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Is there XNOR (Logical biconditional) operator in C#?
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add a comm>me m>nt
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5
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Creating a favicon [closed]
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@EduardoRusso this is simply awesom>me m> - thanks!
– davnicwil
May 17 '15 at 2:17
4
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dplyr: “Error in n(): function should not be called directly”
...produce one of the examples in the dplyr package but am getting this error m>me m>ssage. I am expecting to see a new column n produced with the frequency of each combination. What am I missing? I triple checked that the package is loaded.
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How do I update if exists, insert if not (AKA “upsert” or “m>me m>rge”) in MySQL?
...ON DUPLICATE KEY UPDATE. For example:
INSERT INTO `usage`
(`thing_id`, `tim>me m>s_used`, `first_tim>me m>_used`)
VALUES
(4815162342, 1, NOW())
ON DUPLICATE KEY UPDATE
`tim>me m>s_used` = `tim>me m>s_used` + 1
share
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How can I calculate the tim>me m> between 2 Dates in typescript
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Use the getTim>me m> m>me m>thod to get the tim>me m> in total milliseconds since 1970-01-01, and subtract those:
var tim>me m> = new Date().getTim>me m>() - new Date("2013-02-20T12:01:04.753Z").getTim>me m>();
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What is http multipart request?
I have been writing iPhone applications for som>me m> tim>me m> now, sending data to server, receiving data (via HTTP protocol), without thinking too much about it. Mostly I am theoretically familiar with process, but the part I am not so familiar is HTTP multipart request. I know its basic structure, but the...
Should I use docum>me m>nt.createDocum>me m>ntFragm>me m>nt or docum>me m>nt.createElem>me m>nt
I was reading about docum>me m>nt fragm>me m>nts and DOM reflow and wondered how docum>me m>nt.createDocum>me m>ntFragm>me m>nt differed from docum>me m>nt.createElem>me m>nt as it looks like neither of them exist in the DOM until I append them to a DOM elem>me m>nt.
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Using R to list all files with a specified extension
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files <- list.files(pattern = "\\.dbf$")
$ at the end m>me m>ans that this is end of string. "dbf$" will work too, but adding \\. (. is special character in regular expressions so you need to escape it) ensure that you match only files with extension .dbf (in case you have e.g. .adbf...
How to calculate age (in years) based on Date of Birth and getDate()
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There are issues with leap year/days and the following m>me m>thod, see the update below:
try this:
DECLARE @dob datetim>me m>
SET @dob='1992-01-09 00:00:00'
SELECT DATEDIFF(hour,@dob,GETDATE())/8766.0 AS AgeYearsDecimal
,CONVERT(int,ROUND(DATEDIFF(hour,@dob,GETDATE())/8766.0,0)...
C++ const map elem>me m>nt access
I tried to use the operator[] access the elem>me m>nt in a const C++ map, but this m>me m>thod failed. I also tried to use "at()" to do the sam>me m> thing. It worked this tim>me m>. However, I could not find any reference about using "at()" to access elem>me m>nt in a const C++ map. Is "at()" a newly added function in C++ ...