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How do I check whether a file exists without exceptions?

How do I check if a file exists or not, without using the try statement? 39 Answers ...
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How to concatenate items in a list to a single string?

Is there a simpler way to concatenate string items in a list into a single string? Can I use the str.join() function? 11...
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How do I remove an array item in TypeScript?

I have an array that I've created in TypeScript and it has a property that I use as a key. If I have that key, how can I remove an item from it? ...
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Awaiting multiple Tasks with different results

... After you use WhenAll, you can pull the results out individually with await: var catTask = FeedCat(); var houseTask = SellHouse(); var carTask = BuyCar(); await Task.WhenAll(catTask, houseTask, carTask); var cat = await catTask; var house = await houseTask; var car = await carTask; You...
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Image.Save(..) throws a GDI+ exception because the memory stream is closed

...inary data which i want to save as an image. When i try to save the image, it throws an exception if the memory stream used to create the image, was closed before the save. The reason i do this is because i'm dynamically creating images and as such .. i need to use a memory stream. ...
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What is the difference between the 'COPY' and 'ADD' commands in a Dockerfile?

...t: If is a local tar archive in a recognized compression format (identity, gzip, bzip2 or xz) then it is unpacked as a directory. Resources from remote URLs are not decompressed. Note that the Best practices for writing Dockerfiles suggests using COPY where the magic of ADD is not required. ...
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Algorithm to find Largest prime factor of a number

...ethod which is very fast if the input number has two factors very close to its square root is known as Fermat factorisation. It makes use of the identity N = (a + b)(a - b) = a^2 - b^2 and is easy to understand and implement. Unfortunately it's not very fast in general. The best known method for fa...
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Why is “Set as Startup” option stored in the suo file and not the sln file?

It seems like this setting should be stored in the solution file so it's shared across all users and part of source code control. Since we don't check in the suo file, each user has to set this separately which seems strange. ...
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Reusing output from last command in Bash

...ster? E.g. something similar to $? capturing the output instead of the exit status. 12 Answers ...
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How do I consume the JSON POST data in an Express application

... I think you're conflating the use of the response object with that of the request. The response object is for sending the HTTP response back to the calling client, whereas you are wanting to access the body of the request. See this answer which provides some guidance. If you are ...