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Linux Mastering Development

Replace specific character matches in all rows, using the first line as a reference

H, I want to replace specific character matches (.) in all rows, using the first line as a reference My attempt at re-hashing an answer I got to a different question: awk -F’|’ ‘BEGIN{OFS=FS} NR==1 {for(i=1;i<=NF;i++) a[$i] } NR>1 {for(i in a) if( $i == “\.” ) $i=”a”}1’ …the idea of the re-work I tried […]

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Bitcoin Cryptocurrency Mastering Development

How to construct and redeem a bip199 htlc with python-bitcoinlib

Playing with this script, I’d like to understand how to construct a bip199 htlc and redeem it, however this script fails on the OP_EQUALVERIFY and I can’t seem to understand why. import bitcoin import bitcoin.rpc from bitcoin import SelectParams from bitcoin.core import b2x, lx, b2lx, COIN, COutPoint, CMutableTxOut, CMutableTxIn, CMutableTransaction, Hash160 from bitcoin.core.script import CScript, […]

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Mastering Development

Black image output only when using Flask

I have a main app.py script that calls the neuralStyleProcess.py script but it always outputs a completely black image. I’ve tested the neuralStyleProcess.py script by itself and it works fine. The problem only arises when I’m running on development server (when using app.py to call neuralStyleProcess.py). Here’s my codes: For app.py: # Import required packages: […]

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Ask Mathematics

Find the minimizer $u$ of a functional whose derivate contains both $u$ and the sign of $u$

Let $N,h,\gamma,\bar x$ be constants and $x_i\in[-1,1],\forall i=\overline{1,N}$. Consider the following problem $$ \min_u J(u^n) \quad\text{subject to}\quad x_i^{n+1} = x_i^n+hu^n $$ where $$ J(u^n) = \frac{1}{2N}\sum_{i=1}^N |x_i^{n+1}-\bar x|^2+h\gamma|u^n| $$ Consider the problem on a single time interval $[t^n,t^{n+1}]$ and plug the expression for $x_i^{n+1}$ inside $J$ $$ J(u^n) = \frac{1}{2N}\sum_i|x_i^n+hu^n-\bar x|^2+h\gamma|u^n| $$ Derive wrt $u$ […]

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Ask Mathematics

How to find the minimizer u of a functional whose derivate contains both u and the sign of u?

Let $N,h,\gamma,\bar x$ be constants and $x_i\in[-1,1],\forall i=\overline{1,N}$. Consider the following problem $$ \min_u J(u^n) \quad\text{subject to}\quad x_i^{n+1} = x_i^n+hu^n $$ where $$ J(u^n) = \frac{1}{2N}\sum_{i=1}^N |x_i^{n+1}(u)-\bar x|^2+h\gamma|u^n| $$ Consider the problem on a single time interval $[t^n,t^{n+1}]$ and plug the expression for $x_i^{n+1}$ inside $J$ $$ J(u^n) = \frac{1}{2N}\sum_i|x_i^n+hu^n-\bar x|^2+h\gamma|u^n| $$ Derive wrt $u$ […]

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Mastering Development

Inconsistent pool.map behavior

I’m testing a really simple worker pool using python using this code: from multiprocessing import Pool from itertools import cycle def do_stuff(work): core = work[0] inp = work[1] print(‘Running: “{}” “{}”‘.format(core, inp)) def main(): num_cores = 4 jobs = [‘a’, ‘b’, ‘c’, ‘d’, ‘e’, ‘f’, ‘g’, ‘h’] with Pool(num_cores) as pool: work = list(zip(cycle(range(0, num_cores)), […]

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Ask Mathematics

Qustion on the center of universal enveloping algebra

Let $h \subset g$ be reductive algebra and $U(h),U(g)$ their universal enveloping algebra. Let $Z(h)$ and $Z(g)$ be the center of $U(h),U(g)$. I know that $U(h)$ is a subalgebra of $U(g)$. I am wondering whether $Z(h)$ is subalgebra of $Z(g)$. If it is not true in general, is there a sufficient condition to guarantee this? […]

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User Help

Find Non-Matching Values Between Multiple Ranges

I am looking to see if there is a formula only (no VBA) way to find the values in a list of constants that are not in a range; and can be dynamically adjusted for different lengths of lists and with different column counts. Such as: Table 1 is a 3×2, Table 2 is 4×9, […]

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User Help

Find Non-Matching Values Between Multiple Ranges

I am looking to see if there is a formula only (no VBA) way to find the values in a list of constants that are not in a range; and can be dynamically adjusted for different lengths of lists and with different column counts. Such as: Table 1 is a 3×2, Table 2 is 4×9, […]

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Mastering Development

Fortran Error: Rank mismatch in array reference (2/1)

i am looking for your help on this where i kept on getting an error at variables in do loops: Rank mismatch in array reference (2/1). I am new at Fortran and still couldnt completely understand creating two dimensional array and that is where i got the error. I am basically trying to create 2000×25000 […]