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Using Java 8 to convert a list of objects into a string obtained from the toString() method
...lt;Integer> list = new ArrayList<>();
list.add(1);
list.add(2);
list.add(3);
StringBuilder b = new StringBuilder();
list.forEach(b::append);
System.out.println(b);
you can also try:
String s = list.stream().map(e -> e.toString()).reduce("", String::concat);
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edited Nov 24 '14 at 0:57
answered Mar 5 '14 at 10:35
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Autocompletion in Vim
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answered Feb 8 '13 at 2:34
ValloricValloric
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alex
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answered Oct 15 '10 at 7:30
Jacob Relki...
How do I combine two data frames?
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I believe you can use the append method
bigdata = data1.append(data2, ignore_index=True)
to keep their indexes just dont use the ignore_index keyword ...
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scopes with lambda and arguments in Rails 4 style?
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edited May 15 '19 at 20:37
Arslan Ali
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answe...
Difference between List, List, List, List, and List
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1) Correct
2) You can think of that one as "read only" list, where you don't care about the type of the items.Could e.g. be used by a method that is returning the length of the list.
3) T, E and U are the same, but people tend to use ...
Which Boost features overlap with C++11?
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How to split a dos path into its components in Python
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edited Apr 22 '15 at 16:34
HunnyBear
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answered Jul 2 '10...
How to find and return a duplicate value in array
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