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Can I set variables to undefined or pass undefined as an argument?
... returns undefined, but if the function is a constructor (invoked with the new operator) it will return the new object (the value of this inside the constructor) despite not having a return statement. console.log((function (){}())); returns undefined. console.log((new function (){}())); returns an ...
JavaScript code to stop form submission
... This prevents the use of the enter key to submit the form. Also, new HTML5 attributes such as required won't work.
– Sam
Jul 7 '13 at 1:40
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What makes Scala's operator overloading “good”, but C++'s “bad”?
...sidered by many to be A Bad Thing(tm), and a mistake not to be repeated in newer languages. Certainly, it was one feature specifically dropped when designing Java.
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Case insensitive comparison of strings in shell script
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Is this new in Bash 4? At least in Bash 3.2.51 (used in OS X 10.9) it does not work - the first echo statement results in: -bash: ${var1,,}: bad substitution
– Felix Rabe
Jun 11 '14 at 13:33
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SQLite - UPSERT *not* INSERT or REPLACE
...table: ID, NAME, ROLE
BAD: This will insert or replace all columns with new values for ID=1:
INSERT OR REPLACE INTO Employee (id, name, role)
VALUES (1, 'John Foo', 'CEO');
BAD: This will insert or replace 2 of the columns... the NAME column will be set to NULL or the default value:
INSE...
Installing Java on OS X 10.9 (Mavericks)
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The new Mavericks (10.9) showed me the "Requesting install", but nothing happened.
The solution was to manually download and install the official Java package for OS X, which is in Java for OS X 2013-005.
Update: As mentioned...
Refresh a page using JavaScript or HTML [duplicate]
... answered Mar 14 '11 at 4:49
ReidReid
15.9k55 gold badges3434 silver badges3333 bronze badges
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MySQL: Transactions vs Locking Tables
... got exclusive use, and can deduct the $20 from the balance, and write the new balance back in peace... and your account ends up with $80 as is expected. But... uhoh... You try to go update the receiver's account, and it's locked, and locked longer than the code allows, timing out your transaction.....
How do I reference a javascript object property with a hyphen in it?
...nteresting, didn't work in firefox6, I didn't know that... learn something new every day
– austinbv
Aug 19 '11 at 14:42
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Get mouse wheel events in jQuery?
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You don't need to divide by 120 it is useless waste of cpu
– venimus
Sep 30 '13 at 11:21
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