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Does a javascript if statement with multiple conditions test all of them?
In javascript, when using an if statement with multiple conditions to test for, does javascript test them all regardless, or will it bail before testing them all if it's already false?
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Dictionary vs Object - which is more efficient and why?
...ave time as well as memory?
Comparing the three approaches on my computer:
test_slots.py:
class Obj(object):
__slots__ = ('i', 'l')
def __init__(self, i):
self.i = i
self.l = []
all = {}
for i in range(1000000):
all[i] = Obj(i)
test_obj.py:
class Obj(object):
def __init__(self, i):
...
How to paste text to end of every line? Sublime 2
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Let's say you have these lines of code:
test line one
test line two
test line three
test line four
Using Search and Replace Ctrl+H with Regex let's find this: ^ and replace it with ", we'll have this:
"test line one
"test line two
"test line three
"test line fou...
How do I turn on SQL debug logging for ActiveRecord in RSpec tests?
I have some RSpec tests for my models and I would like to turn on SQL ActiveRecord logging just like I see in the Rails server mode. How to do that?
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Jasmine JavaScript Testing - toBe vs toEqual
...e whether the values for their keys are equivalent). Both of the following tests will pass:
expect(b).not.toBe(c);
expect(b).toEqual(c);
Hope that helps clarify some things.
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Efficiency of premature return in a function
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There is no difference at all:
=====> cat test_return.cpp
extern void something();
extern void something2();
void test(bool b)
{
if(b)
{
something();
}
else
something2();
}
=====> cat test_return2.cpp
extern void something();
exter...
Detect if device is iOS
...l answers below needs to take that into account now.
This might be the shortest alternative that also covers iOS 13:
function iOS() {
return [
'iPad Simulator',
'iPhone Simulator',
'iPod Simulator',
'iPad',
'iPhone',
'iPod'
].includes(navigator.platform)
// iPad on iOS ...
Escape double quotes in parameter
In Unix I could run myscript '"test"' and I would get "test" .
5 Answers
5
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How to tell if a string is not defined in a Bash shell script
...x" ]; then echo VAR is set but empty; fi
You probably can combine the two tests on the second line into one with:
if [ -z "$VAR" -a "${VAR+xxx}" = "xxx" ]; then echo VAR is set but empty; fi
However, if you read the documentation for Autoconf, you'll find that they do not recommend combining terms...
How do you manage databases in development, test, and production?
...d examples of how to manage database schemas and data between development, test, and production servers.
14 Answers
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