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Static constant string (class member)
...
51
I'm not sure it's always less overhead - it depends on usage. If this member is meant to be passed as an argument to functions that take co...
Color Tint UIButton Image
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As of iOS 7, there is a new method on UIImage to specify the rendering mode. Using the rendering mode UIImageRenderingModeAlwaysTemplate will allow the image color to be controlled by the button's tint color.
Objective-C
UIButton *button = [UIButt...
How to create enum like type in TypeScript?
... to update any old code:
Disclaimer - this 0.8 example would be broken in newer versions of the TypeScript compiler.
enum TShirtSize {
Small: 3,
Medium: 5,
Large: 8
}
var mySize = TShirtSize.Large;
share
|...
How do I remove an array item in TypeScript?
...cts without a unique key property. @user573434 the filter method returns a new array without the filtered object, so the resulting array does have the object removed.
– Jason
Jun 25 '17 at 3:22
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HTML5 Pre-resize images before uploading
...= filesToUpload[0];
var img = document.createElement("img");
var reader = new FileReader();
reader.onload = function(e) {img.src = e.target.result}
reader.readAsDataURL(file);
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
var MAX_WIDTH = 800;
var MAX_HEIGHT = 600;
var width = img...
JavaScript - Getting HTML form values
...would be sent using an HTTP POST) you can use:
JavaScript
const formData = new FormData(document.querySelector('form'))
for (var pair of formData.entries()) {
// console.log(pair[0] + ': ' + pair[1]);
}
form-serialize (https://code.google.com/archive/p/form-serialize/)
serialize(document.forms[0]...
Convert column classes in data.table
...
For a single column:
dtnew <- dt[, Quarter:=as.character(Quarter)]
str(dtnew)
Classes ‘data.table’ and 'data.frame': 10 obs. of 3 variables:
$ ID : Factor w/ 2 levels "A","B": 1 1 1 1 1 2 2 2 2 2
$ Quarter: chr "1" "2" "3" "4" ...
...
Linux command to list all available commands and aliases
...ates.
– Ants Aasma
Jul 21 '10 at 20:51
1
This does not find commands that are symlinks to executa...
How to group time by hour or by 10 minutes
...ght now.
– Lopsided
Jan 8 '19 at 16:51
2
for SECOND as DATEPART I get an error message (The date...
Object-orientation in C
...s change the dynamic type of an object at runtime! You just reassign it a new vtable pointer. You can even selectively change some of the virtual functions while keeping others, creating new hybrid types. Just be careful to create a new vtable instead of modifying the global vtable, otherwise you...