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Get a random item from a JavaScript array [duplicate]
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Elegant solution. I tested it: var items = ["a","e","i","o","u"] var objResults = {} for(var i = 0; i < 1000000; i++){ var randomElement = items[Math.floor(Math.random()*items.length)] if (objResults[ra...
How to find encoding of a file via script on Linux?
...this won't work: file -b --mime-encoding Usage: file [-bchikLNnprsvz0] [-e test] [-f namefile] [-F separator] [-m magicfiles] [-M magicfiles] file... file -C -m magicfiles Try `file --help' for more information.
– Wolfgang Fahl
Apr 19 '18 at 5:07
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Can I multiply strings in Java to repeat sequences? [duplicate]
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StringUtils has been performance tuned and tested. The time to produce a production quality String utility library is time you don't have unless your current project is to write a production quality String utility library. Don't write code you don't have to. Plus, the...
Finding the direction of scrolling in a UIScrollView?
... @JasonZhao Heh -- I was getting some strange results when I was testing the code intially because I didn't take into account that the scrollview bounce causes scroll direction to..er..bounce. So, I added that to the enum when I found unexpected results.
– memmons
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Why doesn't this code simply print letters A to Z?
... the variable as a character. The for-loop would be more efficient if the test for the maximum value is determined only once as follows: "for ($i = ord('a'),$max = ord('z'); $i <= $max; $i++){"
– slevy1
Dec 1 '14 at 0:15
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Get data from file input in JQuery
...readAsDataURL(file); this is function reading Base64 datas, but i haven't tested it yet.
– Sark
Sep 6 '12 at 11:22
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How to check if a file exists in Go?
... See err for details.
// Therefore, do *NOT* use !os.IsNotExist(err) to test for file existence
}
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Get list from pandas DataFrame column headers
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Did some quick tests, and perhaps unsurprisingly the built-in version using dataframe.columns.values.tolist() is the fastest:
In [1]: %timeit [column for column in df]
1000 loops, best of 3: 81.6 µs per loop
In [2]: %timeit df.columns.va...
How to verify an XPath expression in Chrome Developers tool or Firefox's Firebug?
...ug is obsolete and has been merged into Developer Tools. Currently you can test xpath expression in Console, e.g. $("//div")
– derloopkat
Oct 22 '17 at 20:42
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How to get past the login page with Wget?
...re is an example of piping the cookie output into the next request. I only tested the following on Gentoo, but it should work in most *nix environments:
wget -q -O /dev/null --save-cookies /dev/stdout --post-data 'u=user&p=pass' 'http://example.com/login' | wget -q -O - --load-cookies /dev/stdi...