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Select random lines from a file
In a Bash script, I want to pick out N random lines from input file and output to another file.
4 Answers
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valueOf() vs. toString() in Javascript
In Javascript every object has a valueOf() and toString() method. I would have thought that the toString() method got invoked whenever a string conversion is called for, but apparently it is trumped by valueOf().
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My docker container has no internet
I had it working allright but now it stopped. I tried the following commands with no avail:
22 Answers
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Best way to test if a generic type is a string? (C#)
I have a generic class that should allow any type, primitive or otherwise. The only problem with this is using default(T) . When you call default on a value type or a string, it initializes it to a reasonable value (such as empty string). When you call default(T) on an object, it returns null. Fo...
How can I check whether a numpy array is empty or not?
How can I check whether a numpy array is empty or not?
4 Answers
4
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Hour from DateTime? in 24 hours format
So i have this DateTime? and what i want to do is to obtain the hour but show it in 24 hours format.
For example:
If the hour is 2:20:23 p.m. i want to convert it to 14:20 and that's it.
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How to see if an NSString starts with a certain other string?
I am trying to check to see if a string that I am going to use as URL starts with http. The way I am trying to check right now doesn't seem to be working. Here is my code:
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Can the jQuery UI Datepicker be made to disable Saturdays and Sundays (and holidays)?
I use a datepicker for choosing an appointment day. I already set the date range to be only for the next month. That works fine. I want to exclude Saturdays and Sundays from the available choices. Can this be done? If so, how?
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Algorithm to return all combinations of k elements from n
I want to write a function that takes an array of letters as an argument and a number of those letters to select.
71 Answe...