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What's the difference between eval, exec, and compile?
... call last):
File "<stdin>", line 1, in <module>
File "<string>", line 1
a = 47
^
SyntaxError: invalid syntax
The compile in 'exec' mode compiles any number of statements into a bytecode that implicitly always returns None, whereas in 'eval' mode it compiles a sin...
powershell - extract file name and extension
... extension and there may be more dots in the name, so I need to search the string from the right and when I find first dot (or last from the left), extract the part on the right side and the part on the left side from that dot.
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Find MongoDB records where array field is not empty
...ll of my records have a field called "pictures". This field is an array of strings.
11 Answers
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Skip callbacks on Factory Girl and Rspec
... create users without the callback by default because the methods used run extra stuff I don't normally want in my test examples.
----------UPDATE------------
I stopped using skip_callback because there were some inconsistency issues in the test suite.
Alternative Solution 1 (use of stub and unstu...
How to sort an array in Bash
...
Next, the sort <<<"${array[*]}" part
<<<, called here strings, takes the expansion of "${array[*]}", as explained above, and feeds it into the standard input of sort.
With our example, sort is fed this following string:
a c
b
f
3 5
Since sort sorts, it produces:
3 5
a c
b
f...
Get the time difference between two datetimes
...you're really keen on that specific formatting, you'll have to build a new string yourself. A cheap way would be
[diff.asHours(), diff.minutes(), diff.seconds()].join(':')
where var diff = moment.duration(now.diff(then)). This doesn't give you the zero-padding on single digit values. For that, you...
How to keep one variable constant with other one changing with row in excel
... It should be noted that the dollar sign keeps the adjacent character constant when dragging. $B1 (B will be kept constant and the 1 will count up) will be different to $B$1 (both B and 1 will remain constant)
– Jonno_FTW
Jan 28 '10 at 17:40
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Build Android Studio app via command line
... an emulator)
Bonus
I set up an alias in my ~/.bash_profile, to make it a 2char command.
alias bi="gradlew && adb install -r exampleApp.apk"
(Short for Build and Install)
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Difference between Select and ConvertAll in C#
...gt; calls, while ConvertAll will loop through the underlying array without extra calls or range checks.
3) Select will create an extra IEnumerable<T> object.
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What's the difference between and , and ?
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<strong> and <em> add extra semantic meaning to your document. It just so happens that they also give a bold and italic style to your text.
You could of course override their styling with CSS.
<b> and <i> on the other hand only apply...