大约有 35,480 项符合查询结果（耗时：0.0380秒） [XML]
Using the Swift if let with logical AND operator &&
...r as? UITabBarController where tabBarController.viewControllers.count > 0 {
println("do stuff")
}
This uses the where clause.
Another example, this time casting AnyObject to Int, unwrapping the optional, and checking that the unwrapped optional meets the condition:
if let w = width a...
Using CSS how to change only the 2nd column of a table
...
answered Mar 29 '10 at 0:04
Nick Craver♦Nick Craver
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...
How to make a element expand or contract to its parent container?
... the container, it's the size of your drawing. Define your viewBox to be 100 units in width, then define your rect to be 10 units. After that, however large you scale the SVG, the rect will be 10% the width of the image.
s...
Inserting a text where cursor is using Javascript/jquery
...
return;
}
var scrollPos = txtarea.scrollTop;
var strPos = 0;
var br = ((txtarea.selectionStart || txtarea.selectionStart == '0') ?
"ff" : (document.selection ? "ie" : false));
if (br == "ie") {
txtarea.focus();
var range = document.selection.createRange();
...
iOS 7 TextKit - How to insert images inline with text?
...
Salman Zaidi
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answered Jan 5 '14 at 5:57
bilobatumbilobatum
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How do you create a toggle button?
...|
edited Sep 24 '17 at 16:03
Geoman Yabes
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answere...
Sort Dictionary by keys
...ys and values, like this:
let sortedKeysAndValues = sorted(dictionary) { $0.0 < $1.0 }
println(sortedKeysAndValues) // [(A, [1, 2]), (D, [5, 6]), (Z, [3, 4])]
EDIT2: The monthly changing Swift syntax currently prefers
let sortedKeys = Array(dictionary.keys).sort(<) // ["A", "D", "Z"]
The...
Getting exact error type in from DbValidationException
...iest way I've found to get instant insight into these errors.
For Visual 2012+ users who care only about the first error and might not have a catch block, you can even do:
((System.Data.Entity.Validation.DbEntityValidationException)$exception).EntityValidationErrors.First().ValidationErrors.First(...
JavaScript - get the first day of the week from current date
... method of Date objects, you can know the number of day of the week (being 0=Sunday, 1=Monday, etc).
You can then subtract that number of days plus one, for example:
function getMonday(d) {
d = new Date(d);
var day = d.getDay(),
diff = d.getDate() - day + (day == 0 ? -6:1); // adjust whe...
Better way to shuffle two numpy arrays in unison
...ple: Let's assume the arrays a and b look like this:
a = numpy.array([[[ 0., 1., 2.],
[ 3., 4., 5.]],
[[ 6., 7., 8.],
[ 9., 10., 11.]],
[[ 12., 13., 14.],
[ 15., 16., 17.]]])
b = numpy.a...