Questions tagged [filter]
A program or routine that rejects or accepts data that meets a given criterion. An example would be a filter that removed entries less than a given limit from a set of values. Do NOT use this tag for: Signal or image processing, use [filtering]. Java servlet filters. Use [servlet-filters]. For Bloom filters, use [bloom-filter]. For CSS filters use [css-filters].
filter
2,440
questions
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Remove rows with all or some NAs (missing values) in data.frame
I'd like to remove the lines in this data frame that:
a) contain NAs across all columns. Below is my example data frame.
gene hsap mmul mmus rnor cfam
1 ENSG00000208234 0 NA NA ...
- 12k
58
votes
3
answers
51k
views
How to filter the jqGrid data NOT using the built in search/filter box
I want users to be able to filter grid data without using the intrinsic search box.
I have created two input fields for date (from and to) and now need to tell the grid to adopt this as its filter ...
- 22.8k
774
votes
31
answers
883k
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How to filter a Java Collection (based on predicate)?
I want to filter a java.util.Collection based on a predicate.
- 14.8k
448
votes
2
answers
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Why is `[` better than `subset`?
When I need to filter a data.frame, i.e., extract rows that meet certain conditions, I prefer to use the subset function:
subset(airquality, Month == 8 & Temp > 90)
Rather than the [ function:
...
- 88.7k
79
votes
10
answers
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Filter array of objects based on another array in javascript
Given an array of objects :
people = [
{id: "1", name: "abc", gender: "m", age:"15" },
{id: "2", name: "a", gender: "m", ...
- 801
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votes
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answers
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What are the best PHP input sanitizing functions? [duplicate]
I am trying to come up with a function that I can pass all my strings through to sanitize. So that the string that comes out of it will be safe for database insertion. But there are so many filtering ...
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votes
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List comprehension vs. lambda + filter
I have a list that I want to filter by an attribute of the items.
Which of the following is preferred (readability, performance, other reasons)?
xs = [x for x in xs if x.attribute == value]
xs = ...
- 19.1k
137
votes
3
answers
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How to filter array in subdocument with MongoDB [duplicate]
I have array in subdocument like this
{
"_id" : ObjectId("512e28984815cbfcb21646a7"),
"list" : [
{
"a" : 1
},
{
"a" : 2
},
{
...
- 1,473
32
votes
9
answers
103k
views
How to filter an array by a condition
I have an array like this:
array("a" => 2, "b" => 4, "c" => 2, "d" => 5, "e" => 6, "f" => 2)
Now I want to filter that array by some condition and only keep the elements where the ...
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372
votes
8
answers
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How to use filter, map, and reduce in Python 3
This is how I am accustomed to filter, map, and reduce working in Python 2:
>>> def f(x):
return x % 2 != 0 and x % 3 != 0
>>> filter(f, range(2, 25))
[5, 7, 11, 13, 17, 19, ...
- 12.6k
371
votes
8
answers
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File input 'accept' attribute - is it useful?
Implementing a file upload under html is fairly simple, but I just noticed that there is an 'accept' attribute that can be added to the <input type="file" ...> tag.
Is this attribute useful as ...
- 9,186
198
votes
6
answers
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views
How can I use optional parameters in a T-SQL stored procedure?
I am creating a stored procedure to do a search through a table. I have many different search fields, all of which are optional. Is there a way to create a stored procedure that will handle this? ...
- 7,310
141
votes
8
answers
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How can I group data with an Angular filter?
I have a list of players which belong to a group each. How can I use a filter to list the users per group?
[{name: 'Gene', team: 'team alpha'},
{name: 'George', team: 'team beta'},
{name: 'Steve', ...
- 11.4k
119
votes
8
answers
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Filtering DataGridView without changing datasource
I'm developing user control in C# Visual Studio 2010 - a kind of "quick find" textbox for filtering datagridview. It should work for 3 types of datagridview datasources: DataTable, DataBinding and ...
- 5,233
516
votes
31
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Filter object properties by key in ES6
Let's say I have an object:
{
item1: { key: 'sdfd', value:'sdfd' },
item2: { key: 'sdfd', value:'sdfd' },
item3: { key: 'sdfd', value:'sdfd' }
}
I want to create another object by filtering ...
- 8,906