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Accessing last x characters of a string in Bash
... command substitution ? I'm trying to extract the last three characters of my hostname deppfx@localhost:/tmp$ echo ${$(hostname): -3} -bash: ${$(hostname): -3}: bad substitution
– deppfx
Aug 4 '15 at 1:34
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Guaranteed lifetime of temporary in C++?
... "That sort of temporaries" -- What sort is that? How can I tell if my temporary is "that sort" of temporary?
– R.M.
Apr 26 '19 at 20:08
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Difference between ProcessBuilder and Runtime.exec()
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@noah1989: thanks for the feedback. I've updated my answer to (hopefully) clarify things and in particular remove any mention of shells or cmd.exe.
– Luke Woodward
Oct 17 '14 at 22:41
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Disable git EOL Conversions
...others, but sometimes you need something specific for weird edge cases. In my case, I've downloaded some files and want to record changes I make so I can remember what I did (as opposed to tracking changes to code). I don't know if the line endings are important (and want diffs to make sense against...
Reference - What does this error mean in PHP?
...;html>
<?php session_start(); ?>
<head><title>My Page</title>
</html>
...
The session_start() function will try to send headers with the session cookie to the client. But PHP already sent headers when it wrote the <html> element to the output stream. ...
Is it possible to set private property via reflection?
... Just to safe someone elses hair (that have been just pulled out on my head): this won't work in Silverlight runtimes: msdn.microsoft.com/de-de/library/xb5dd1f1%28v=vs.95%29.aspx
– Marc Wittke
Apr 20 '12 at 10:04
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How do I validate a date string format in python?
... answered Jun 1 '13 at 8:23
jamylakjamylak
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Reference: What is variable scope, which variables are accessible from where and what are “undefined
... is within this global scope.
Example:
<?php
$foo = 'bar';
function myFunc() {
$baz = 42;
}
$foo is in the global scope, $baz is in a local scope inside myFunc. Only code inside myFunc has access to $baz. Only code outside myFunc has access to $foo. Neither has access to the other:
<...
For-each over an array in JavaScript
... 32-bit unsigned integer.) (Props to RobG for pointing out in a comment on my blog post that my previous test wasn't quite right.)
You wouldn't do that in inline code, of course. You'd write a utility function. Perhaps:
// Utility function for antiquated environments without `forEach`
var ha...
How are 3D games so efficient? [closed]
... have never understood. How can a great big PC game like GTA IV use 50% of my CPU and run at 60fps while a DX demo of a rotating Teapot @ 60fps uses a whopping 30% ?
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