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How to check whether a file is empty or not?

I have a text file. How can I check whether it's empty or not? 10 Answers 10 ...
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Center HTML Input Text Field Placeholder

How can I centre the input field's placeholder's alignment in a html form? 10 Answers ...
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How to sort a list of strings numerically?

...ealize that the sort() function of Python was weird. I have a list of "numbers" that are actually in string form, so I first convert them to ints, then attempt a sort. ...
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Convert string to symbol-able in ruby

Symbols are usually represented as such 7 Answers 7 ...
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How to update attributes without validation

I've got a model with its validations, and I found out that I can't update an attribute without validating the object before. ...
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Why does mongoose always add an s to the end of my collection name

For example, this code results in a collection called "datas" being created 8 Answers ...
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Recursively add the entire folder to a repository

I am trying to add a branch to the master branch on GitHub and push a folder onto that branch. 15 Answers ...
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Enum String Name from Value

I have an enum construct like this: 12 Answers 12 ...
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Java String remove all non numeric characters

Trying to remove all letters and characters that are not 0-9 and a period. I'm using Character.isDigit() but it also removes decimal, how can I also keep the decimal? ...
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How can I kill a process by name instead of PID?

Sometimes when I try to start Firefox it says "a Firefox process is already running". So I have to do this: 18 Answers ...