tech.tablesaw.columns.strings.StringReduceUtils Maven / Gradle / Ivy
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/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package tech.tablesaw.columns.strings;
import tech.tablesaw.columns.Column;
public interface StringReduceUtils extends Column, Iterable {
/**
* Returns a single string made by appending all the strings in this column, separated by the
* given delimiter
*/
default String appendAll(String delimiter) {
StringBuilder builder = new StringBuilder();
int count = 0;
for (String next : this) {
builder.append(next);
if (count < size() - 1) {
builder.append(delimiter);
count++;
} else {
break;
}
}
return builder.toString();
}
/**
* Returns a single string made by appending all the strings in this column, separated by a single
* space character
*/
default String appendAll() {
return appendAll(" ");
}
}