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String Concatenation using '+' operator
Looking at the string class metadata, I only see the operators == and != overloaded. So how is it able to perform concatenation for the ' + ' operator?
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How do I submit disabled input in ASP.NET MVC?
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4 years doing .net asp and I never knew that disabled inputs don't get poste back... how did that pass me? Just include a Hidden field for the disabled select and its all sorted.(Even though the ID's are repeated on the form which is not allowed)
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Is there a way to ignore header lines in a UNIX sort?
...dout so you can pipe it or redirect it as if it had come from a single command.
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Is it possible to create a multi-line string variable in a Makefile
... you'll see the result that others have posted here -- the shell tries to handle the second and subsequent lines of the variable as commands themselves.
However, you can export the variable value as-is to the shell as an environment variable, and then reference it from the shell as an environment v...
Override Python's 'in' operator?
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Zoran, I agree, and I even upvoted this answer and not the other. I'm just pointing out that a truly good answer should always link to docs, if available.
– Peter Hansen
Aug 31 '12 at 21:55
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How can I horizontally align my divs?
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Alignments in CSS had been a nightmare. Luckily, a new standard is introduced by W3C in 2009: Flexible Box. There is a good tutorial about it here. Personally I find it much more logical and easier to understand than other methods.
.row {
width: 100%;
display: flex;
f...
How do I programmatically set the value of a select box element using JavaScript?
... Great answer, this is way easier than looping through the options. And it's standards compliant: dev.w3.org/html5/spec/…. If there are browser incompatibilities (of course there are :) I'd be very interested to know what they are. That's the sort of thing you usually count on ppk for, but ...
What do (lambda) function closures capture?
Recently I started playing around with Python and I came around something peculiar in the way closures work. Consider the following code:
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Assign pandas dataframe column dtypes
...you have to use the explicit conversions:
pd.to_datetime, pd.to_timedelta and pd.to_numeric
(As mentioned below, no more "magic", convert_objects has been deprecated in 0.17)
df = pd.DataFrame({'x': {0: 'a', 1: 'b'}, 'y': {0: '1', 1: '2'}, 'z': {0: '2018-05-01', 1: '2018-05-02'}})
df.dtypes
x ...
How to output messages to the Eclipse console when developing for Android
...int messages (like a flag) to the Eclipse console (or log) when developing and debugging an Android app
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