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How to use classes from .jar files?
...to use a class from a jar file called jtwitter.jar, I downloaded the file, and tried executing it (I found out yesterday that .jar files can be executed by double clicking on them) and Vista gave me an error saying "Failed to load Main-Class Manifest attribute from [path]/jtwitter.jar".
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How to empty (“truncate”) a file on linux that already exists and is protected in someway?
...e it's from csh, so you would do:
cat /dev/null >! file
If I'm wrong and you are using bash, you should do:
cat /dev/null >| file
in bash, you can also shorten that to:
>| file
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Does Dart support enumerations?
...);
}
Those static constants within the class are compile time constants, and this class can now be used in, for example, switch statements:
var a = Fruit.APPLE;
switch (a) {
case Fruit.APPLE:
print('Yes!');
break;
}
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File uploading with Express 4.0: req.files undefined
...
The body-parser module only handles JSON and urlencoded form submissions, not multipart (which would be the case if you're uploading files).
For multipart, you'd need to use something like connect-busboy or multer or connect-multiparty (multiparty/formi...
How do I convert a PDF document to a preview image in PHP? [closed]
...
You need ImageMagick and GhostScript
<?php
$im = new imagick('file.pdf[0]');
$im->setImageFormat('jpg');
header('Content-Type: image/jpeg');
echo $im;
?>
The [0] means page 1.
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AngularJS 1.2 $injector:modulerr
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Hmm, I'm using bower, and it provides .map files - I wonder why Chrome was still showing me errors from the minified file. Thanks for the heads up, @Mart!
– Aditya M P
Sep 8 '13 at 21:02
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How to print to stderr in Python?
...derr, **kwargs)
The function eprint can be used in the same way as the standard print function:
>>> print("Test")
Test
>>> eprint("Test")
Test
>>> eprint("foo", "bar", "baz", sep="---")
foo---bar---baz
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How to get temporary folder for current user
...n checks for the existence of environment variables in the following order and uses the first path found:
The path specified by the TMP environment variable.
The path specified by the TEMP environment variable.
The path specified by the USERPROFILE environment variable.
The Windows directory.
It'...
npm not working - “read ECONNRESET”
...registry.npmjs.org/
so that npm requests for http url instead of https.
and then try the same npm install command
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What is the python keyword “with” used for? [duplicate]
...ources (like file streams). It is similar to the using statement in VB.NET and C#. It allows you to ensure that a resource is "cleaned up" when the code that uses it finishes running, even if exceptions are thrown. It provides 'syntactic sugar' for try/finally blocks.
From Python Docs:
The with sta...