Painting Blue Code: 04/01/2020

2020-04-30

MongoDB - How to create a "Not and" filter

db.collection_name.find({
"other_field": "some_value"

, "$nor": [{
"$and": [
{"field_filter_1": "value_1"}
, {"field_filter_2": "value_2"}
]
}]

});

JavaScript - Find a children object by key/value using Underscore.js

let child_object =
_.find(
parent_object
, function (o) {
return o.key_to_search_by === value_searched;
}
);

2020-04-29

Meteor - List all installed npm packages

meteor npm list

Meteor - Uninstall npm package

meteor npm uninstall package_name_here

JSON - Convert json into an html table online

http://json2table.com/

2020-04-27

MongoDB - Filter for documents dated in the last 30 days

db.collection_name_here.find({
"date_field_name_here": {
$gte: new Date(
(
new Date().getTime()
- (30 * 24 * 60 * 60 * 1000)
)
)
},
});

2020-04-26

MongoDB - IF statement using field regex match condition

"field_name_here":
{"$cond": [
{$regexMatch: {
input: "$source_field_name_here",
regex: /string_to_match_here/i
}}
, NumberInt(1) //value if matched
, NumberInt(0) //value if not matched
]},

2020-04-25

jQuery - Ajax call example

<!DOCTYPE html>
<html>
<head>
<script
src="https://code.jquery.com/jquery-1.12.4.min.js"
integrity="sha256-ZosEbRLbNQzLpnKIkEdrPv7lOy9C27hHQ+Xp8a4MxAQ="
crossorigin="anonymous"></script>
</head>
<body>

<script>
$.ajax({
url: "https://jsonplaceholder.typicode.com/todos/1",
beforeSend: function(xhr) {
//xhr.setRequestHeader("Authorization", "Basic " + btoa("username:password"));
xhr.setRequestHeader("Content-Type", "application/json")
},
type: "POST",
dataType: "json",
contentType: "application/json",
processData: false,
data: '{"foo":"bar"}',

success: function (response) {
alert(JSON.stringify(response));
},

error: function(){
alert("Error!");
}
});
</script>

</body>
</html>