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In a Bash script, how can I exit the entire script if a certain condition occurs?
...script in Bash to test some code. However, it seems silly to run the tests if compiling the code fails in the first place, in which case I'll just abort the tests.
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How can I read a function's signature including default argument values?
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If a function has argument annotations or keyword only arguments (= if you are using Python 3) you have to call getfullargspec instead. (ValueError: Function has keyword-only arguments or annotations, use getfullargspec() API...
What is the best way to compare floats for almost-equality in Python?
...dds the math.isclose and cmath.isclose functions as described in PEP 485.
If you're using an earlier version of Python, the equivalent function is given in the documentation.
def isclose(a, b, rel_tol=1e-09, abs_tol=0.0):
return abs(a-b) <= max(rel_tol * max(abs(a), abs(b)), abs_tol)
rel_...
Why does GitHub recommend HTTPS over SSH?
..., and by users who are new to all this.
There is no inherent flaw in SSH (if there was they would disable it) -- in the links below, you will see that they still provide details about SSH connections too:
HTTPS is less likely to be blocked by a firewall.
https://help.github.com/articles/which-re...
Checking if a key exists in a JS object
...ust an object.
You can use the hasOwnProperty method to check for a key:
if (obj.hasOwnProperty("key1")) {
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}
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How to represent multiple conditions in a shell if statement?
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Classic technique (escape metacharacters):
if [ \( "$g" -eq 1 -a "$c" = "123" \) -o \( "$g" -eq 2 -a "$c" = "456" \) ]
then echo abc
else echo efg
fi
I've enclosed the references to $g in double quotes; that's good practice, in general. Strictly, the parentheses ar...
How can I determine if a JavaScript variable is defined in a page? [duplicate]
How can i check in JavaScript if a variable is defined in a page? Suppose I want to check if a variable named "x" is defined in a page, if I do if(x != null) , it gives me an error.
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iOS detect if user is on an iPad
...iPad and everything but there needs to be one adjustment. I need to detect if the current device is an iPad. What code can I use to detect if the user is using an iPad in my UIViewController and then change something accordingly?
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Limit Decimal Places in Android EditText
...anage your finances. I'm using an EditText Field where the user can specify an amount of money.
37 Answers
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Difference between VARCHAR and TEXT in MySQL [duplicate]
...e stored string.
cannot be (fully) part of an index. One would need to specify a prefix length.
VARCHAR(M)
variable max size of M characters
M needs to be between 1 and 65535
takes 1 + c bytes (for M ≤ 255) or 2 + c (for 256 ≤ M ≤ 65535) bytes of disk space where c is the length of the sto...