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Plot two histograms on single chart with matplotlib
...ues returned by hist:
import numpy as np
import matplotlib.pyplot as plt
foo = np.random.normal(loc=1, size=100) # a normal distribution
bar = np.random.normal(loc=-1, size=10000) # a normal distribution
_, bins, _ = plt.hist(foo, bins=50, range=[-6, 6], normed=True)
_ = plt.hist(bar, bins=bins, ...
Strings are objects in Java, so why don't we use 'new' to create them?
... reference will point to the canonical String instance.
String a = "foo";
String b = "foo";
System.out.println(a == b); // true
String c = new String(a
What's the difference between isset() and array_key_exists()? [duplicate]
...
@Zacky Japanese. And it just says 'foobar'.
– deceze♦
Jul 9 '10 at 12:03
18
...
Unix shell script find out which directory the script file resides?
...sh, ksh:
#!/bin/bash
# Absolute path to this script, e.g. /home/user/bin/foo.sh
SCRIPT=$(readlink -f "$0")
# Absolute path this script is in, thus /home/user/bin
SCRIPTPATH=$(dirname "$SCRIPT")
echo $SCRIPTPATH
For tcsh, csh:
#!/bin/tcsh
# Absolute path to this script, e.g. /home/user/bin/foo.c...
What is the difference between JOIN and UNION?
...example of JOIN:
mysql> SELECT * FROM
-> (SELECT 23 AS bah) AS foo
-> JOIN
-> (SELECT 45 AS bah) AS bar
-> ON (33=33);
+-----+-----+
| foo | bar |
+-----+-----+
| 23 | 45 |
+-----+-----+
1 row in set (0.01 sec)
...
Convert string to title case with JavaScript
...s my version, IMO it's easy to understand and elegant too.
var str = "foo bar baz"
console.log(
str.split(' ')
.map(w => w[0].toUpperCase() + w.substr(1).toLowerCase())
.join(' ')
)
// returns "Foo Bar Baz"
...
Are there strongly-typed collections in Objective-C?
...s in your generic ObjC class. If you specify constraints, e.g. MyClass <Foo: id<Bar>>, your Swift code will assume values are the type of your constraint, which gives you something to work with. However, specialized subclasses of MyClass would have their specialized types ignored (be se...
How to change identity column values programmatically?
... PRIMARY KEY,
X VARCHAR(10)
)
INSERT INTO Test
OUTPUT INSERTED.*
SELECT 'Foo' UNION ALL
SELECT 'Bar' UNION ALL
SELECT 'Baz'
Then you can do
/*Define table with same structure but no IDENTITY*/
CREATE TABLE Temp
(
ID INT PRIMARY KEY,
X VARCHAR(10)
)
/*Switch table metadata to new structure*/
AL...
Setting Curl's Timeout in PHP
...elf causing a 10-second delay so you can test timeouts:
if (!isset($_GET['foo'])) {
// Client
$ch = curl_init('http://localhost/test/test_timeout.php?foo=bar');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_NOSIGNAL, 1);
curl_setopt($ch, CURLOPT_TIMEOU...
Bash command to sum a column of numbers [duplicate]
...olumn 2 indexed from zero): perl -nle '$s += (split)[2]; END { print $s }' foo.txt or using pipes: cat foo.txt | perl -nle '$s += (split)[2]; END { print $s }'.
– Ben
May 14 '14 at 13:17
...