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Why is String immutable in Java?
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We can not be sure of what was Java designers actually thinking while designing String but we can only conclude these reasons based on the advantages we get out of string immutability, Some of which are
1. Existence of String Constant Pool
As disc...
Matching a space in regex
...ow letters, number and a space
Then it is as simple as adding a space to what you've already got:
$newtag = preg_replace("/[^a-zA-Z0-9 ]/", "", $tag);
(note, I removed the s| which seemed unintentional? Certainly the s was redundant; you can restore the | if you need it)
If you specifically wa...
Change Volley timeout duration
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This is exactly what I was looking for to prevent Volley from discarding my request which takes 15 sec. - Thanx !
– slott
Nov 2 '13 at 21:56
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Change default text in input type=“file”?
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Thank you. This worked perfectly, and was exactly what I was looking for.
– Chris - Jr
Sep 23 '16 at 13:47
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How to rename a single column in a data.frame?
... I'm also quite new with R, loved this solution! I've actually checked what it does, and I think it's worth specify that [names(df) == old.var.name] actually returns a vector with true/false values. So it has the potential to change multiple column names if, for example, regular expressions are ...
PhpStorm text size
...e to define a shortcut to increase/decrease size of code in PhpStorm, like what you can do in Notepad++ with CTRL + Mouse Wheel ?
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How to convert a color integer to a hex String in Android?
...t realized there is Color.parseColor(String hex) method which does exactly what I'm asking for.
– Marcel Bro
Jan 31 '13 at 8:08
4
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Testing if object is of generic type in C#
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What if you don't have a way to know <T>? Like, it might be int, or string, but you don't know that. This generates, it would seem, false negatives... so you don't have a T to use, you're just looking through properties...
How to turn NaN from parseInt into 0 for an empty string?
... the correct default when your preferred default is ZERO (granted, this is what the OP wanted). As you have mentioned, due to the falsy nature of the '0' input, it is treated as invalid input in this case, and the statement will return the default value instead (maybe not what was expected!)
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/etc/apt/sources.list" E212: Can't open file for writing
...the file name is not valid.
Vim has a builtin help system. I just quoted what it says to :h E212.
You might want to edit the file as a superuser as sudo vim FILE. Or if you don't want to leave your existing vim session (and now have proper sudo rights), you can issue:
:w !sudo tee % > /dev/nu...