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What is the dual table in Oracle?
...IO was usually logical IO (not involving physical disk access) as the disk blocks were usually already cached in memory. This resulted in a large amount of logical IO against the DUAL table.
Later versions of the Oracle database have been optimized and the database no longer performs physical or lo...
What is a reasonable code coverage % for unit tests (and why)? [closed]
...ible exception; of course you can't do that. You SHOULD aim to test every block of code that handles exceptions. For example, if you have a requirement that when block X throws an exception, the exception is logged in the database, the green stripe at the bottom of the screen turns red, and an ema...
How to list out all the subviews in a uiviewcontroller in iOS?
...on:
@implementation UIView (childViews)
- (NSArray*) allSubviews {
__block NSArray* allSubviews = [NSArray arrayWithObject:self];
[self.subviews enumerateObjectsUsingBlock:^( UIView* view, NSUInteger idx, BOOL*stop) {
allSubviews = [allSubviews arrayByAddingObjectsFromArray:[view ...
Run time error "Stack size 8188kb" 报错原理及解决方法 · App Inventor 2 中文网
...g:hover { color: #3773f5 } .feedback-pop .feedback-img { display: inline-block; width: 24px; height: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } /*手机版：反馈浮动按钮收小*/ @media screen and (max-width: 700px) { .feedback-po...
How can I list the contents of a directory in Python?
Can’t be hard, but I’m having a mental block.
8 Answers
8
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Android存储系统基础知识：内部存储，外部存储，App特定目录 ASD(app speci...
...g:hover { color: #3773f5 } .feedback-pop .feedback-img { display: inline-block; width: 24px; height: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } /*手机版：反馈浮动按钮收小*/ @media screen and (max-width: 700px) { .feedback-po...
micro:bit 实验03 - 做一块实时温度看板 · App Inventor 2 中文网
...g:hover { color: #3773f5 } .feedback-pop .feedback-img { display: inline-block; width: 24px; height: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } /*手机版：反馈浮动按钮收小*/ @media screen and (max-width: 700px) { .feedback-po...
构建具有多个屏幕的应用程序 · App Inventor 2 中文网
...g:hover { color: #3773f5 } .feedback-pop .feedback-img { display: inline-block; width: 24px; height: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } /*手机版：反馈浮动按钮收小*/ @media screen and (max-width: 700px) { .feedback-po...
ComponentTools 拓展：设置组件的边距等 · App Inventor 2 中文网
...g:hover { color: #3773f5 } .feedback-pop .feedback-img { display: inline-block; width: 24px; height: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } /*手机版：反馈浮动按钮收小*/ @media screen and (max-width: 700px) { .feedback-po...
What are the precise rules for when you can omit parenthesis, dots, braces, = (functions), etc.?
...ss-by-name parameter, which results in a String (that is, it can be a code block which returns a string) as opposed to function parameters,
def myOp(functionParam: () => String)
which says myOp takes a function which has zero parameters and returns a String.
(Mind you, pass-by-name parameters...