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How do you check that a number is NaN in JavaScript?
...hat is treated as unequal to itself, you can always test if a value is NaN by checking it for equality to itself:
var a = NaN;
a !== a; // true
var b = "foo";
b !== b; // false
var c = undefined;
c !== c; // false
var d = {};
d !== d; // false
var e = { valueOf: "foo" };
e !== e; // false
...
How do you know a variable type in java?
...ttribute (and you would have to retrieve class fields, get the right field by name...)
Actually for me it's totally impossible that any a.xxx().yyy() method give you the right answer since the answer would be different on the exact same object, according to the context in which you call this method...
Can I restore deleted files (undo a `git clean -fdx`)?
...
If you are using an advanced IDE like RubyMine, Eclipse etc, Chances are it would have a local history of deleted files and you might be able to recover them.
– Usman
Oct 16 '15 at 23:52
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Creating anonymous objects in php
...le! Using this simple PHP Anonymous Object class. How it works:
// define by passing in constructor
$anonim_obj = new AnObj(array(
"foo" => function() { echo "foo"; },
"bar" => function($bar) { echo $bar; }
));
$anonim_obj->foo(); // prints "foo"
$anonim_obj->bar("hello, worl...
Git stash pop- needs merge, unable to refresh index
..., then the solution will be easy. The reason have already been pointed out by the accepted answer, but it is somehow incomplete (also the solution).
The problem is, one or more files had conflict(s) previously, but Git sees them a
What's the difference between an argument and a parameter?
...ody)
ARGUMENT → ACTUAL VALUE (This means an actual value which is passed by the function calling)
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Play a Sound with Python [duplicate]
What's the easiest way to play a sound file (.wav) in Python? By easiest I mean both most platform independent and requiring the least dependencies. pygame is certainly an option, but it seems overkill for just sound.
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Escaping single quote in PHP when inserting into MySQL [duplicate]
... a backslash in the working query. This might have been done automatically by PHP via the magic_quotes_gpc setting, or maybe you did it yourself in some other part of the code (addslashes and stripslashes might be functions to look for).
See Magic Quotes
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How do I iterate through the files in a directory in Java?
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Agree with @GiliNachum. FileUtils by Apache first collects all files and gives an iterator for them. It is harmful for resources if you have a huge amount of files.
– Bogdan Samondros
Feb 18 '19 at 14:18
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How do I specify unique constraint for multiple columns in MySQL?
...row's user/email/address values, would the INSERT do the actions specified by the ON DUPLICATE KEY clause instead?
– clizzin
May 26 '11 at 2:29
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