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How to check whether dynamically attached event listener exists or not?
... like this:
elem.onclick = function () { console.log (1) }
You can then test if an event listener was attached to onclick by returning !!elem.onclick (or something similar).
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Generic method multiple (OR) type constraint
...ible. You can, however, define overloads for specific types:
public void test(string a, string arg);
public void test(string a, Exception arg);
If those are part of a generic class, they will be preferred over the generic version of the method.
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How do you manage databases in development, test, and production?
...d examples of how to manage database schemas and data between development, test, and production servers.
14 Answers
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When do I need to use Begin / End Blocks and the Go keyword in SQL Server?
...the next batch, execution of the script will not stop. I often use this in testing. I will start the script with begin transaction and end with rollback, doing all the testing in the middle:
begin transaction
go
... test code here ...
go
rollback transaction
That way I always return to the starti...
Use a LIKE statement on SQL Server XML Datatype
... varchar field you can easily do SELECT * FROM TABLE WHERE ColumnA LIKE '%Test%' to see if that column contains a certain string.
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Jdbctemplate query for string: EmptyResultDataAccessException: Incorrect result size: expected 1, ac
... another, the only difference is you call ResultSet.next().
public String test() {
String sql = "select ID_NMB_SRZ from codb_owner.TR_LTM_SLS_RTN "
+ " where id_str_rt = '999' and ID_NMB_SRZ = '60230009999999'";
return jdbc.query(sql, new ResultSetExtractor<String>() ...
Storing Objects in HTML5 localStorage
...ur object before storing it, and later parse it when you retrieve it:
var testObject = { 'one': 1, 'two': 2, 'three': 3 };
// Put the object into storage
localStorage.setItem('testObject', JSON.stringify(testObject));
// Retrieve the object from storage
var retrievedObject = localStorage.getItem(...
eval command in Bash and its typical uses
... Take this (contrived) example:
# activate.sh
echo 'I got activated!'
# test.py
print("export foo=bar/baz/womp")
print(". activate.sh")
$ eval $(python test.py)
bash: export: `.': not a valid identifier
bash: export: `activate.sh': not a valid identifier
$ eval "$(python test.py)"
I got activate...
Case insensitive XPath contains() possible?
...slate(., 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'),
'test'
)
]
This would work for search strings where the alphabet is known beforehand. Add any accented characters you expect to see.
If you can, mark the text that interests you with some other means, like enclosing it ...
Is the 'type' attribute necessary for tags?
...
For testing purposes it WILL work without effect, but W3C requires it to validate correctly. The HTML 5 draft doesn't call for it as a requirement, but that is still in draft form at the W3C and they aren't recommending it.
Any ...