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How can I check if a directory exists in a Bash shell script?
What command can be used to check if a directory exists or not, within a Bash shell script?
35 Answers
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Detect the specific iPhone/iPod touch model [duplicate]
...a multiplayer on an iPod 1st gen and iPhone 2G I need to check for the specific device model.
6 Answers
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How to check for null in Twig?
... on what exactly you need:
is null checks whether the value is null:
{% if var is null %}
{# do something #}
{% endif %}
is defined checks whether the variable is defined:
{% if var is not defined %}
{# do something #}
{% endif %}
Additionally the is sameas test, which does a type st...
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
8
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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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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 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...
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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