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Extract a substring according to a pattern
... sub to replace it with a colon first. For example, if the separator were _ then string <- sub("_", ":", string)
c(read.dcf(textConnection(string)))
## [1] "E001" "E002" "E003"
7) separate
7a) Using tidyr::separate we create a data frame with two columns, one for the part before the colon and o...
How to deep copy a list?
...
E0_copy is not a deep copy. You don't make a deep copy using list() (Both list(...) and testList[:] are shallow copies).
You use copy.deepcopy(...) for deep copying a list.
deepcopy(x, memo=None, _nil=[])
Deep copy operat...
How can I get last characters of a string
...tring method .substr() combined with the .length property.
var id = "ctl03_Tabs1";
var lastFive = id.substr(id.length - 5); // => "Tabs1"
var lastChar = id.substr(id.length - 1); // => "1"
This gets the characters starting at id.length - 5 and, since the second argument for .substr() is omi...
Why is printing to stdout so slow? Can it be sped up?
... I experimented earlier with huge (up to 10MB with fp = os.fdopen(sys.__stdout__.fileno(), 'w', 10000000)) python-side buffers. Impact was nil. ie: still long tty delays. This made me think/realize that you just postpone the slow tty problem... when python's buffer finally flushes the tty st...
Default visibility of class methods in PHP
...sibility.
<?php
class Example {
public $name;
public function __construct() {
$this -> age = 9; // age is now public
$this -> privateFunction();
}
private function privateFunction() {
$this -> country = "USA"; // this is also public
}
}
...
Syntax error on print with Python 3 [duplicate]
...rror. To avoid this, it is a good practice to import print function:
from __future__ import print_function
Now your code works on both 2.x & 3.x.
Check out below examples also to get familiar with print() function.
Old: print "The answer is", 2*2
New: print("The answer is", 2*2)
Old: print...
Differences between “BEGIN RSA PRIVATE KEY” and “BEGIN PRIVATE KEY”
...
Copying the content from the above link for quick reference:
#define PEM_STRING_X509_OLD "X509 CERTIFICATE"
#define PEM_STRING_X509 "CERTIFICATE"
#define PEM_STRING_X509_PAIR "CERTIFICATE PAIR"
#define PEM_STRING_X509_TRUSTED "TRUSTED CERTIFICATE"
#define PEM_STRING_X509_REQ_OLD "NEW CERTI...
Difference between “git checkout ” and “git checkout -- ”
...ould normally discard uncommitted changes
# to the _file_ "README"
git checkout master # would normally switch the working copy to
# the _branch_ "master"
git checkout -- master # discard uncommitted changes to the _file_ "master"
and option/f...
How can I change UIButton title color?
...
With Swift 5, UIButton has a setTitleColor(_:for:) method. setTitleColor(_:for:) has the following declaration:
Sets the color of the title to use for the specified state.
func setTitleColor(_ color: UIColor?, for state: UIControlState)
The following Playgro...
A Java API to generate Java source files [closed]
...del/codemodel/2.6/…, it is CDDL + GPL glassfish.java.net/public/CDDL+GPL_1_1.html
– ykaganovich
Apr 18 '14 at 19:02
...