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Comparing HTTP and FTP for transferring files
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What's the advantage of a Java enum versus a class with public static final fields?
...d this 4.5 yrs ago, and at least a few people found it provided new info ¯_(ツ)_/¯
– Dave Newton
Jul 9 '17 at 17:09
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COALESCE Function in TSQL
...type, they get implicitly cast to an appropriate data-type using data-type order of precedence.)
It's like ISNULL() but for multiple parameters, rather than just two.
It's also ANSI-SQL, where-as ISNULL() isn't.
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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...
Getting the minimum of two values in SQL
...ll, the switch-case shown might return null or the value, depending on the order of the WHEN test (unless you add use of ISNULL). Craig's approach will always prefer selection of the not-null value which seems more correct to me, at least in my current use-case in the comparison of nullable dates.
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java.lang.OutOfMemoryError: Java heap space in Maven
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In order to resolve java.lang.OutOfMemoryError: Java heap space in Maven, try to configure below configuration in pom
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-p...
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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Using relative URL in CSS file, what location is it relative to?
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In order to create modular style sheets that are not dependent on the absolute location of a resource, authors may use relative URIs. Relative URIs (as defined in [RFC3986]) are resolved to full URIs using a base URI. RFC 3986, ...
Which terminal command to get just IP address and nothing else?
...ses on all network interfaces. [...] Do not make any assumptions about the order of the output". The last sentence tells you that print $1 may or may not give you the correct result.
– 0 0
Jul 22 '19 at 8:41
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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...