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Prepend a level to a pandas MultiIndex
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It took me a while to realize that if you have more than one key for FirstLevel as in ['Foo', 'Bar'] the first argument will also need to have the corresponding length, i.e., [df] * len(['Foo', 'Bar'])!
– mrclng
Dec 13 '1...
Get domain name from given url
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If you want to parse a URL, use java.net.URI. java.net.URL has a bunch of problems -- its equals method does a DNS lookup which means code using it can be vulnerable to denial of service attacks when used with untrusted inpu...
Find the day of a week
...dnesday", "Thursday", "Friday", "Saturday"))[weekdays(as.Date(df$date))]. If you don't like the names, you could wrap unname() around it.
– GSee
Jun 4 '14 at 22:21
6
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How to implement a many-to-many relationship in PostgreSQL?
...as text or varchar.
Don't use names of basic data types like date as identifiers. While this is possible, it is bad style and leads to confusing errors and error messages. Use legal, lower case, unquoted identifiers. Never use reserved words and avoid double-quoted mixed case identifiers if you can...
Random alpha-numeric string in JavaScript? [duplicate]
...ercase, and numbers) string in JavaScript to use as a probably-unique identifier?
17 Answers
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Flexbox not giving equal width to elements
... that is flex-basis. By default flex-basis is auto.
From the spec:
If the specified flex-basis is auto, the used flex basis is the value of the flex item’s main size property. (This can itself be the keyword auto, which sizes the flex item based on its contents.)
Each flex item has a fl...
jQuery how to find an element based on a data-attribute value?
... 16 '10 at 6:30
Frédéric HamidiFrédéric Hamidi
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What are the file limits in Git (number and size)?
... Git
fundamentally never really looks at less than the whole repo. Even if you
limit things a bit (ie check out just a portion, or have the history go
back just a bit), git ends up still always caring about the whole thing,
and carrying the knowledge around.
So git scales really badly ...
How to apply bindValue method in LIMIT clause?
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would be cool if someone provided the explanation why this is so...from a design/security (or other) standpoint.
– Ross
Sep 25 '12 at 0:23
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Logging Clientside JavaScript Errors on Server [closed]
...to tell the server what went wrong, however since it's not part of any specification, support is somewhat flaky.
Here's an example from Using XMLHttpRequest to log JavaScript errors:
window.onerror = function(msg, url, line)
{
var req = new XMLHttpRequest();
var params = "msg=" + encodeURIComp...