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How do I clear all options in a dropdown box?
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You can use the following to clear all the elements.
var select = document.getElementById("DropList");
var length = select.options.length;
for (i = length-1; i >= 0; i--) {
select.options[i] = null;
}
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startActivityForResult() from a Fragment and finishing child Activity, doesn't call onActivityResult
FirstActivity.Java has a FragmentA.Java which calls startActivityForResult() .
SecondActivity.Java call finish() but onActivityResult never get called which is
written in FragmentA.Java .
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How do you add an action to a button programmatically in xcode
...interface builder, but I want to add the action programmatically to save time and to avoid switching back and forth constantly. The solution is probably really simple, but I just can't seem to find any answers when I search it. Thank you!
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Checking for a null int value from a Java ResultSet
...hich case your test is completely redundant.
If you actually want to do something different if the field value is NULL, I suggest:
int iVal = 0;
ResultSet rs = magicallyAppearingStmt.executeQuery(query);
if (rs.next()) {
iVal = rs.getInt("ID_PARENT");
if (rs.wasNull()) {
// handle ...
Test for multiple cases in a switch, like an OR (||)
... you use a switch case when you need to test for a or b in the same case?
6 Answers
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how to check and set max_allowed_packet mysql variable [duplicate]
...ket. It you set the value under [mysqld_safe] (which is default settings came with the mysql installation) mode in /etc/my.cnf, it did no work. I did not dig into the problem. But after I change it to [mysqld] and restarted the mysqld, it worked.
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Order of event handler execution
...ey are executed in the order they are registered. However, this is an implementation detail, and I would not rely on this behavior staying the same in future versions, since it is not required by specifications.
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find -exec a shell function in Linux?
... with export -f, otherwise the subshell won't inherit them:
export -f dosomething
find . -exec bash -c 'dosomething "$0"' {} \;
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postgresql - sql - count of `true` values
...SELECT COALESCE(sum(CASE WHEN myCol THEN 1 ELSE 0 END),0) FROM <table name>
or, as you found out for yourself:
SELECT count(CASE WHEN myCol THEN 1 END) FROM <table name>
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How do I disable the 'Debug / Close Application' dialog on Windows Vista?
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Te documentation of ForceQueue is vague, I don't get exactly what it means.
– Zitrax
Mar 14 '11 at 15:38
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