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Difference between map, applymap and apply methods in Pandas
Can you tell me when to use these vectorization methods with basic examples?
10 Answers
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Inspecting standard container (std::map) contents with gdb
...td::map with 2 elements = {[1] = 2, [2] = 4}
If it doesn't work automatically for you see the first bullet point on the STL Support page of the GDB wiki.
You can write Python pretty printers for your own types too, see Pretty Printing in the GDB manual.
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Python Script execute commands in Terminal
...nds
s=commands.getstatusoutput('ls')
print s
>> (0, 'file_1\nfile_2\nfile_3')
s[1].split("\n")
>> ['file_1', 'file_2', 'file_3']
share
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Location Services not working in iOS 8
... check whether the user is running iOS 8 or iOS 7. For example:
#define IS_OS_8_OR_LATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)
//In ViewDidLoad
if(IS_OS_8_OR_LATER) {
[self.locationManager requestAlwaysAuthorization];
}
[self.locationManager startUpdatingLocation];
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Bogus foreign key constraint fail
...each query (bugs.mysql.com/bug.php?id=8280), making it neccessary to write all the drop statements in one query, eg.
SET FOREIGN_KEY_CHECKS=0;
DROP TABLE my_first_table_to_drop;
DROP TABLE my_second_table_to_drop;
SET FOREIGN_KEY_CHECKS=1;
Where the SET FOREIGN_KEY_CHECKS=1 serves as an extr...
When should you use a class vs a struct in C++?
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A struct with no modifiers or methods is called a POD struct, which exists as a backwards compatible interface with C libraries as it is (supposedly) guaranteed to be laid out as though it were a C struct. Apart from this one exception though, the only difference is ...
Find a pair of elements from an array whose sum equals a given number
Given array of n integers and given a number X, find all the unique pairs of elements (a,b), whose summation is equal to X.
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PHP function to get the subdomain of a URL
...hen dealing with co.uk, for example, it does not. As seen here This is actually a harder problem to solve.
– Mike Lewis
Mar 13 '11 at 23:12
2
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How to set commands output as a variable in a batch file
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Only drawback to bottom approach (which is preferable in all other ways) is that it doesn't work with multi-line output.
– dgo
Nov 29 '16 at 15:46
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How to grey out a button?
... disabled by setting the alpha (making it semi-transparent). This is especially useful if your button background is an image, and you don't want to create states for it.
button.setAlpha(.5f);
button.setClickable(false);
update: I wrote the above solution pre Kotlin and when I was a rookie. It's m...