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Capture HTML Canvas as gif/jpg/png/pdf?
...anvas = document.getElementById("canvas");
var context = canvas.getContext("2d");
context.fillStyle = "green";
context.fillRect(50, 50, 100, 100);
// no argument defaults to image/png; image/jpeg, etc also work on some
// implementations -- image/png...
JUnit test with dynamic number of tests
...e eclipse test runner and with JUnit 4 Method you can re-execute the tests etc. I am only wondering how I can have eclipse show a name for the test - it only shows [0], [1] etc.
– Hans-Peter Störr
Dec 12 '08 at 16:21
...
How to get the instance id from within an ec2 instance?
...dvanced use (retrieve instance ID as well as availability zone and region, etc.):
EC2_INSTANCE_ID="`wget -q -O - http://169.254.169.254/latest/meta-data/instance-id || die \"wget instance-id has failed: $?\"`"
test -n "$EC2_INSTANCE_ID" || die 'cannot obtain instance-id'
EC2_AVAIL_ZONE="`wget -q -O...
How to install GCC piece by piece with GMP, MPFR, MPC, ELF, without shared libraries?
...r system package manager such as:
apt install gcc # for Debian, Ubuntu, etc.
yum install gcc # for RedHat, CentOS, etc.
brew install gcc # for Mac OS X
The Hard Way
GCC says the answer here is "the hard way" because it builds everything piece by piece, and does not use shared libraries.
...
JAX-RS / Jersey how to customize error handling?
...status(Response.Status.NOT_FOUND).
entity(new ErrorResponse(exception.getClass().toString(),
exception.getMessage()) ).
build();
}
}
Create above class. This will handle 404 (NotFoundException) and here in toResponse method you can give your custom response. Similarly there...
How to download image from url
... need of Format extension in URi
If You don't know the Format(.png, .jpeg etc) of Image
public void SaveImage(string filename, ImageFormat format)
{
WebClient client = new WebClient();
Stream stream = client.OpenRead(imageUrl);
Bitmap bitmap; bitmap = new Bitmap(stream);
if (...
Find Java classes implementing an interface [duplicate]
...lows you to disable the default filters that pick up @Component, @Service, etc. The TypeFilter can be included using addIncludeFilter and the definitions retrieved via findCandidateComponents("com.my.package")
– Max
Feb 7 '16 at 18:08
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Should an Enum start with a 0 or a 1?
...ath for you. (i.e. [Flags] enum MyFlags { None = 0, A, B, Both = A | B, /* etc. */ } is way more readable, than [Flags] enum MyFlags { None = 0, A = 1, B = 2, Both = 3, /* etc */ }.)
– BrainSlugs83
Jun 7 '16 at 20:39
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Generate Java class from JSON?
...ble as a maven plugin, ant task, gradle extension, CLI tool, java library, etc...
– joelittlejohn
Nov 20 '17 at 23:42
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Redirecting Output from within Batch file
.... The batch file contains commands to get the time, IP information, users, etc.
10 Answers
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