On 11 сент. 2014 г., at 0:47, Felix Chern <idry...@gmail.com> wrote:
> If you don’t want anything get inserted, just set your output to key only or
> value only.
> TextOutputFormat$LineRecordWriter won’t insert anything unless both values
> are set:
If I output value only, for instance, and my line contains TAB then everything
before TAB will be lost?
If I output key only, and my line contains TAB then everything after TAB will
be lost?
>
> public synchronized void write(K key, V value)
> throws IOException {
>
> boolean nullKey = key == null || key instanceof NullWritable;
> boolean nullValue = value == null || value instanceof NullWritable;
> if (nullKey && nullValue) {
> return;
> }
> if (!nullKey) {
> writeObject(key);
> }
> if (!(nullKey || nullValue)) {
> out.write(keyValueSeparator);
> }
> if (!nullValue) {
> writeObject(value);
> }
> out.write(newline);
> }
>
> On Sep 10, 2014, at 1:37 PM, Dmitry Sivachenko <trtrmi...@gmail.com> wrote:
>
>>
>> On 10 сент. 2014 г., at 22:33, Felix Chern <idry...@gmail.com> wrote:
>>
>>> Use ‘tr -s’ to stripe out tabs?
>>>
>>> $ echo -e "a\t\t\tb"
>>> a b
>>>
>>> $ echo -e "a\t\t\tb" | tr -s "\t"
>>> a b
>>>
>>
>> There can be tabs in the input, I want to keep input lines without any
>> modification.
>>
>> Actually it is rather standard task: process lines one by one without
>> inserting extra characters. There should be standard solution for it IMO.
>>
>
