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How to check if a string contains only digits in Java [duplicate]
...all be "true"
System.out.println("1".matches(regex));
System.out.println("12345".matches(regex));
System.out.println("123456789".matches(regex));
// negative test cases, should all be "false"
System.out.println("".matches(regex));
System.out.println("foo".matches(regex));
System.out.println("aa123b...
How to change the style of alert box?
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The alert box is a system object, and not subject to CSS. To do this style of thing you would n...
Are lists thread-safe?
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answered Jun 12 '11 at 0:00
Thomas WoutersThomas Wouters
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“The run destination iOS Device is not valid for running the scheme”
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28 Answers
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BAT file: Open new cmd window and execute a command in there
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271
You may already find your answer because it was some time ago you asked. But I tried to do som...
How do I print the full value of a long string in gdb?
...o applies to the display of strings. When GDB starts, this limit is set to 200. Setting number-of-elements to zero means that the printing is unlimited.
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Use of def, val, and var in scala
These lines of code outputs 12 , even though person.age=20 was successfully executed. I found that this happens because I used def in def person = new Person("Kumar",12) . If I use var or val the output is 20 . I understand the default is val in scala. This:
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Do sealed classes really offer performance Benefits?
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Do I encode ampersands in ?
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edited Jan 22 '14 at 21:56
answered Sep 14 '10 at 1:39
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How to pipe input to a Bash while loop and preserve variables after loop ends
... in a script makes the modfied sum available after the loop:
FILECONTENT="12 Name
13 Number
14 Information"
shopt -s lastpipe # Comment this out to see the alternative behaviour
sum=0
echo "$FILECONTENT" |
while read number name; do ((sum+=$number)); done
echo $sum
Doing this at the command line ...