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How to check if an element is in an array
... has , and a quick search through the book turned up nothing. Any idea how to check for this? I know that there is a method find that returns the index number, but is there a method that returns a boolean like ruby's #include? ?
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SQL: How to properly check if a record exists
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It's better to use either of the following:
-- Method 1.
SELECT 1
FROM table_name
WHERE unique_key = value;
-- Method 2.
SELECT COUNT(1)
FROM table_name
WHERE unique_key = value;
The first alternative should give you no result or one...
nvm keeps “forgetting” node in new terminal session
...sue and it was because I was exporting the NVM_DIR after nvm.sh. Make sure to export the NVM_DIR before.
– maxwell2022
Nov 13 '14 at 5:47
11
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What are deferred objects?
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Deferred Object
As of jQuery 1.5, the Deferred object provides a way to register multiple callbacks into self-managed callback queues, invoke callback queues as appropriate, and relay the success or failure state of any synchronous or asynchronous function.
Deferred Methods:
deferred.done()
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How do I delete unpushed git commits?
I accidentally committed to the wrong branch.
How do I delete that commit?
7 Answers
7...
I change the capitalization of a directory and Git doesn't seem to pick up on it
...on OS X Lion that is under Git version control. I had these lowercase directories and then later capitalized them (e.g. emailaddresses => EmailAddresses), but Git doesn't seem to recognize the change. It still thinks the directories are lowercase when I run git ls-files and other commands.
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What is the difference between a thread and a fiber?
...ve read heard they're available in other languages, could somebody explain to me in simple terms what is the difference between a thread and a fiber.
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Is there a valid reason for enforcing a maximum width of 80 characters in a code file, this day and
Seriously. On a 22" monitor, it only covers maybe a quarter of the screen. I need some ammo to axe down this rule.
32 Answe...
Download and open PDF file using Ajax
... this. Just an <a> link is enough if you set the content-disposition to attachment in the server side code. This way the parent page will just stay open, if that was your major concern (why would you unnecessarily have chosen Ajax for this otherwise?). Besides, there is no way to handle this n...
Is memcached a dinosaur in comparison to Redis? [closed]
...read this part of their readme, I suddenly got a warm, cozy feeling in my stomach:
6 Answers
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