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Python read-only property
... answered Sep 27 '16 at 4:31
Oz123Oz123
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Reference: Comparing PHP's print and echo
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echo 125;
ECHO 125
multi-value echo compiles to multiple opcodes
echo 123, 456;
ECHO 123
ECHO 456
Note that multi-value echo doesn't concatenate its arguments, but outputs them one-by-one.
Reference: zend_do_print, zend_do_echo.
Runtime differences
ZEND_PRINT is implemented as follows (ps...
What's the fastest way to merge/join data.frames in R?
...bases as well.
library(plyr)
library(data.table)
library(sqldf)
set.seed(123)
N <- 1e5
d1 <- data.frame(x=sample(N,N), y1=rnorm(N))
d2 <- data.frame(x=sample(N,N), y2=rnorm(N))
g1 <- sample(1:1000, N, replace = TRUE)
g2<- sample(1:1000, N, replace = TRUE)
d <- data.frame(d1, g1,...
Perl build, unit testing, code coverage: A complete working example
...tTestCall3, "false", "argumentTest() IS false test");
# Test argumentTest(123)
my $argumentTestCall4 = HelloPerlBuildWorld::argumentTest(123);
is($argumentTestCall4, "unknown", "argumentTest() IS unknown test");
Now back up in your top level project directory, create a text file named "Build.PL"...
Regex that accepts only numbers (0-9) and NO characters [duplicate]
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In Javascript this is allowing the value 123-456 (\d)*$
– theB3RV
Feb 20 '17 at 15:39
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C# convert int to string with padding zeros?
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Simply
int i=123;
string paddedI = i.ToString("D4");
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How to deal with SettingWithCopyWarning in Pandas?
...1000
Question 21
I am trying to set the value in cell (1, 'D') to 12345. My expected output is
A B C D E
0 5 0 3 3 7
1 9 3 5 12345 4
2 7 6 8 8 1
I have tried different ways of accessing this cell, such as
df['D'][1]. What is the best way to do thi...
What is the meaning and difference between subject, user and principal?
...clarify "User - subset of principal"? If John is the subject and "account #123" is his principal, the user is who? Are there two John's? Since Genus > Species > Individual is increasingly specific, John (user) should be more specific than John (subject). Or am I missing something?
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static const vs #define
...uld be very like to see a comparison table.
– Unknown123
Apr 25 '19 at 3:49
2
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Undo a merge by pull request?
...om.com>
Date: Mon Apr 29 06:12:38 2013 -0700
Merge pull request #123 from john/foo_and_bar
Add foo and bar
commit a507888e9fcc9e08b658c0b25414d1aeb1eef45e
Author: John Doe <john@doe.com>
Date: Mon Apr 29 12:13:29 2013 +0000
Add bar
commit 470ee0f407198057d5cb1d6427bb837...