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MySQL get row position in ORDER BY
... it.
SELECT t,COUNT(*) AS position FROM t
WHERE name <= 'search string' ORDER BY name
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Jump to matching XML tags in Vim
...is almost the same, but it doesn't include the outer tags.
The 'y' in the string is of course the normal mode "yank" command. (:help y)
a or i can be used for object selection after an operator such as y or inside a visual selection. The symbol after a or i specifies what should be selected. Th...
How to get whole and decimal part of a number?
... not going to end up being represented in scientific notation when cast to string. If it's a really really huge or really really tiny number then this won't be the case and this method will break.
– GordonM
Oct 4 '15 at 9:37
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Rails hidden field undefined method 'merge' error
...
You should do:
<%= f.hidden_field :service, :value => "test" %>
hidden_field expects a hash as a second argument
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Appending a vector to a vector [duplicate]
...dd vector to itself both popular solutions will fail:
std::vector<std::string> v, orig;
orig.push_back("first");
orig.push_back("second");
// BAD:
v = orig;
v.insert(v.end(), v.begin(), v.end());
// Now v contains: { "first", "second", "", "" }
// BAD:
v = orig;
std::copy(v.begin(), v.end(...
Why does Python code run faster in a function?
...e names are assigned to indexes. This is possible because you can't dynamically add local variables to a function. Then retrieving a local variable is literally a pointer lookup into the list and a refcount increase on the PyObject which is trivial.
Contrast this to a global lookup (LOAD_GLOBAL), w...
Get statistics for each group (such as count, mean, etc) using pandas GroupBy?
... a MultiIndexed columned dataframe).
You also get different statistics for string data. Here's an example,
df2 = df.assign(D=list('aaabbccc')).sample(n=100, replace=True)
with pd.option_context('precision', 2):
display(df2.groupby(['A', 'B'])
.describe(include='all')
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Calling a method every x minutes
...nds so 5*60 seconds = 300 seconds = 300000 milliseconds.
static void Main(string[] args)
{
System.Timers.Timer timer = new System.Timers.Timer();
timer.Interval = 300000;
timer.Elapsed += timer_Elapsed;
timer.Start();
}
Then call GetData() in the timer_Elapsed event like this:
st...
Is there a better way to find out if a local git branch exists?
... or nothing if it doesn't.
Assign it to a variable and check for an empty string.
exists=`git show-ref refs/heads/<branch-name>`
if [ -n "$exists" ]; then
echo 'branch exists!'
fi
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Generating CSV file for Excel, how to have a newline inside a value
...w has EFBBBF header, uses 0A as row separator, and 0D0A as new line inside strings in text cells.
– quetzalcoatl
Jan 7 '15 at 12:01
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