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valueOf() vs. toString() in Javascript
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Here's a little more detail, before I get to the answer:
var x = {
toString: function () { return "foo"; },
valueOf: function () { return 42; }
};
alert(x); // foo
"x=" + x; // "x=42"
x + "=x"; // "42=x"
x + "1"; // 421
x + 1; // 4...
What does `kill -0 $pid` in a shell script do?
...en PID is running and you have the permission to send a signal to it.
For more information see the following manpages:
kill(1)
$ man 1 kill
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If sig is 0, then no signal is sent, but error checking is still performed.
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kill(2)
$ man 2 kill
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If sig is 0, then no signal is sent, but erro...
What is the difference between single and double quotes in SQL?
...lumn is actually called in the database. For example: PRODUCT.id would be more readable as product_id, so you use either of the following:
SELECT PRODUCT.id AS product_id
SELECT PRODUCT.id 'product_id'
Either works in Oracle, SQL Server, MySQL… but I know some have said that the TOAD IDE seem...
Why do you need explicitly have the “self” argument in a Python method?
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65
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Launch Bootstrap Modal on page load
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85
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How can one change the timestamp of an old commit in Git?
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803
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How to remove leading and trailing whitespace in a MySQL field?
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17
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“unpacking” a tuple to call a matching function pointer
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277
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OnChange event handler for radio button (INPUT type=“radio”) doesn't work as one value
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120
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