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App Inventor 2 中的响应式设计 · App Inventor 2 中文网
..., but set the size of the canvas to be a fixed number of pixels. In other words, while the rest of your app can be responsive, the canvas (and the drawings within it) will have fixed size. You’ll have to choose the fixed size, though, and that size might not look good on all devices.
Use respo...
How to implement a many-to-many relationship in PostgreSQL?
... messages. Use legal, lower case, unquoted identifiers. Never use reserved words and avoid double-quoted mixed case identifiers if you can.
"name" is not a good name. I renamed the column of the table product to be product (or product_name or similar). That is a better naming convention. Otherwise,...
What exactly is Python's file.flush() doing?
...em buffers are synchronized with the storage devices they're for, in other words, that method will copy data from the operating system buffers to the disk.
Typically you don't need to bother with either method, but if you're in a scenario where paranoia about what actually ends up on disk is a good...
What is Dependency Injection and Inversion of Control in Spring Framework?
...mplements IoC principle for resolving dependencies of objects.
In simpler words, when you are trying to write code, you will be creating and using different classes. One class (Class A) may use other classes (Class B and/or D). So, Class B and D are dependencies of class A.
A simple analogy will b...
Purpose of ESI & EDI registers?
...irms most of it, and this (slide 17) others:
AX = accumulator
DX = double word accumulator
CX = counter
BX = base register
They look like general purpose registers, but there are a number of instructions which (unexpectedly?) use one of them—but which one?—implicitly.
...
techniques for obscuring sensitive strings in C++
...hat outdated, of tools to protect your binary.
Some of them are free.
Password matching
Someone here discussed hashing password+salt.
If you need to store the key to match it against some kind of user submitted password, you should use a one-way hashing function, preferrably by combining userna...
Why do people write the #!/usr/bin/env python shebang on the first line of a Python script?
...
An important word of warning, env's return value eventually expires. Which is unlikely to affect you if you are running short-lived processes. However, I've had processes dying with the message /usr/bin/env: Key has expired after many hou...
clang: how to list supported target architectures?
...to an llvm::Triple object (defined in include/llvm/ADT/Triple.h). In other words, to dump all available triples requires solving the Halting Problem. See, for example, llvm::ARM_MC::ParseARMTriple(...) which special-cases parsing the string "generic".
Ultimately, though, the "triple" is mostly a ba...
Can you resolve an angularjs promise before you return it?
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I cant describe with words how happy Im, you saved me so much time h.coates!
– rilar
Apr 2 '14 at 10:33
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Is there any way in C# to override a class method with an extension method?
...to the "scope" you desire. I am calling it scope here for lack of a better word. Hopefully someone can let me know what it is actually called.
You might have guessed by my "pass-through" method names that I also toyed with the idea of passing delegates to them in the hopes that a single method or t...