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Best way to find if an item is in a JavaScript array? [duplicate]
What is the best way to find if an object is in an array?
8 Answers
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How do I check if a list is empty?
For example, if passed the following:
27 Answers
27
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Check if inputs are empty using jQuery
I have a form that I would like all fields to be filled in. If a field is clicked into and then not filled out, I would like to display a red background.
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Check if a key exists inside a json object
The above is the JSON object I'm dealing with. I want to check if the 'merchant_id' key exists. I tried the below code, but it's not working. Any way to achieve it?
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What issues should be considered when overriding equals and hashCode in Java?
...reflexive, symmetric, and transitive). In addition, it must be consistent (if the objects are not modified, then it must keep returning the same value). Furthermore, o.equals(null) must always return false.
hashCode() (javadoc) must also be consistent (if the object is not modified in terms of equa...
Boolean method naming readability
...fered. As it makes your conditional checks far more like natural english:
if userExists ...
But I guess there is no hard and fast rule - just be consistent
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What is the difference between And and AndAlso in VB.NET?
In VB.NET, what is the difference between And and AndAlso ? Which should I use?
11 Answers
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Check if option is selected with jQuery, if not select a default
Using jQuery, how do you check if there is an option selected in a select menu, and if not, assign one of the options as selected.
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Simple C example of doing an HTTP POST and consuming the response
...sage body separated by a blank line. The blank line is ALWAYS needed even if there is no message body. The header starts with a command and has additional lines of key value pairs separated by a colon and a space. If there is a message body, it can be anything you want it to be.
Lines in the hea...
How to check if a map contains a key in Go?
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One line answer:
if val, ok := dict["foo"]; ok {
//do something here
}
Explanation:
if statements in Go can include both a condition and an initialization statement. The example above uses both:
initializes two variables - val will r...