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Removing duplicate objects with Underscore for Javascript
...way in underscore:
var x = [{i:2}, {i:2, x:42}, {i:4}, {i:3}];
_.chain(x).indexBy("i").values().value();
// > [{i:2, x:42}, {i:4}, {i:3}]
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How can I get nth element from a list?
How can I access a list by index in Haskell, analog to this C code?
6 Answers
6
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NOT IN vs NOT EXISTS
... explained here. It is all there to convert the previous single correlated index seek on Sales.SalesOrderDetail.ProductID = <correlated_product_id> to two seeks per outer row. The additional one is on WHERE Sales.SalesOrderDetail.ProductID IS NULL.
As this is under an anti semi join if that ...
Passing parameters to a Bash function
...n_name {
command...
}
or
function_name () {
command...
}
To call a function with arguments:
function_name "$arg1" "$arg2"
The function refers to passed arguments by their position (not by name), that is $1, $2, and so forth. $0 is the name of the script itself.
Example:
function_n...
Is False == 0 and True == 1 an implementation detail or is it guaranteed by the language?
...d not work with an object which is not a subclass of integer, because list indexing only works with integers, or objects that define a __index__ method (thanks mark-dickinson).
Edit:
It is true of the current python version, and of that of Python 3. The docs for python 2.6 and the docs for Python ...
Hyphen, underscore, or camelCase as word delimiter in URIs?
... URL. Why? Because the hyphen separates words (so that a search engine can index the individual words), and is not a word character. Underscore is a word character, meaning it should be considered part of a word.
Double-click this in Chrome: camelCase
Double-click this in Chrome: under_score
Double...
How to think in data stores instead of databases?
...ntiguous ranges of keys. More sophisticated queries are made possible with indexes, which are basically just tables of their own, allowing you to implement more complex queries as scans on contiguous ranges.
Once you've absorbed that, you have the basic knowledge needed to understand the capabilitie...
How to find the php.ini file used by the command line?
...
Then this php instance used no php.ini at all but the default values. The Configuration File line of phpinfo() shows the last place where php looked for an ini file. That can either be the place where it found such a file or the last option which happens to be %SYSTE...
What are the differences between utf8_general_ci and utf8_unicode_ci? [duplicate]
...tf8_unicode_ci uses the standard Unicode Collation Algorithm, supports so called expansions and ligatures, for example:
German letter ß (U+00DF LETTER SHARP S) is sorted near "ss"
Letter Π(U+0152 LATIN CAPITAL LIGATURE OE) is sorted near "OE".
utf8_general_ci does not support expansions/liga...
Pass entire form as data in jQuery Ajax function
...");
var fd = new FormData(myform );
$.ajax({
url: "example.php",
data: fd,
cache: false,
processData: false,
contentType: false,
type: 'POST',
success: function (dataofconfirm) {
// do something with the result
}
...