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Get file size, image width and height before upload
...;img src="blob:null/026cceb9-edr4-4281-babb-b56cbf759a3d">
const EL_browse = document.getElementById('browse');
const EL_preview = document.getElementById('preview');
const readImage = file => {
if ( !(/^image\/(png|jpe?g|gif)$/).test(file.type) )
return EL_preview.insertAdj...
Using isKindOfClass with Swift
...icker' in the subsequent 'if' block, then you would want to use: if let _ = touch.view as? UIPickerView { ... }
– Adam Freeman
Nov 7 '15 at 0:38
...
Error: Could not create the Java Virtual Machine Mac OSX Mavericks
...rsion instead of -version. And yes, what an utterly garbage error message -_-;
– Gavin
Feb 27 '18 at 15:58
2
...
Get Enum from Description attribute [duplicate]
...ags.Static))". Otherwise in the else below, the name of the field is 'value__' instead of the real name.
– Dennis
Mar 15 '19 at 8:28
...
Should JAVA_HOME point to JDK or JRE?
I pointed the JAVA_HOME to C:\Program Files (x86)\Java\jre7 . It works fine. Afterwards, I unzipped ant and set up the environment variables related to Ant, I got the following error messages after typing "ant -version"
...
Nodejs send file in response
...tp.createServer(function(request, response) {
var filePath = path.join(__dirname, 'myfile.mp3');
var stat = fileSystem.statSync(filePath);
response.writeHead(200, {
'Content-Type': 'audio/mpeg',
'Content-Length': stat.size
});
var readStream = fileSystem.createR...
Is it possible in SASS to inherit from a class in another file?
...s Default buttons
In your styles.scss file you would have to first import _bootstrap.scss:
@import "_bootstrap.scss";
Then below the import:
button { @extend .btn; }
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Sending command line arguments to npm script
...pt invoked not via "npm run-script" but directly
var port = process.env.npm_package_config_myPort || 8080
That way, by default npm start will use 8080. You can however configure it (the value will be stored by npm in its internal storage):
npm config set myPackage:myPort 9090
Then, when invokin...
Rotating a two-dimensional array in Python
... [4, 5, 6],
[7, 8, 9]
]
def rotated(array_2d):
list_of_tuples = zip(*array_2d[::-1])
return [list(elem) for elem in list_of_tuples]
# return map(list, list_of_tuples)
print(list(rotated(original)))
# [[7, 4, 1], [8, 5, 2], [9, 6, 3]]
The list comp or...
How can I dynamically create a selector at runtime with Objective-C?
... theMethod:(id)methodArg];, you'd write...
void (^impBlock)(id,id) = ^(id _self, id methodArg) {
[_self doSomethingWith:methodArg];
};
and then you need to generate the IMP block dynamically, this time, passing, "self", the SEL, and any arguments...
void(*impFunct)(id, SEL, id) = (void*...