -69,7 +69,7 @@ http://www.gnu.org/software/src-highlite --> INFO<font color="#990000">|</font><font color="#993399">20231210</font>-<font color="#993399">082732</font><font color="#990000">|</font><font color="#993399">123002</font><font color="#990000">|</font>at_home_friday_evening<font color="#990000">|</font>One Peperoni Pizza<font color="#990000">,</font> please </pre> <br /> -<h2 style='display: inline'><span class='inlinecode'>:(){ :|:& };:</span></h2><br /> +<h2 style='display: inline' id=''><span class='inlinecode'>:(){ :|:& };:</span></h2><br /> <br /> <span>This one may be widely known already, but I am including it here as I found a cute image illustrating it. But to break <span class='inlinecode'>:(){ :|:& };:</span> down:</span><br /> <br /> @@ -92,7 +92,7 @@ INFO<font color="#990000">|</font><font color="#993399">20231210</font>-<font co <br /> <a href='./2023-12-10-bash-golf-part-3/bash-fork-bomb.jpg'><img alt='Bash fork bomb' title='Bash fork bomb' src='./2023-12-10-bash-golf-part-3/bash-fork-bomb.jpg' /></a><br /> <br /> -<h2 style='display: inline'>Inner functions</h2><br /> +<h2 style='display: inline' id='Innerfunctions'>Inner functions</h2><br /> <br /> <span>Bash defines variables as it is interpreting the code. The same applies to function declarations. Let's consider this code:</span><br /> <br /> @@ -161,7 +161,7 @@ Wintel inside! Wintel inside! </pre> <br /> -<h2 style='display: inline'>Exporting functions</h2><br /> +<h2 style='display: inline' id='Exportingfunctions'>Exporting functions</h2><br /> <br /> <span>Have you ever wondered how to execute a shell function in parallel through <span class='inlinecode'>xargs</span>? The problem is that this won't work:</span><br /> <br /> @@ -251,7 +251,7 @@ http://www.gnu.org/software/src-highlite --> <br /> <span>... because <span class='inlinecode'>some_other_function</span> isn't exported! You will also need to add an <span class='inlinecode'>export -f some_other_function</span>!</span><br /> <br /> -<h2 style='display: inline'>Dynamic variables with <span class='inlinecode'>local</span></h2><br /> +<h2 style='display: inline' id='Dynamicvariableswithlocal'>Dynamic variables with <span class='inlinecode'>local</span></h2><br /> <br /> <span>You may know that <span class='inlinecode'>local</span> is how to declare local variables in a function. Most don't know that those variables actually have dynamic scope. Let's consider the following example:</span><br /> <br /> @@ -291,7 +291,7 @@ foo <span>What happened? The variable <span class='inlinecode'>foo</span> (declared with <span class='inlinecode'>local</span>) is available in the function it was declared in and in all other functions down the call stack! We can even modify the value of <span class='inlinecode'>foo</span>, and the change will be visible up the call stack. It's not a global variable; on the last line, <span class='inlinecode'>echo "$foo"</span> echoes the global variable content.</span><br /> <br /> <br /> -<h2 style='display: inline'><span class='inlinecode'>if</span> conditionals</h2><br /> +<h2 style='display: inline' id='ifconditionals'><span class='inlinecode'>if</span> conditionals</h2><br /> <br /> <span>Consider all variants here more or less equivalent:</span><br /> <br /> @@ -342,7 +342,7 @@ ok4a ok4b </pre> <br /> -<h2 style='display: inline'>Multi-line comments</h2><br /> +<h2 style='display: inline' id='Multilinecomments'>Multi-line comments</h2><br /> <br /> <span>You all know how to comment. Put a <span class='inlinecode'>#</span> in front of it. You could use multiple single-line comments or abuse heredocs and redirect it to the <span class='inlinecode'>:</span> no-op command to emulate multi-line comments. </span><br /> <br /> @@ -366,7 +366,7 @@ COMMENT <br /> <span>I will not demonstrate the execution of this script, as it won't print anything! It's obviously not the most pretty way of commenting on your code, but it could sometimes be handy!</span><br /> <br /> -<h2 style='display: inline'>Don't change it while it's executed</h2><br /> +<h2 style='display: inline' id='Dontchangeitwhileitsexecuted'>Don't change it while it's executed</h2><br /> <br /> <span>Consider this script:</span><br /> <br /> |