vast | Video Ad Serving Template | Video Utils library
kandi X-RAY | vast Summary
kandi X-RAY | vast Summary
Video Ad Serving Template (VAST)
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of vast
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vast Examples and Code Snippets
const params = new URLSearchParams({ foo: 'bar' });
params.append('extraparam', 'value');
axios.post('/foo', params);
Community Discussions
Trending Discussions on vast
QUESTION
I've been putting together my own disassembler for Sega Mega Drive ROMs, basing my initial work on the MOTOROLA M68000 FAMILY Programmer’s Reference Manual. Having disassembled a considerable chunk of the ROM, I've attempted to reassemble this disassembled output, using VASM as it can accept the Motorola assembly syntax, using its mot
syntax module.
Now, for the vast majority of the reassembly, this has worked well, however there is one wrinkle with operations that have effective addresses defined by the "Program Counter Indirect with Index (8-Bit Displacement) Mode". Given that I'm only now learning Motorola 68000 assembly, I wanted to confirm my understanding and to ask: what is the proper syntax for these operations?
InterpretationFor example, if I have two words:
...ANSWER
Answered 2022-Feb-27 at 12:17In my opinion, both
QUESTION
Suppose I have the following model (vastly simplified, for the sake of the question):
...ANSWER
Answered 2022-Jan-29 at 12:55Subscripting makes a query to the database, so as long as the values are not saved to the database, you get the old ones.
A solution is to simply cast it to a list, such that subscripting will obtain the i-th element of the list:
QUESTION
ANSWER
Answered 2022-Jan-29 at 12:16A possible solution, which works for an arbitrary number of .
:
QUESTION
I'm working on a statistics project involving cards and shuffling, and I've run across an issue with random number generation.
From a simple bit of math there are 52! possible deck permutations, which is approximately 2^226. I believe this means that I need a random number generator with a minimum of 226 bits of entropy, and possibly more (I'm not certain of this concept so any help would be great).
From a quick google search, the Math.random()
generator in Java has a maximum of 48 bits of entropy, meaning that the vast majority of possible deck combinations would not be represented. So this does not seem to be the way to go in Java.
I was linked to this generator but it doesn't have a java implementation yet. Also for a bit of context here is one of my shuffling algorithms (it uses the Fisher-Yates method). If you have any suggestions for better code efficiency that would be fantastic as well.
...ANSWER
Answered 2022-Jan-15 at 01:10Have you looked into the recent additions that are included in JDK 17?
There are plenty of algorithms available:
For shuffling cards you likely don't need something that is cryptographically secure.
Using Collections.shuffle should do the trick if you provide a decent RNG.
QUESTION
Consider the following code:
...ANSWER
Answered 2021-Oct-27 at 12:26If
std::exit
is called to end a program during the destruction of an object with static or thread storage duration, the program has undefined behavior.
QUESTION
I am trying to integrate a very simple ODE using boost odeint. For some cases, the values are the same (or very similar) to Python's scipy odeint function. But for other initial conditions, the values are vastly different.
The function is: d(uhat) / dt = - alpha^2 * kappa^2 * uhat where alpha is 1.0, and kappa is a constant depending on the case (see values below).
I have tried several different ODE solvers from boost, and none seem to work.
Update: The code below is now working.
In the code below, the first case gives nearly identical results, the 2nd case is kind of trivial (but reassuring), and the 3rd case gives erroneous answers in the C++ version.
Here is the C++ version:
...ANSWER
Answered 2021-Oct-13 at 15:29This has all the hallmarks of precision issues.
Simply replacing double
with long double
gives:
QUESTION
I'm trying to add some background mp4/gif animation to my webpage, but for some reason it's not working - it only shows some black placeholder for (what seems to be) the animation.
This is the library I've tried to use: https://github.com/pespantelis/vue-videobg
Having followed the instructions, I've ended up with this (only showing relevant sections):
The main.js
file:
ANSWER
Answered 2021-Sep-19 at 06:43Sometimes .. in the path does not work. Try giving the complete path like
QUESTION
I am curious about the vastly different performance characteristics of running x86-64 binaries on the Apple M1 platform using Rosetta 2 vs. emulation, for example what Docker Desktop currently does using QEMU.
I understand why emulation is so slow, but an explanation for why Rosetta 2 is so fast has been detailed in this Twitter thread: https://twitter.com/ErrataRob/status/1331735383193903104
The gist of that explanation is that under usual circumstances, arm and x86 have opposite (and incompatible) memory addressing schemes which require significant emulation overhead, but the M1 chip addresses this with a hardware optimization that allows it to access memory using both addressing schemes. Effectively, when Rosetta 2-emulated instructions are being run, a flag is set to let the processor know to use the x86-style addressing scheme.
Assuming this explanation is reasonable (and if anyone has better-sourced reporting than the above Twitter thread I would appreciate it in the comments for inclusion), is it technically plausible that this optimization could be leveraged for full hardware emulation, for example running x86-64 Linux Docker containers, or running a full x86-64 Windows desktop virtual machine a la VMware Fusion/VirtualBox? Or, does the separate operating system layer in those scenarios preclude being able to leverage the memory ordering optimization?
Separately, is this processor mode (flags or instructions) documented and published for 3rd-party use, or is it private to Apple only?
...ANSWER
Answered 2021-Sep-04 at 20:09Not memory addressing, memory ordering. i.e. for lock-free atomics used for inter-thread synchronization - in x86, every asm load/store is acquire/release respectively. (With real x86 CPUs doing speculative early loads so performance doesn't suffer under normal conditions when a single thread is operating on memory that other threads aren't writing.)
M1 has hardware support for a mode like that, as well as a weakly-ordered mode to run native AArch64 code most efficiently. See
- https://singhkays.com/blog/apple-silicon-m1-black-magic/#performance-must-suck-when-trying-to-emulate-x86-on-arm-right
- https://www.reddit.com/r/hardware/comments/i0mido/apple_silicon_has_a_runtime_toggle_for_tso_to/.
And yes, https://github.com/saagarjha/TSOEnabler is open-source software to toggle that support. But it's a kernel extension, and code signing makes it tricky to get MacOS to allow it, and you have to sign it or disable signature verification or something:
Supposedly, you should be able to use this if you build and sign the kernel extension (disabling SIP if you aren't using a KEXT signing certificate) and drag it into /Library/Extensions. A dialog should come up to prompt you to enable the extension in the Security & Privacy preferences pane, you allow it from there and restart, and it will be installed. (If you're not seeing it, the permissions on the extension might be wrong: try a chown -R root:wheel.) In practice this can go wrong in many ways, and I have had luck by "resetting everything" and trying to install after doing the following:
[...] see the link for the list of steps
So yes, it's plausible that QEMU's x86 emulation could use the same hardware support that Rosetta-2's x86 emulation does. They're both x86 emulators.
And as you say, the main issue is Apple providing public APIs for enabling the HW mode so people don't have to install this kernel module manually; I'm sure most people wouldn't want to do that. I don't know much about the software situation, I was more interested in the CPU-architecture details.
QUESTION
I'm trying to remake an existing animated line graph I made where each line has a uniquely scaled y-axis - one on the left, one on the right. The graph is comparing the value of two cryptocurrencies that have vastly different sizes (eth/btc), which is why I need multiple scales to actually see changes.
My data has been formatted in a pd df (numbers here are random):
...ANSWER
Answered 2021-Aug-19 at 22:27I re-structured your code in order to easily set up a secondary axis animation.
Here the code of the animation with a single y axis:
QUESTION
I have a Dataflow pipeline that fetches data from Pub/Sub and prepares them for insertion into Big Query and them writes them into the Database.
It works fine, it can generate the schema automatically and it is able to recognise what datatype to use and everything.
However the data we are using with it can vary vastly in format. Ex: we can get both A and B for a single column
...ANSWER
Answered 2021-Aug-10 at 07:19BigQuery isn't a document database, but a columnar oriented database. In addition, you can't update the schema of existing columns (only add or remove them).
For your use case, and because you can't know/predict the most generic schema of each of your field, the safer is to store the raw JSON as a string, and then to use the JSON functions of BigQuery to post process, in SQL, your data
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