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How to check if an object is an array?
...rite a function that either accepts a list of strings, or a single string. If it's a string, then I want to convert it to an array with just the one item so I can loop over it without fear of an error.
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ValueError: invalid literal for int() with base 10: ''
I am creating a program that reads a file and if the first line of the file is not blank, it reads the next four lines. Calculations are performed on those lines and then the next line is read. If that line is not empty it continues. However, I am getting this error:
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How to sum array of numbers in Ruby?
... array.map(&:price).inject(0, :+) is a bit safer. It makes sure that if you have an empty list you get 0 instead of nil.
– johnf
Oct 4 '11 at 9:21
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iTunes Connect: How to choose a good SKU?
...t has to be unique.
Every time I have to enter the SKU I use the App identifier (e.g. de.mycompany.myappname) because this is already unique.
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How do I check if an index exists on a table field in MySQL?
...me instead of Key_name, this way you don't need to find out the index name if it is automatically added without name.
– Programista
Apr 9 '14 at 11:05
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Find a value in an array of objects in Javascript [duplicate]
I know similar questions have been asked before, but this one is a little different. I have an array of unnamed objects, which contain an array of named objects, and I need to get the object where "name" is "string 1". Here is an example array.
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Rails: How to change the text on the submit button in a Rails Form
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If you want to keep the button style, you can do: f.button :submit, "My Submit Text"
– jonathanrz
Oct 17 '13 at 18:17
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Total size of the contents of all the files in a directory [closed]
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If you want the 'apparent size' (that is the number of bytes in each file), not size taken up by files on the disk, use the -b or --bytes option (if you got a Linux system with GNU coreutils):
% du -sbh <directory>
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Difference between System.DateTime.Now and System.DateTime.Today
Can anyone explain the difference between System.DateTime.Now and System.DateTime.Today in C#.NET? Pros and cons of each if possible.
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How do I tell Gradle to use specific JDK version?
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If you are executing using gradle wrapper you can also do it like ./gradlew -Dorg.gradle.java.home=/path_to_jdk_directory. Good if you don't want to touch gradle.properties.
– david.schreiber
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