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Reverse / invert a dictionary mapping
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Fun Fact: Dictionaries will be ordered (by time of insertion) in Python 3.7 onwards.
– byxor
Jun 12 '18 at 20:18
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Is memcached a dinosaur in comparison to Redis? [closed]
...hout help from the client. Also memcached is faster with big values in the order of 100k. Redis recently improved a lot about big values (unstable branch) but still memcached is faster in this use case. The point here is: nor one or the other will likely going to be your bottleneck for the query-per...
“Find next” in Vim
...ll often find yourself using :noh. This is so common that a mapping is in order:
nmap <leader>z :noh<CR>
I easily remember this one as z since I used to constantly type /zz<CR> (which is a fast-to-type uncommon occurrence) to clear my highlighting. But the :noh mapping is way be...
Which mime type should I use for mp3
...g to decide which mime type to choose for returning mp3 data (served up by php)
5 Answers
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GSON throwing “Expected BEGIN_OBJECT but was BEGIN_ARRAY”?
...anguage":null,
"title":"JOHN",
"url":"http://rus.JOHN.JOHN/rss.php",
"icon_url":null,
"logo_url":null,
"id":"4f4791da203d0c2d76000035",
"modified":"2012-03-02 23:28:58.840076"
},
{
"updated_at":"2012-03-02 14:07:44",
"fetched_at":"2012-03-02 21:2...
Elegant ways to support equivalence (“equality”) in Python classes
...ses, it always calls the method of the subclass operand, regardless of the order of the operands.
So here, if Number is a classic-style class:
n1 == n3 calls n1.__eq__;
n3 == n1 calls n3.__eq__;
n1 != n3 calls n1.__ne__;
n3 != n1 calls n3.__ne__.
And if Number is a new-style class:
both n1 =...
What is the difference between onBlur and onChange attribute in HTML?
...hat field's value changes. These events will not always occur in the same order, however.
In Firefox, tabbing out of a changed field will fire onchange then onblur, and it will normally do the same in IE. However, if you press the enter key instead of tab, in Firefox it will fire onblur then onch...
Set Additional Data to highcharts series
...9, 2],
[1515059838080, 3],
// you get the idea
]
}]
In order not to lose the benefits of the turbo threshold (which is important when dealing with lots of data points), I store the data outside of the chart and look up the data point in the tooltip formatter function. Here's an e...
Why does the C preprocessor interpret the word “linux” as the constant “1”?
...IT__ 8
#define __UINT8_MAX__ 255
#define __WINT_MAX__ 2147483647
#define __ORDER_LITTLE_ENDIAN__ 1234
#define __SIZE_MAX__ 18446744073709551615UL
#define __WCHAR_MAX__ 2147483647
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 1
#define __GCC_HAVE_SYNC_COMPARE...
Is it secure to store passwords as environment variables (rather than as plain text) in config files
...level, I tend to think about levels for security in the following ways (in order of increasing strength) :
No security. Plain text. Anyone that knows where to look, can access the data.
Security by Obfuscation. You store the data (plaintext) someplace tricky, like an environment variable, or in...