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Meaning of $? (dollar question mark) in shell scripts
...executed command.
For example the command true always returns a status of 0 and false always returns a status of 1:
true
echo $? # echoes 0
false
echo $? # echoes 1
From the manual: (acessible by calling man bash in your shell)
$? Expands to the exit status of the most recen...
inserting characters at the start and end of a string
...
answered Apr 8 '12 at 0:47
Mark ByersMark Byers
683k155155 gold badges14681468 silver badges13881388 bronze badges
...
Determine installed PowerShell version
...
+50
Use $PSVersionTable.PSVersion to determine the engine version. If the variable does not exist, it is safe to assume the engine is vers...
How to capitalize the first character of each word in a string
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740
WordUtils.capitalize(str) (from apache commons-text)
(Note: if you need "fOO BAr" to become "Fo...
How to determine if a number is a prime with regex?
...lly, is there zero or one character-- or, per what I mentioned above, n == 0 || n == 1. If we have the match, then return the negation of that. This corresponds with the fact that zero and one are NOT prime.
(..+?)\\1+
The second part of the regex is a little trickier, relying on groups and backr...
How can I add a box-shadow on one side of an element?
...the box-shadow rule:
.myDiv
{
border: 1px solid #333;
width: 100px;
height: 100px;
box-shadow: 10px 0 5px -2px #888;
}
<div class="myDiv"></div>
The fourth property there -2px is the shadow spread, you can use it to change the spread of the shadow, making it a...
Is \d not supported by grep's basic expressions?
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rogerdpack
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answered Aug 1 '11 at 16:08
DaenythDaenyth
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Java Round up Any Number
... correct function to call. I'm guessing a is an int, which would make a / 100 perform integer arithmetic. Try Math.ceil(a / 100.0) instead.
int a = 142;
System.out.println(a / 100);
System.out.println(Math.ceil(a / 100));
System.out.println(a / 100.0);
System.out.println(Math.ceil(a / 100.0));
Syst...
How to round float numbers in javascript?
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davindavin
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24
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How do I set a cookie on HttpClient's HttpRequestMessage
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Todd Menier
30.2k1414 gold badges124124 silver badges146146 bronze badges
answered Sep 11 '12 at 16:57
Darin Dimit...