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How do you know a variable type in java?
...t more here:
How to determine the primitive type of a primitive variable?
https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html
http://docs.oracle.com/cd/E26806_01/wlp.1034/e14255/com/bea/p13n/expression/operator/Instanceof.html
...
How do you check if a certain index exists in a table?
...s syntax is available since SQL Server 2016. Documentation for IF EXISTS:
https://blogs.msdn.microsoft.com/sqlserverstorageengine/2015/11/03/drop-if-exists-new-thing-in-sql-server-2016/
In case you deal with a primery key instead, then use this:
ALTER TABLE [TableName] DROP CONSTRAINT IF EXISTS [...
FormData.append(“key”, “value”) is not working
...e it
you need to use console.log(formData.getAll('your key'));
watch the
https://developer.mozilla.org/en-US/docs/Web/API/FormData/getAll
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foll...
Bootstrap control with multiple “data-toggle”
...iting your own workaround code at this stage though.
Check it out... :-)
https://github.com/twitter/bootstrap/issues/7011
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How do I iterate through the files in a directory in Java?
...
For Java 7+, there is also https://docs.oracle.com/javase/7/docs/api/java/nio/file/DirectoryStream.html
Example taken from the Javadoc:
List<Path> listSourceFiles(Path dir) throws IOException {
List<Path> result = new ArrayList<>...
Illegal mix of collations MySQL Error
...sqld]
character-set-server=utf8
collation-server=utf8_general_ci
Source: https://dev.mysql.com/doc/refman/5.7/en/charset-applications.html
reformat in vim for a nice column layout
...
This is a great answer using vim macros: https://stackoverflow.com/a/8363786/59384 - basically, you start recording a macro, format the first column, stop recording then repeat the macro for all remaining lines.
Copy/pasted from that answer:
qa0f:w100i <Esc>...
Compiling with cython and mingw produces gcc: error: unrecognized command line option '-mno-cygwin'
...
Try this . It really works for the error
https://github.com/develersrl/gccwinbinaries
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...
How to subtract X day from a Date object in Java?
...an have
LocalDate date = someLocalDateInstance.minusDays(300);
Refer to https://stackoverflow.com/a/23885950/260990 for translation between java.util.Date <--> java.time.LocalDateTime
Date in = new Date();
LocalDateTime ldt = LocalDateTime.ofInstant(in.toInstant(), ZoneId.systemDefault());...
JavaScript variable number of arguments to function
..."c"
3: "d"
length: 4
Documentation and more examples here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/rest_parameters
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