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How to manually expand a special variable (ex: ~ tilde) in bash
...urposes (but please don't use this)
If I'm not mistaken, "~" will not be expanded by a bash script in that manner because it is treated as a literal string "~". You can force expansion via eval like this.
#!/bin/bash
homedir=~
eval homedir=$homedir
echo $homedir # prints home path
Alternatively...
Overloading and overriding
...o override else you'll get a compilation error.
– Alex Stephens
May 21 '15 at 18:38
Hey, this might be old but I still...
Read a variable in bash with a default value
...
You can use parameter expansion, e.g.
read -p "Enter your name [Richard]: " name
name=${name:-Richard}
echo $name
Including the default value in the prompt between brackets is a fairly common convention
What does the :-Richard part do? From the ba...
Why is a round-trip conversion via a string not safe for a double?
Recently I have had to serialize a double into text, and then get it back. The value seems to not be equivalent:
3 Answers
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Java how to replace 2 or more spaces with single space in string and delete leading and trailing spa
...opy of the string, with leading and trailing whitespace omitted.
regular-expressions.info/Repetition
No trim() regex
It's also possible to do this with just one replaceAll, but this is much less readable than the trim() solution. Nonetheless, it's provided here just to show what regex can do:
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ReSharper warns: “Static field in generic type”
...that R# is just warning you in case you weren't aware of that.
Here's an example of that:
using System;
public class Generic<T>
{
// Of course we wouldn't normally have public fields, but...
public static int Foo;
}
public class Test
{
public static void Main()
{
Ge...
What are these ^M's that keep showing up in my files in emacs?
So I think it may have to do with textmate, but we work in a small team and are having some issues with full-file conflicts of nearly identical files in git because each line of one branch has a ^M appended to it.
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Logical operators (“and”, “or”) in DOS batch
... answered Jan 26 '10 at 23:07
paxdiablopaxdiablo
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Modifying the “Path to executable” of a windows service
...s. Many paths require quoted strings, which you can enter as follows, for example with MS SQL Server: sc config mssqlserver binPath= "\"F:\SQL DATA\MSSQL10.MSSQLSERVER\MSSQL\Binn\sqlservr.exe\" -sMSSQLSERVER"
– Marc Durdin
Nov 19 '14 at 23:30
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How do I set the proxy to be used by the JVM
Many times, a Java app needs to connect to the Internet. The most common example happens when it is reading an XML file and needs to download its schema.
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