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How do I print the type of a variable in Rust?
...![1, 2, 4]); // prints "std::vec::Vec<i32>"
print_type_of(&"foo"); // prints "&str"
}
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what is the difference between ?:, ?! and ?= in regex?
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Try matching foobar against these:
/foo(?=b)(.*)/
/foo(?!b)(.*)/
The first regex will match and will return "bar" as first submatch — (?=b) matches the 'b', but does not consume it, leaving it for the following parentheses.
The seco...
Python Nose Import Error
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If you don't remove it, you'll have to change your import to import dir.foo, where dir is the name of your directory.
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How do you convert a DataTable into a generic list?
...ypeof(Int32 )); dt.Columns.Add("name",typeof(String)); dt.Columns.Add("foo",typeof(DateTime )); for(int i=0;i<=1000;i++){dt.Rows.Add(i, "foo", DateTime.Now);}
– Rahul Garg
Jul 25 '18 at 10:56
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Is there any way to post events to Google Analytics via server-side API? [closed]
... file_get_contents($sGaUrl);
}
sendAnalytics('UA-XXXXXXXX-1', 'http://foo.com', '/bar', 'Foo Bar');
Hope that helps!
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Converting strings to floats in a DataFrame
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In [10]: df = DataFrame(dict(A = Series(['1.0','1']), B = Series(['1.0','foo'])))
In [11]: df
Out[11]:
A B
0 1.0 1.0
1 1 foo
In [12]: df.dtypes
Out[12]:
A object
B object
dtype: object
In [13]: df.convert_objects(convert_numeric=True)
Out[13]:
A B
0 1 1
1 1 NaN
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Matlab: Running an m-file from command-line
...bash
matlab -nodisplay -nojvm -nosplash -nodesktop -r \
"try, run('/foo/bar/my_script.m'), catch, exit(1), end, exit(0);"
echo "matlab exit code: $?"
it prints matlab exit code: 1 if the script throws an exception, matlab exit code: 0 otherwise.
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Spring JPA @Query with LIKE
... You can just do like :username and then .setParameter("username", "%foo%");
– Matthew Daumen
May 16 '19 at 19:30
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What is array to pointer decay?
...array to something else, again it "decays into a pointer" (sic); ...
void foo(int arr[]);
Function foo expects the value of an array. But, in C, arrays have no value! So foo gets instead the address of the first element of the array.
int arr[5];
int *ip = &(arr[1]);
if (arr == ip) { /* somet...
JSON Array iteration in Android/Java
...ill make all instances of JSONArray iterable, meaning that the for (Object foo : bar) syntax will now work with it (note that foo has to be an Object, because JSONArrays do not have a declared type). All this works because the JSONArray class is backed by a simple ArrayList, which is already iterabl...