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SQL WHERE ID IN (id1, id2, …, idn)
...tion 2 does the same but you repeat the column name lots of times; additionally the SQL engine doesn't immediately know that you want to check if the value is one of the values in a fixed list. However, a good SQL engine could optimize it to have equal performance like with IN. There's still the rea...
On a CSS hover event, can I change another div's styling? [duplicate]
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That's using the general sibling combinator (~).
Both + and ~ work in all modern browsers and IE7+
If #b is a descendant of #a, you can simply use #a:hover #b.
ALTERNATIVE: You can use pure CSS to do this by positioning the second element before the first. The first div is first in markup, bu...
How do I change the UUID of a virtual disk?
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I really wish VirtualBox will have some UI or a window that allow us to change this
– fedmich
Feb 11 '15 at 15:49
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How to suppress GCC warnings from library headers?
...ncludes (i.e. #include ) or includes from certain paths? I'd like to use -Wall and/or -Wextra as usual on project code without relevant info being obscured. I currently use grep on make output but I'd like something better.
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Hard reset of a single file
...py of my-file.txt and its state in the index with that from HEAD.
-- basically means: treat every argument after this point as a file name. More details in this answer. Thanks to VonC for pointing this out.
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Get yesterday's date in bash on Linux, DST-safe
I have a shell script that runs on Linux and uses this call to get yesterday's date in YYYY-MM-DD format:
10 Answers
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avoid page break inside row of table
...at you pointed out above - they have a unique display style, which doesn't allow for these CSS rules. However, the <td> and <th> tags within them usually do allow this kind of specification - and you can easily apply such rules to ALL child-<tr>'s and <td>'s using CSS as show...
count the frequency that a value occurs in a dataframe column
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If you want to apply to all columns you can use:
df.apply(pd.value_counts)
This will apply a column based aggregation function (in this case value_counts) to each of the columns.
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Align DIV's to bottom or baseline
... I doubt this does what he wants, currently this will position all (looks as though there will be multiple child elements if its a dynamic bar chart) on top of each other.
– crmepham
Dec 14 '13 at 6:55
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How to get file_get_contents() to work with HTTPS?
...following code worked fine when I was using the test server (which wasn't calling an SSL URL), but now when I am testing it on the working server with HTTPS, it's failing with the error message "failed to open stream".
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