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Select random row from a sqlite table
...s solution, since it allows me to search for n lines. In my case, I needed 100 random samples from the database - ORDER BY RANDOM() combined with LIMIT 100 does exactly that.
– mnr
Aug 29 '18 at 0:03
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How do I print to the debug output window in a Win32 app?
...io is not running (or even installed) on the box
– pm100
Oct 15 '10 at 0:23
4
@CDT: It depends on...
Is there a simple way to convert C++ enum to string?
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@ikku100 you are incorrect about #define X(a, b) #b. This is only necessary if the definition looks like this X(Red, red), rather than the definition shown in the answer, X(Red, "red")
– learnvst
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How do you add a Dictionary of items into another Dictionary
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100
In Swift 4, one should use merging(_:uniquingKeysWith:):
Example:
let dictA = ["x" : 1, "y...
How to implement a binary tree?
... testTree.addNode(testTree.root, 300)
testTree.addNode(testTree.root, 100)
testTree.addNode(testTree.root, 30)
testTree.printInorder(testTree.root)
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How do I do an OR filter in a Django query?
...ow.com/questions/5988665/pipe-character-in-python
– e100
Mar 26 '15 at 18:06
add a comment
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Summarizing multiple columns with dplyr? [duplicate]
...library(purrrlyr)
library(data.table)
library(bench)
set.seed(123)
n <- 10000
df <- data.frame(
a = sample(1:5, n, replace = TRUE),
b = sample(1:5, n, replace = TRUE),
c = sample(1:5, n, replace = TRUE),
d = sample(1:5, n, replace = TRUE),
grp = sample(1:3, n, replace = TRUE)
)
d...
Access to private inherited fields via reflection in Java
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"As of the Java 2 platform v1.2, this class has been retrofitted to implement List, so that it becomes a part of Java's collection framework." retrofitted in 1.2? if that's not old then what is? Source: download.oracle.com/javase/1.4.2/docs/api/java/ut...
Check if a Windows service exists and delete in PowerShell
...ause it doesn't throw an error. I was very wrong. Running each in a loop 100 times, Get-Service took 0.16 seconds while Get-WmiObject took 9.66 seconds. So Get-Service is 60x faster than Get-WmiObject.
– Simon Tewsi
Mar 27 '17 at 2:01
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HashSet versus Dictionary w.r.t searching time to find if an item exists
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HashSet vs List vs Dictionary performance test, taken from here.
Add 1000000 objects (without checking duplicates)
Contains check for half the objects of a collection of 10000
Remove half the objects of a collection of 10000
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