大约有 38,000 项符合查询结果（耗时：0.0523秒） [XML]
How can I divide two integers to get a double?
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answered Mar 19 '09 at 4:14
NoahDNoahD
7,02244 gold badges2222 silver badges2828 bronze badges
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How to split/partition a dataset into training and test datasets for, e.g., cross validation?
...k of the indices:
import numpy
# x is your dataset
x = numpy.random.rand(100, 5)
numpy.random.shuffle(x)
training, test = x[:80,:], x[80:,:]
or
import numpy
# x is your dataset
x = numpy.random.rand(100, 5)
indices = numpy.random.permutation(x.shape[0])
training_idx, test_idx = indices[:80], ind...
How do different retention policies affect my annotations?
...urce:
The old URL is dead now
hunter_meta and replaced with hunter-meta-2-098036. In case even this goes down, I am uploading the image of the page.
Image (Right Click and Select 'Open Image in New Tab/Window')
share
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String replacement in Objective-C
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edited Mar 20 '09 at 22:45
answered Mar 20 '09 at 22:39
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How does variable assignment work in JavaScript?
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edited Aug 11 '18 at 14:50
Volker E.
5,1821111 gold badges4141 silver badges6262 bronze badges
answered...
MySQL stored procedure vs function, which would I use when?
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105
You can't mix in stored procedures with ordinary SQL, whilst with stored function you can.
e.g...
Repeatedly run a shell command until it fails?
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edited Nov 8 '19 at 0:10
Gurpreet Atwal
7366 bronze badges
answered Oct 19 '12 at 4:09
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Is gcc std::unordered_map implementation slow? If so - why?
...gcc-4.7 is broken (or my installation, which is an installation of gcc-4.7.0 on Ubuntu - and another installation which is gcc 4.7.1 on debian testing).
I will submit a bug report.. until then: DO NOT use std::unordered_map with gcc 4.7!
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Single Line Nested For Loops
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Anthony Geoghegan
9,51244 gold badges4040 silver badges4848 bronze badges
answered Jun 9 '13 at 5:26
Jeff TratnerJeff Tratner
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What is the difference between build.sbt and build.scala?
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To give a brief example, this build.sbt:
name := "hello"
version := "1.0"
is a shorthand notation roughly equivalent to this project/Build.scala:
import sbt._
import Keys._
object Build extends Build {
lazy val root = Project(id = "root", base = file(".")).settings(
name := "hello",
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