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How can I detect if a selector returns null?
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I like to use presence, inspired from Ruby on Rails:
$.fn.presence = function () {
return this.length !== 0 && this;
}
Your example becomes:
alert($('#notAnElement').presence() || "No object found");
I find it superior to the proposed $.fn....
Matching an empty input box using CSS
...ibute was only available in Chrome and Firefox in 2011, and this answer is from 2010. However times have changed and this is no longer the "best" answer, so I have unmarked it as accepted.
– Sjoerd
Apr 12 '17 at 7:47
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Ruby, !! operator (a/k/a the double-bang) [duplicate]
...n negate the negation. It's useful because you can use it to get a boolean from any value. The first ! will convert the argument to a boolean, e.g. true if it's nil or false, and false otherwise. The second will negate that again so that you get the boolean value of the argument, false for nil or fa...
Converting BigDecimal to Integer
...o an int. This conversion is analogous to a narrowing primitive conversion from double to short as defined in the Java Language Specification: any fractional part of this BigDecimal will be discarded, and if the resulting "BigInteger" is too big to fit in an int, only the low-order 32 bits are retur...
Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
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For MAMP
ln -s /Applications/MAMP/tmp/mysql/mysql.sock /tmp/mysql.sock
From https://coderwall.com/p/w5kwzw/solved-can-t-connect-to-local-mysql-server-through-socket-tmp-mysql-sock
UPDATE:
Every time my computer restarts I have to enter this command, so I created a shortcut.
Do the following in...
For..In loops in JavaScript - key value pairs
...k if your target really has that property, rather than having inherited it from its prototype. A bit simpler would be:
for (var k in target){
if (typeof target[k] !== 'function') {
alert("Key is " + k + ", value is" + target[k]);
}
}
It just checks that k is not a method (as if t...
Set the layout weight of a TextView programmatically
... I tried this prior to asking my question. It makes the TextView disappear from the layout. But, on a positive note, I found that setting the stretch_columns property of the TableLayout to 0 causes the effect I'm looking for (TextView's on the left, CheckBoxes on the right). Thanks for the help.
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Check list of words in another string [duplicate]
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@Ockonal: and if you want to check that all words from that list are inside the string, just replace any() above with all()
– Nas Banov
Jul 17 '10 at 23:23
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Which is a better way to check if an array has more than one element?
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From the manual: Returns the number of elements in var. If var is not an array or an object with implemented Countable interface, 1 will be returned. There is one exception, if var is NULL, 0 will be returned.
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Html helper for
...ionsAttribute is available in MvcFutures (As of MVC3). You can use sources from here: Sources or it is available in .NET Framework 4.5, see MSDN documentation
– Paulius Zaliaduonis
Sep 5 '12 at 11:49
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