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In minecraft, how do I construct a 4-bit comparator?

4-bit comparators are a basic building block in electronics, and useful in many redstone devices, in particular computers. I’m interested in a good overview of the construction this type of device. It takes eight signals as input: a0, a1, a2, a3, b0, b1, b2, b3; and outputs 2 signals: a<b, a=b with a>b = !(a<b). […]

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Ask Games Video Games

In minecraft, how do I construct a 4-bit comparator?

4-bit comparators are a basic building block in electronics, and useful in many redstone devices, in particular computers. I’m interested in a good overview of the construction this type of device. It takes eight signals as input: a0, a1, a2, a3, b0, b1, b2, b3; and outputs 2 signals: a<b, a=b with a>b = !(a<b). […]

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Mastering Development

pandas merge as of on one column, exactly on other columns?

I am trying to merge 2 dataframes, with exact matching on some columns and as_of matching on some other column (typically a date). The intention is very well described in this post (I’ll copy paste the main content below): Pandas: Approximate join on one column, exact match on other columns The post above was answered […]

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Mastering Development

importing csv file with custom delimiter in mysql

I’m doing mysql in my terminal as well as in my cmd. I have a table : mysql> create table stu (sno int, name char(10)); It’s CSV file (b.csv): sno, name 1,a 2,b 3,"c,d" I imported that in mysql : mysql> load data local infile ‘b.csv’ into table stu fields terminated by ‘,’ enclosed by […]

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Ask Games Video Games

In minecraft, how do I construct a 4-bit comparator?

4-bit comparators are a basic building block in electronics, and useful in many redstone devices, in particular computers. I’m interested in a good overview of the construction this type of device. It takes eight signals as input: a0, a1, a2, a3, b0, b1, b2, b3; and outputs 2 signals: a<b, a=b with a>b = !(a<b). […]

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User Help

OneDrive Screw Up (How to Repair)

Long, weird, story. We ordered a laptop. It has a short: shocks us, completely crashes, and reboots. We’re sending it back. We ordered an AIO as a replacement. Works fine. Wife had stuff on the laptop. She hand moved most of it to the AIO. OneDrive synced everything it had from the problem laptop to […]

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Mastering Development

Fast way to remove array of specific row values from 2D numpy array

I have a 2D array like this: a = np.array([[25, 83, 18, 71], [75, 7, 0, 85], [25, 83, 18, 71], [25, 83, 18, 71], [75, 48, 8, 43], [ 7, 47, 96, 94], [ 7, 47, 96, 94], [56, 75, 50, 0], [19, 49, 92, 57], [52, 93, 58, 9]]) and I want to […]

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Mastering Development

Grouping Nodes by hardcoding node values in XSLT

<root> <Entry> <ID>1</ID> <Details> <Code>A1</Code> <Value>1000</Value> </Details> </Entry> <Entry> <ID>2</ID> <Details> <Code>A2</Code> <Value>2000</Value> </Details> </Entry> <Entry> <ID>3</ID> <Details> <Code>B1</Code> <Value>3000</Value> </Details> </Entry> <Entry> <ID>4</ID> <Details> <Code>B2</Code> <Value>4000</Value> </Details> </Entry> </root> I have this input XML which I am looking to group via XSLT wherein the grouping happens by hardcoding node values. Let me explain that […]

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Mastering Development

python datatable, string manipulation on column

from datatable import dt, f, g, by, update, join, sort tt = dt.Frame({‘a’ : [‘A1′,’A2′,’A3’], ‘b’:[100,200,300]}) print(tt) | a b — + — — 0 | A1 100 1 | A2 200 2 | A3 300 [3 rows x 2 columns] How can I remove the ‘A’ in the a column and assign it to […]

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Mastering Development

How to replicate excel’s solver in python? [closed]

I am currently developing an investment strategy in python that consists in choosing the weights of the portfolio’s assets based on the maximization of the mean utility, calculated from a sample of simulated utilities. Plase take this small example: #Function to define portfolio returns def pret(weights,rets): return np.sum(weights*(rets)) #Function to define Utility def utility(weights,rets): return […]