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How to get a value from a cell of a dataframe?
... @Sophologist I agree that its ridiculous that this is required. It also does not work when you try to pass the conditionals inline; my_df.loc[my_df['Col1'] == foo]['Col2'] still returns an object of type <class 'pandas.core.series.Series'>
– user5359531
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Create timestamp variable in bash script
...Define a timestamp function
timestamp() {
date +"%T" # current time
}
# do something...
timestamp # print timestamp
# do something else...
timestamp # print another timestamp
# continue...
If you don't like the format given by the %T specifier you can combine the other time conversion specifiers...
How to execute IN() SQL queries with Spring's JDBCTemplate effectivly?
I was wondering if there is a more elegant way to do IN() queries with Spring's JDBCTemplate. Currently I do something like that:
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Formatting a number with exactly two decimals in JavaScript
..."2.40"
Note that toFixed() returns a string.
IMPORTANT: Note that toFixed does not round 90% of the time, it will return the rounded value, but for many cases, it doesn't work.
For instance:
2.005.toFixed(2) === "2.00"
UPDATE:
Nowadays, you can use the Intl.NumberFormat constructor. It's part of th...
Why can't an anonymous method be assigned to var?
...no Func<T> type that takes a ref anything.
var x2 = y=>123;
We don't know the type of the formal parameter, though we do know the return. (Or do we? Is the return int? long? short? byte?)
var x3 = (int y)=>null;
We don't know the return type, but it can't be void. The return type c...
Adding a column to a data.frame
...col"] <- a.vector
Since the method for data.frame assumes that if you don't specify if you're working with columns or rows, it will assume you mean columns.
For your example, this should work:
# make some fake data
your.df <- data.frame(no = c(1:4, 1:7, 1:5), h_freq = runif(16), h_freqsq...
How to install Android SDK Build Tools on the command line?
...
By default, the SDK Manager from the command line does not include the build tools in the list. They're in the "obsolete" category. To see all available downloads, use
android list sdk --all
And then to get one of the packages in that list from the command line, use:
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Is background-color:none valid CSS?
...ited Oct 13 '16 at 16:24
JGallardo
9,28666 gold badges7171 silver badges8080 bronze badges
answered Jan 5 '12 at 8:42
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Android- create JSON Array and JSON Object
...tudent1.put("birthday", "5/5/1993");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
JSONObject student2 = new JSONObject();
try {
student2.put("id", "2");
student2.put("name", "NAME OF STUDENT2");
student2.put("year", "4rd");
student2....
How to convert Set to Array?
...s like a nice way to create Arrays with guaranteed unique elements, but it does not expose any good way to get properties, except for generator [Set].values, which is called in an awkward way of mySet.values.next() .
...