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Filter rows which contain a certain string
...lready posted by the @latemail in the comments above. You can use regular em>x m>pressions for the second and subsequent arguments of filter like this:
dplyr::filter(df, !grepl("RTB",TrackingPim>x m>el))
Since you have not provided the original data, I will add a toy em>x m>ample using the mtcars data set. Imag...
Is there a function to make a copy of a PHP array to another?
...confused by intricacies such as ArrayObject, which is an object that acts em>x m>actly like an array. Being an object however, it has reference semantics.
Edit: @AndrewLarsson raises a point in the comments below. PHP has a special feature called "references". They are somewhat similar to pointers in la...
String.IsNullOrWhiteSpace in LINQ Em>x m>pression
...;-- this won't work as intended (crazy I know ...)
– m>X m>DS
Dec 14 '18 at 13:59
...
Object of custom type as dictionary key
..._(self, other):
# Not strictly necessary, but to avoid having both m>x m>==y and m>x m>!=y
# True at the same time
return not(self == other)
The Python dict documentation defines these requirements on key objects, i.e. they must be hashable.
...
How to find the largest file in a directory and its subdirectories?
We're just starting a UNIm>X m> class and are learning a variety of Bash commands. Our assignment involves performing various commands on a directory that has a number of folders under it as well.
...
How to merge 2 JSON objects from 2 files using jq?
...e * operator. When given two objects, it will merge them recursively. For em>x m>ample,
jq -s '.[0] * .[1]' file1 file2
Important: Note the -s (--slurp) flag, which puts files in the same array.
Would get you:
{
"value1": 200,
"timestamp": 1382461861,
"value": {
"aaa": {
"value1": "v...
generate days from date range
...bles. The subquery generates dates for the last 10,000 days, and could be em>x m>tended to go as far back or forward as you wish.
select a.Date
from (
select curdate() - INTERVAL (a.a + (10 * b.a) + (100 * c.a) + (1000 * d.a) ) DAY as Date
from (select 0 as a union all select 1 union all select...
Convert character to ASCII code in JavaScript
... unlike String.fromCharCode( asciiNumVal ), stringInstance.charCodeAt( indem>x m> ) is not a static method of class String
– bobobobo
Sep 12 '12 at 19:09
...
Using Pairs or 2-tuples in Java [duplicate]
...but a custom one might be as easy as the following:
public class Tuple<m>X m>, Y> {
public final m>X m> m>x m>;
public final Y y;
public Tuple(m>X m> m>x m>, Y y) {
this.m>x m> = m>x m>;
this.y = y;
}
}
Of course, there are some important implications of how to design this class further regarding equa...
What are rvalues, lvalues, m>x m>values, glvalues, and prvalues?
In C++03, an em>x m>pression is either an rvalue or an lvalue .
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