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How to check if a file exists in Go?
... between checking and opening, and anyway you'll need to check the os.Open error regardless. So you simply call os.IsNotExist(err) after you try
to open the file, and deal with its non-existence there (if that requires special handling).
[...] You don't need to check for the paths existing ...
error: default argument given for parameter 1
I'm getting this error message with the code below:
1 Answer
1
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JavaScript isset() equivalent
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the problem with this is that you get an error when you try to check deeper properties, for example: obj.thisdoesntexist.foo !== undefined. In PHP you can use isset or empty and safely at any deep.
– Enrique
Aug 21 '11 at 16:35...
Hash Code and Checksum - what's the difference?
...s or checks the integrity of data (some can go beyond that by allowing for error-correction). "Good" checksums are easy to compute, and can detect many types of data corruptions (e.g. one, two, three erroneous bits).
A hashcode simply describes a mathematical function that maps data to some value. ...
Executing Batch File in C#
...This should work. You could try to dump out the contents of the output and error streams in order to find out what's happening:
static void ExecuteCommand(string command)
{
int exitCode;
ProcessStartInfo processInfo;
Process process;
processInfo = new ProcessStartInfo("cmd.exe", "/...
How to log source file name and line number in Python
...ger.info("This is an info log")
logger.critical("This is critical")
logger.error("An error occurred")
Generates this output:
2017-06-06:17:07:02,158 DEBUG [log.py:11] This is a debug log
2017-06-06:17:07:02,158 INFO [log.py:12] This is an info log
2017-06-06:17:07:02,158 CRITICAL [log.py:1...
git rebase: “error: cannot stat 'file': Permission denied”
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I've only ever seen this error on Windows and what it seems to mean is that something blocked git from modifying a file at the moment when it tried to a apply a patch.
Windows tends to give processes exclusive access to files when it shouldn't reall...
Android Studio Checkout Github Error “CreateProcess=2” (Windows)
...Github project using brand new Android Studio and ended up with this nasty error :
9 Answers
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“Content is not allowed in prolog” when parsing perfectly valid XML on GAE
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This error message is always caused by the invalid XML content in the beginning element. For example, extra small dot “.” in the beginning of XML element.
Any characters before the “<?xml….” will cause above “org.x...
“Cannot update paths and switch to branch at the same time”
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I had a typo in my command which triggered this error; I wasn't spelling my remote correctly!
– qix
Oct 3 '14 at 22:13
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