PaulYamamotoのブックマーク - はてなブックマーク

Can (a== 1 && a ==2 && a==3) ever evaluate to true?

Moderator note: Please resist the urge to edit the code or remove this notice. The pattern of whitespace may be part of the question and therefore should not be tampered with unnecessarily. If you are in the "whitespace is insignificant" camp, you should be able to accept the code as is. Is it ever possible that (a== 1 && a ==2 && a==3) could evaluate to true in JavaScript? This is an interview qu

PaulYamamoto 2018/01/17

javascript で　 (a ==1 && a== 2 && a==3)　で true を返す方法が色々紹介されていてウケる

javascript

リンク

Method references to multidimensional arrays in Java 8

PaulYamamoto 2018/01/10

// both do the same thing IntFunction<String[]> createArrayL = size -> new String[size]; IntFunction<String[]> createArrayMR = String[]::new;

リンク

How to get access to job parameters from ItemReader, in Spring Batch?

PaulYamamoto 2017/06/28

リンク

java.net.UnknownHostException on Docker

PaulYamamoto 2017/06/01

docker

リンク

How to load CSV data with enclosed by double quotes and separated by tab into HIVE table?

I am trying to load data from a csv file in which the values are enclosed by double quotes '"' and tab separated '\t' . But when I try to load that into hive its not throwing any error and data is loaded without any error but I think all the data is getting loaded into a single column and most of the values it showing as NULL. below is my create table statement. CREATE TABLE example ( organization

PaulYamamoto 2017/05/17

hive

リンク

The difference between Integer.valueOf(String) and Integer.parseInt(String)

PaulYamamoto 2014/01/06

System.out.println(Integer.valueOf("128")==Integer.valueOf("128")); -> false System.out.println(Integer.parseInt("128")==Integer.valueOf("128")); -> true

リンク

How does PHP 'foreach' actually work?

Let me prefix this by saying that I know what foreach is, does and how to use it. This question concerns how it works under the bonnet, and I don't want any answers along the lines of "this is how you loop an array with foreach". For a long time I assumed that foreach worked with the array itself. Then I found many references to the fact that it works with a copy of the array, and I have since ass