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0.1 float is greater than 0.1 double. I expected it to be false [duplicate]
... say the answer depends on the rounding mode when converting the double to float. float has 24 binary bits of precision, and double has 53. In binary, 0.1 is:
0.1₁₀ = 0.0001100110011001100110011001100110011001100110011…₂
^ ^ ^ ^
1 10 ...
How can I validate a string to only allow alphanumeric characters in it?
... I think this answer is just plain wrong, assuming alphanumeric set is A-Z,a-z and 0-9 because this covers the whole range of Unicode letters and digits, which including non-Latin characters as well. For example, char.IsLetterOrDigit('ก') will return true. csharppad.com/gist/f96a6062f9f...
How can I get the external SD card path for Android 4.0+?
...
I have a variation on a solution I found here
public static HashSet<String> getExternalMounts() {
final HashSet<String> out = new HashSet<String>();
String reg = "(?i).*vold.*(vfat|ntfs|exfat|fat32|ext3|ext4).*rw.*";
String s = "";
try {
final Pro...
Java Equivalent of C# async/await?
... that's the only way to learn. It is possible to use it without java agent settings in production; that should lower the bar a little (github.com/electronicarts/ea-async).
– thoredge
May 23 '18 at 7:49
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What does the unary plus operator do?
What does the unary plus operator do? There are several definitions that I have found ( here and here ) but I still have no idea what it would be used for. It seems like it doesn't do anything but there has be a reason for it, right?
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Really Cheap Command-Line Option Parsing in Ruby
... is that you'll get a warning (if you've enabled them) when accessing an unset global variable, but it's still falsey, so it works just fine for throwaway tools and quick scripts.
One caveat pointed out by FelipeC in the comments in "How to do really cheap command-line option parsing in Ruby", is t...
Get final URL after curl is redirected
I need to get the final URL after a page redirect preferably with curl or wget.
10 Answers
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Multiple line code example in Javadoc comment
...ties issues (in particular with Generics), e.g.:
* <pre>
* {@code
* Set<String> s;
* System.out.println(s);
* }
* </pre>
Will give correct HTML output:
Set<String> s;
System.out.println(s);
While omitting the @code block (or using a <code> tag) will result in HTML...
How to manually expand a special variable (ex: ~ tilde) in bash
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Due to the nature of StackOverflow, I can't just make this answer unaccepted, but in the intervening 5 years since I posted this there have been far better answers than my admittedly rudimentary and pretty bad answer (I was young, don't kill me...
How can you use an object's property in a double-quoted string?
...ons of the elements (by default; a different separator can be specified by setting $OFS) E.g., "array: $(@(1, 2, 3))" yields array: 1 2 3
Instances of any other type (including elements of collections that aren't themselves collections) are stringified by either calling the IFormattable.ToString() m...