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Correct way to use get_or_create?
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FYI created is a boolean. True if created, False if it is fetched
– Josh
Oct 4 '18 at 8:45
3
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How do I cast a variable in Scala?
...2D] method, but with greater flexibility. For example, you could provide different branches for various types, effectively performing multiple conditional casts at the same time. Finally, you don't really need to throw an exception in the catch-all area, you could also return null (or preferably, ...
How to create standard Borderless buttons (like in the design guideline mentioned)?
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If you use HoloEverywhere it works for API level 7+. You must change ?android:attr/selectableItemBackground for ?attr/selectableItemBackground and ?android:attr/dividerVerticalfor ?attr/dividerVertical
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Explain the encapsulated anonymous function syntax
...ork because it is being parsed as a FunctionDeclaration, and the name identifier of function declarations is mandatory.
When you surround it with parentheses it is evaluated as a FunctionExpression, and function expressions can be named or not.
The grammar of a FunctionDeclaration looks like this:...
Creating PHP class instance with a string
...str;
$object = new $class();
When using namespaces, supply the fully qualified name:
$class = '\Foo\Bar\MyClass';
$instance = new $class();
Other cool stuff you can do in php are:
Variable variables:
$personCount = 123;
$varname = 'personCount';
echo $$varname; // echo's 123
And variable fu...
图片轮播使用指导 · App Inventor 2 中文网
...鼠标移动时拖动元素 document.onmousemove = function(e) { if (!isDragging) return; element.style.left = (e.clientX - offsetX) + 'px'; element.style.top = (e.clientY - offsetY) + 'px'; }; // 鼠标释放时停止拖动 document.onmouseup = function(...
PDB文件：每个开发人员都必须知道的 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...入GAC的.NET的binary，需要将PDB文件拷贝到C:\Windows\assembly\GAC_MSIL\Example\1.0.0.0__682bc775ff82796a类似的binary所在的目录。另一个变通的方法是定义环境变量DEVPATH，从而代替使用命令GACUTIL将binary放入GAC中。在定义DEVPATH后，只需要将binary和...
Disable spell-checking on HTML textfields
...ccepted? it does not make sense because it can override the users settings if the browser allows it. see ms2ger's answer.
– usr
Aug 15 '09 at 22:52
1
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Setting onClickListener for the Drawable right of an EditText [duplicate]
...left, Drawable top,
Drawable right, Drawable bottom) {
if (left != null) {
drawableLeft = left;
}
if (right != null) {
drawableRight = right;
}
if (top != null) {
drawableTop = top;
}
if (bottom !...
angularjs directive call function specified in attribute and pass an argument to it
I want to create a directive that links to an attribute. The attribute specifies the function that should be called on the scope. But I also want to pass an argument to the function that is determined inside the link function.
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