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String concatenation in Ruby
I am looking for a more elegant way of concatenating strings in Ruby.
16 Answers
16
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How to add an object to an array
...of two arrays
var x = ['a', 'b', 'c'];
var y = ['d', 'e', 'f'];
var z = x.concat(y);
// x = ['a', 'b', 'c'] (remains unchanged)
// y = ['d', 'e', 'f'] (remains unchanged)
// z = ['a', 'b', 'c', 'd', 'e', 'f']
share
...
Prevent errors from breaking / crashing gulp watch
...coffee({
bare: true
}))
.on('error', swallowError)
.pipe(concat('application.js'))
.pipe(gulp.dest('dist/scripts'))
.pipe(rename({ suffix: '.min' }))
.pipe(uglify())
.pipe(gulp.dest('dist/scripts'))
.pipe(notify({ message: 'Scripts task complete' }));
});
With...
How to convert all tables from MyISAM into InnoDB?
...with your database name.
SET @DATABASE_NAME = 'name_of_your_db';
SELECT CONCAT('ALTER TABLE `', table_name, '` ENGINE=InnoDB;') AS sql_statements
FROM information_schema.tables AS tb
WHERE table_schema = @DATABASE_NAME
AND `ENGINE` = 'MyISAM'
AND `TABLE_TYPE` = 'BASE TABLE'
ORDER BY ...
Datetime equal or greater than today in MySQL
...ing can be used.
Solution for OP:
select * from users
where created > CONCAT(CURDATE(), ' 23:59:59')
Sample to get data for today:
select * from users
where
created >= CONCAT(CURDATE(), ' 00:00:00') AND
created <= CONCAT(CURDATE(), ' 23:59:59')
Or use BETWEEN for short
sele...
Have Grunt generate index.html for different setups
...gt;/dist/<%= pkg.version %>/<%= now %>/<%= ver %>' which concats all vars (that's my build path). On my template I'll have: <script src="http://cdn.foo.com<!-- @echo path -->/js/bulldog.min.js"></script>. Anyway, I'm happy that I was able to save you some time! :D...
Return all enumerables with yield return at once; without looping through
...ods each returning an IEnumerable<ErrorInfo>, you can use Enumerable.Concat to make your code simpler:
private static IEnumerable<ErrorInfo> GetErrors(Card card)
{
return GetMoreErrors(card).Concat(GetOtherErrors())
.Concat(GetValidationErrors())
...
How to concatenate two IEnumerable into a new IEnumerable?
...he same T ). I want a new instance of IEnumerable<T> which is the concatenation of both.
4 Answers
...
How to find gaps in sequential numbering in mysql?
...orked for me to find the gaps in a table with more than 80k rows:
SELECT
CONCAT(z.expected, IF(z.got-1>z.expected, CONCAT(' thru ',z.got-1), '')) AS missing
FROM (
SELECT
@rownum:=@rownum+1 AS expected,
IF(@rownum=YourCol, 0, @rownum:=YourCol) AS got
FROM
(SELECT @rownum:=0) AS a
JOIN...
String concatenation vs. string substitution in Python
In Python, the where and when of using string concatenation versus string substitution eludes me. As the string concatenation has seen large boosts in performance, is this (becoming more) a stylistic decision rather than a practical one?
...