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How do I find out if first character of a string is a number?
... && c <= '9');
Or the slower regex solutions:
s.substring(0, 1).matches("\\d")
// or the equivalent
s.substring(0, 1).matches("[0-9]")
However, with any of these methods, you must first be sure that the string isn't empty. If it is, charAt(0) and substring(0, 1) will throw a StringIn...
C# Thread safe fast(est) counter
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answered Nov 1 '12 at 16:50
Austin SalonenAustin Salonen
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Convert a char to upper case using regular expressions (EditPad Pro)
...xample:
test this sentence
Find what: \([^ ]*\) \(.*\)
Replace with: \U\1\E \2
the \U will cause all following chars to be upper
the \E will turn off the \U
the result will be:
TEST this sentence
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How to add pandas data to an existing csv file?
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edited Nov 1 '17 at 17:10
root
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an...
How to set the style -webkit-transform dynamically using JavaScript?
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201
The JavaScript style names are WebkitTransformOrigin and WebkitTransform
element.style.webkitTr...
How to extract text from a string using sed?
...ing line), use a substitution.
sed -n 's/.*\([0-9][0-9]*G[0-9][0-9]*\).*/\1/p'
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How to write multiple line string using Bash with variables?
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kernel="2.6.39"
distro="xyz"
cat >/etc/myconfig.conf <<EOL
line 1, ${kernel}
line 2,
line 3, ${distro}
line 4 line
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EOL
cat /etc/myconfig.conf
This construction is referred to as a Here Document and can be found in the Bash man pages under man --pager='less -p "\s*Here Documents"'...
Fade In Fade Out Android Animation in Java
I want to have a 2 second animation of an ImageView that spends 1000ms fading in and then 1000ms fading out.
11 Answers
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