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Valid to use (anchor tag) without href attribute?
...f this is that an <a> element without [href] won't be in the tabbing order by default.
The real question is whether the <a> element alone is an appropriate representation of a <button>. On a semantic level, there is a distinct difference between a link and a button.
A button is s...
try {} without catch {} possible in JavaScript?
...
this answer is the most up to date! in terms of execution order, 1. it attempts the try block. 2. Catches the error. 3. Executes the finally block. 4. Throws the error. Is this correct?
– helsont
Jun 20 '19 at 17:16
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Loop through an array in JavaScript
...ject properties.
It shouldn't be used for array-like objects because:
The order of iteration is not guaranteed; the array indexes may not be visited in numeric order.
Inherited properties are also enumerated.
The second point is that it can give you a lot of problems, for example, if you extend th...
Does the Java &= operator apply & or &&?
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In order to avoid redundancies (still allowing for short-circuiting), you can simply write a=a&&b().
– Unai Vivi
Sep 8 '12 at 9:39
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Is there a standardized method to swap two variables in Python?
... side.
http://docs.python.org/3/reference/expressions.html#evaluation-order
That means the following for the expression a,b = b,a :
the right-hand side b,a is evaluated, that is to say a tuple of two elements is created in the memory. The two element are the objects designated by the ide...
Can I run multiple programs in a Docker container?
... for each process such as autorestart=true, stdout_logfile, stderr_logfile etc. Take a look at docs.docker.com/engine/admin/using_supervisord
– Andreas Lundgren
Aug 12 '16 at 7:39
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What is the difference between UNION and UNION ALL?
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UNION removes duplicates, whereas UNION ALL does not.
In order to remove duplicates the result set must be sorted, and this may have an impact on the performance of the UNION, depending on the volume of data being sorted, and the settings of various RDBMS parameters ( For Oracle PG...
How to initialize log4j properly?
...sed to initialize itself, which loggers / appenders got configured and how etc.
The configuration file can be a java properties file or an xml file. Here is a sample of the properties file format taken from the log4j intro documentation page:
log4j.rootLogger=debug, stdout, R
log4j.appender.stdo...
How to parse JSON in Java
... How can I parse it to get the values of pageName , pagePic , post_id , etc.?
34 Answers
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Android - How To Override the “Back” button so it doesn't Finish() my Activity?
...zable("object_key",
someSerializableClassYouWantToPersist);
// etc. until you have everything important stored in the bundle
}
Then you use onCreate(Bundle) to get everything out of that persisted bundle and recreate your state.
@Override
onCreate(Bundle savedInstanceState) {
if(s...