public RubyValue replace(int start, int length, RubyValue value) {
int index = getRealIndex(start);
if (value == RubyConstant.QNIL) {
for (int i = 0; i < length; i++) {
array_.remove(index);
}
return value;
}
if (length < 0) {
throw new RubyException(RubyRuntime.IndexErrorClass, "negative length (" + length + ")");
} else if (0 == length) {
if (value instanceof RubyArray) {
array_.addAll(index, ((RubyArray) value).array_);
} else {
array_.add(index, value);
}
} else {
for (int i = 0; i < length - 1; ++i) {
array_.remove(index);
}
if (value instanceof RubyArray) {
array_.remove(index);
array_.addAll(index, ((RubyArray) value).array_);
} else {
array_.set(index, value);
}
}
return value;
}
private RubyArray insert(int index, RubyArray a) {
for (int i = array_.size(); i < index; ++i) {
array_.add(RubyConstant.QNIL);
}
array_.addAll(index, a.array_);
return this;
}
public RubyArray expand(RubyValue v) {
if (v instanceof RubyArray) {
// [5,6,*[1, 2]]
array_.addAll(((RubyArray) v).array_);
} else {
// [5,6,*1], [5,6,*nil]
array_.add(v);
}
return this;
}
// @RubyLevelMethod(name="unshift")
public RubyArray unshift(RubyArray value) {
array_.addAll(0, value.array_);
return this;
}
// @RubyLevelMethod(name="concat")
public RubyArray concat(RubyValue v) {
RubyArray ary = v.toAry();
array_.addAll(ary.array_);
return this;
}