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Custom attributes - Yea or nay?
...You won't be able to remove comments without breaking your code. This also means you can't add real comments anymore.
– Olivictor
May 12 '17 at 14:25
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Read an Excel file directly from a R script
...NN, TRUE),
#lognormally distributed numeric
num1 = round(exp(rnorm(NN, mean = 6.5, sd = 1.5)), 2L),
#3 binary strings
str6 = sample(c("Y","N"), NN, TRUE),
str7 = sample(c("M","F"), NN, TRUE),
str8 = sample(c("B","W"), NN, TRUE),
#right-skewed integer
int1 = ceiling(rexp(NN)),
#date...
What is the meaning of the term arena in relation to memory?
...eavy use of the word arena , but never defines it. I've searched for the meaning of the word and how it relates to memory, and found nothing. Here are a few contexts in which the author uses the term:
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'IF' in 'SELECT' statement - choose output value based on column values
..., IFNULL(amount,0) * -1) as amount
FROM report
The part IFNULL(amount,0) means when amount is not null return amount else return 0.
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How do you post to an iframe?
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Depends what you mean by "post data". You can use the HTML target="" attribute on a <form /> tag, so it could be as simple as:
<form action="do_stuff.aspx" method="post" target="my_iframe">
<input type="submit" value="Do Stu...
Java string to date conversion
...relevance from the javadoc, listing all available format patterns:
Symbol Meaning Presentation Examples
------ -------------------------- ------------ ----------------------------------------------
G era text AD; Anno Domini; A
u ...
How to efficiently build a tree from a flat structure?
...ps if x[1] == node]
}
For example:
# (child, parent) pairs where -1 means no parent
flat_tree = [
(1, -1),
(4, 1),
(10, 4),
(11, 4),
(16, 11),
(17, 11),
(24, 17),
(25, 17),
(5, 1),
(8, 5),
(9, 5),
(7, 9),
(12, 9),
(22, ...
How do I UPDATE from a SELECT in SQL Server?
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This will tend to work across almost all DBMS which means learn once, execute everywhere. If that is more important to you than performance you might prefer this answer, especially if your update is a one off to correct some data.
– Alan Macdonald
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Make a link use POST instead of GET
...click the link it will perform a postback using JavaScript". This has more meaning than binding a click event. Hard rules like "dont ever use javascript in href" are as bad as any other bad practice.
– Menol
Oct 31 '19 at 10:47
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How to highlight text using javascript
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@julmot; To 1: Which means you need to iterate through every element, which is precisely what I do. Unless you don't care about loosing formatting, in which case you can search in document.body.innerText, which will be quite slow. 3. Not in the D...