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Paperclip::Errors::MissingRequiredValidatorError with Rails 4
...date filename
validates_attachment_file_name :image, :matches => [/png\Z/, /jpe?g\Z/, /gif\Z/]
Option 3: Do not validate
If for some crazy reason (can be valid but I cannot think of one right now), you do not wish to add any content_type validation and allow people to spoof Content-Types and ...
Detect and exclude outliers in Pandas data frame
...taFrame(np.random.randn(100, 3))
from scipy import stats
df[(np.abs(stats.zscore(df)) < 3).all(axis=1)]
description:
For each column, first it computes the Z-score of each value in the
column, relative to the column mean and standard deviation.
Then is takes the absolute of Z-score because ...
Pad a number with leading zeros in JavaScript [duplicate]
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Not a lot of "slick" going on so far:
function pad(n, width, z) {
z = z || '0';
n = n + '';
return n.length >= width ? n : new Array(width - n.length + 1).join(z) + n;
}
When you initialize an array with a number, it creates an array with the length set to that value so that...
Python: how to print range a-z?
...m'
To do the urls, you could use something like this
[i + j for i, j in zip(list_of_urls, string.ascii_lowercase[:14])]
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Best approach to converting Boolean object to string in java
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Using git commit -a with vim
...the commit and quit vim.
As an alternate to the above, you can also press ZZ while in the normal mode, which will save the file and exit vim. This is also easier for some people as it's the same key pressed twice.
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How can I calculate the time between 2 Dates in typescript
...those:
var time = new Date().getTime() - new Date("2013-02-20T12:01:04.753Z").getTime();
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Python strptime() and timezones?
...trings in here look something like this
(where EST is an Australian time-zone):
5 Answers
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How to create a .NET DateTime from ISO 8601 format
...lution makes use of the DateTimeStyles enumeration, and it also works with Z.
DateTime d2 = DateTime.Parse("2010-08-20T15:00:00Z", null, System.Globalization.DateTimeStyles.RoundtripKind);
This prints the solution perfectly.
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String Concatenation using '+' operator
...ler does :)
So this code:
string x = "hello";
string y = "there";
string z = "chaps";
string all = x + y + z;
actually gets compiled as:
string x = "hello";
string y = "there";
string z = "chaps";
string all = string.Concat(x, y, z);
(Gah - intervening edit removed other bits accidentally.)
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