I suggest you to use the dplyr package. You can try the following code: if df is your dataframe: library(dplyr) summarised_df <- group_by(df, Ticker) %>% summarise( max(tradeDate), sum(SharesBought), max(HighestPxPaid), min(LowestPxPaid) ) 3 solved How to summarise a dataframe in R with different function for different column?
You can insert many values into SQL with a single command (though not recommend, use PDO), such as INSERT INTO MyTable ( Column1, Column2 ) VALUES ( Value1, Value2 ), ( Value1, Value2 ) If using jQuery, you can use $.post() to send data to your web server (PHP). Here’s an example: var items = … Read more
Try this; >>> $string = ‘ABCCDF[GH]IJJ[KLM]’; => “ABCCDF[GH]IJJ[KLM]” >>> preg_match_all(‘/\[(\w+)\]/’, $string, $matches); => 2 $matches will look like below. [ [ “[GH]”, “[KLM]”, ], [ “GH”, “KLM”, ], ] 2 solved How to I can split match letter in string PHP
Use squaring = element * element against squaring = list[element] * list[element] because for the first element, for example, you’re consulting list[-9] and that index is out. 0 solved Given a sorted list of integers, square the elements and give the output in sorted order
The first output shows a comma because without it, 1 being the only element, (1) would be just a integer (parentheses are wrapping the expression 1), (1,) is shown to differentiate tuples and simple parentheses. in the second one, no trailing comma is needed to differentiate tuples, since there are more than one element. In … Read more
You can use zip to process two lists in parallel. Zip will stop iteration at the shorter of the two lists. mashemup = [x.split()[0] + ‘ ‘ + y.split()[1] for x, y in zip(meeps, peeps)] print(mashempup) [‘Foghorn Cleese’, ‘Elmer Palin’, ‘Road Gilliam’, ‘Bugs Jones’, ‘Daffy Chapman’, ‘Tasmanian Idle’] Or if you need a list of … Read more
static means the value is accessed via self::$var instead of $this->var, is not instance-specific (i.e. it’s also available in static methods) and thus ideal for singletons and similar patterns a public var is accessible from everywhere, i.e. both from inside the class and outside a protected var is only accessible from inside the class and … Read more
Try: lst = [1, 2, 3, 4, 5, 6, 7] out = [sum(vv < v for vv in lst[:i]) for i, v in enumerate(lst)] print(out) Prints: [0, 1, 2, 3, 4, 5, 6] 4 solved How to find the count of numbers that are less than each element of a list [closed]
The mergesort function you call doesn’t modify its argument. Rather, it returns a new sorted list. A simple fix would be: def mergesort(data): if len(data) < 2: return data # Fix1 left = data[:len(data)//2] print(left) right = data[len(data)//2:] print(right) print(“left only now”) left = mergesort(left) # Fix2 print(“right now”) right = mergesort(right) # Fix3 return … Read more
If you just want the max score per student you can aggregate the rows before joining: select s.id_student, u.name, u.role, s.status, u.no_phone, s.exam_status, sc.score from student s join user u on u.username = s.id_student join ( select Max(score) as score, id_student from score group id_student )sc on sc.id_student = s.id_student where mod(s.id_student, 2) = 0 … Read more
Thanks to comment of cheffe where he links to another question/answer, I’ve came to the following solution: @Autowired GenericApplicationContext context; private void loadBeans(String beansXml) { XmlBeanDefinitionReader xmlReader = new XmlBeanDefinitionReader(context); xmlReader.setValidationMode(XmlBeanDefinitionReader.VALIDATION_XSD); xmlReader.loadBeanDefinitions(new InputSource(new StringReader(beansXml))); } The problem seems to be the creation of the new GenericApplicationContext. It looks like the beans are only in this … Read more
Firebase Database queries can only perform prefix matches, so strings starting with a specific string or starting with a range of string. It is not possible to query for strings ending with a specific value, nor those ending with a range of values. If you really want to do this within Firebase, consider also storing … Read more
What shall I do to handle dual monitor issue in my delphi application. Using api or application implement in .NET C# code solved What shall I do to handle dual monitor issue in my delphi application. Using api or application implement in .NET C# code
Okay, I got an answer with some sites. Not making any changes with my CSS stylesheet and NOT even using database. Here the following codes: <script type=”text/javascript”> if (document.getElementById) { window.onload = swap }; function swap() { var numimages=7; rndimg = new Array(“images/home.jpeg”,”images/home-bg.jpg”,”images/home_1.jpg”); x=(Math.floor(Math.random()*numimages)); randomimage=(rndimg[x]); document.getElementById(“home”).style.backgroundImage = “url(“+ randomimage +”)”; } </script> 4 solved Javascript: … Read more
i think you shall move this line of code textViewamount.setText(” “+getTotal(price)); to the end of onCreate methode Custom_Trial ct = new Custom_Trial( this,sr1, item1, data, price); listnew.setAdapter(ct); getTotal(price); textViewamount.setText(” “+getTotal(price)); 1 solved To get total price