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variable === undefined vs. typeof variable === “undefined”
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edited Feb 26 '16 at 15:37
answered Jan 18 '11 at 15:10
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What does “SyntaxError: Missing parentheses in call to 'print'” mean in Python?
...ng wrong:
>>> print "Hello, World!"
File "<stdin>", line 1
print "Hello, World!"
^
SyntaxError: invalid syntax
As for why print became an ordinary function in Python 3, that didn't relate to the basic form of the statement, but rather to how you did mo...
Delete keychain items when an app is uninstalled
...om keychain here
[[NSUserDefaults standardUserDefaults] setValue:@"1strun" forKey:@"FirstRun"];
[[NSUserDefaults standardUserDefaults] synchronize];
}
//...Other stuff that usually happens in didFinishLaunching
}
This checks for and sets a "FirstRun" key/value in NSUserDef...
Errors: “INSERT EXEC statement cannot be nested.” and “Cannot use the ROLLBACK statement within an I
I have three stored procedures Sp1 , Sp2 and Sp3 .
12 Answers
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Rails 4: how to use $(document).ready() with turbo-links
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When to use a “has_many :through” relation in Rails?
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178
Say you have two models: User and Group.
If you wanted to have users belong to groups, then ...
How to enter in a Docker container already running with a new TTY
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11 Answers
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What does ':' (colon) do in JavaScript?
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Find all files in a directory with extension .txt in Python
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2471
You can use glob:
import glob, os
os.chdir("/mydir")
for file in glob.glob("*.txt"):
print(...