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Objective-C: difference between id and void *
...tructures, this can be a critical difference. Declaring iVars like void *_superPrivateDoNotTouch; will cause premature reaping of objects if _superPrivateDoNotTouch is actually an object. Don't do that.
attempting to invoke a method on a reference of void * type will barf up a compiler warning.
a...
Collect successive pairs from a stream
...
Now you can limit your stream to the length you want
pairStream.limit(1_000_000).forEach(i -> System.out.println(i));
P.S. I hope there is better solution, something like clojure (partition 2 1 stream)
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sqlalchemy IS NOT NULL select
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column_obj != None will produce a IS NOT NULL constraint:
In a column context, produces the clause a != b. If the target is None, produces a IS NOT NULL.
or use isnot() (new in 0.7.9):
Implement the IS NOT operator.
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Check if a string is a date value
... internally provided format:
moment("2015-06-22T13:17:21+0000", moment.ISO_8601, true).isValid(); // true
And you can use multiple formats as an array:
var formats = [
moment.ISO_8601,
"MM/DD/YYYY :) HH*mm*ss"
];
moment("2015-06-22T13:17:21+0000", formats, true).isValid(); // true
mome...
How to define @Value as optional
...swered Jan 8 '18 at 13:23
alonso_50alonso_50
9941010 silver badges1515 bronze badges
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Duplicate headers received from server
...invalidChars);
string replace = Regex.Replace(name, invalidReStr, "_").Replace(";", "").Replace(",", "");
return replace;
}
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How do you set a default value for a MySQL Datetime column?
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mysql> create table test (str varchar(32), ts TIMESTAMP DEFAULT CURRENT_TIMESTAMP);
Query OK, 0 rows affected (0.00 sec)
mysql> desc test;
+-------+-------------+------+-----+-------------------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+...
How to read environment variables in Scala
...t in Play2 and Akka) then you can use
foo = "default value"
foo = ${?VAR_NAME}
syntax to override foo if an environment variable VAR_NAME exist.
More details in https://github.com/typesafehub/config#optional-system-or-env-variable-overrides
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How to get orientation-dependent height and width of the screen?
...:
#define IsIOS8 (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_7_1)
-(CGRect)currentScreenBoundsDependOnOrientation
{
CGRect screenBounds = [UIScreen mainScreen].bounds ;
if(IsIOS8){
return screenBounds ;
}
CGFloat width = CGRectGetWidth(screenBounds) ;
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Using “like” wildcard in prepared statement
...otes = notes
.replace("!", "!!")
.replace("%", "!%")
.replace("_", "!_")
.replace("[", "![");
PreparedStatement pstmt = con.prepareStatement(
"SELECT * FROM analysis WHERE notes LIKE ? ESCAPE '!'");
pstmt.setString(1, notes + "%");
or a suffix-match:
pstmt.setString(1, "%"...