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How to select the row with the maximum value in each group
...allest and largest value in a group because the values are available as an array. So you can first sort by pt descending and then use pt[1] or first(pt) to get the highest value: group %>% group_by(Subject) %>% arrange(desc(pt), .by_group = TRUE) %>% summarise(max_pt=first(pt), min_pt=last...
Test PHP headers with PHPUnit
...
I had to use xdebug_get_headers(), to get the array of set headers. headers_list() global function did not work in my case.
– Shalom Sam
Nov 8 '15 at 13:21
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Binding an enum to a WinForms combo box, and then setting it
...e string ToString()
{
return _caption;
}
}
Now return an array of objects with all the enums mapped to a string:
public object[] GetNumberNameRange()
{
return new object[]
{
new EntityName(Number.Zero, "Zero is chosen"),
new EntityName(Number.One, "One is c...
How to calculate number of days between two dates
... here is the signature : moment().diff(Moment|String|Number|Date|Array, String, Boolean);
– Sumit
May 17 '18 at 11:43
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Difference between fprintf, printf and sprintf?
... output stream is currently pointing.
sprintf writes formatted text to an array of char, as opposed to a stream.
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Is it possible to override JavaScript's toString() function to provide meaningful output for debuggi
...of its arguments to the console:
var puts = function(){
var strings = Array.prototype.map.call(arguments, function(obj){
return '' + obj;
});
console.log.apply(console, strings);
};
Usage:
puts(foo) //logs 'Pity the Foo'
puts(foo, [1,2,3], {a: 2}) //logs 'Pity the Foo 1,2,3...
Replace multiple characters in one replace call
...y have it take an object with old/new as key/value pairs instead of a flat array.
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Write text files without Byte Order Mark (BOM)?
...er Mark (BOM), so
using the GetPreamble method will return an empty byte array. If it is
necessary to include a UTF-8 identifier, such as a byte order mark, at
the beginning of a file, use the WriteAllText(String, String,
Encoding) method overload with UTF8 encoding.
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Accessing a Dictionary.Keys Key through a numeric index
... There's no guarantee that the last inserted key will be at the end of the array. The ordering for Keys on MSDN is unspecified, and subject to change. In my very brief test, it does seem to be in order of insertion, but you'd be better off building in proper bookkeeping like a stack--as you suggest ...
Random date in C#
...ping that nobody is going to use it as: for (int i = 0; i < 100; i++) { array[i].DateProp = RandomDayFunc()(); }
– Aidiakapi
Mar 29 '14 at 11:54
2
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