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Why do we check up to the square root of a prime number to determine if it is prime?
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n = 12 m = sqrt(12) = 3.46, a = 2, b = 6. n = mm i.e. 12=3.46*3.46 and n = ab i.e 12=2*6. Now condition 3. a < m < b i.e 2 < 3.46 < 6. So to check prime we only need to check for number less than 3.46 which is 2 to fi...
Create a hexadecimal colour based on a string with JavaScript
...d be!
– Florian Bauer
May 28 '16 at 12:22
@haykam Thanks for making it into a snippet!
– Thymine...
Citing the author of a blockquote using Markdown syntax
...which I personally think looks great!
https://gist.github.com/nahtnam/63e3a14acd0f02313ec0
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Convert varchar to uniqueidentifier in SQL Server
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127
DECLARE @uuid VARCHAR(50)
SET @uuid = 'a89b1acd95016ae6b9c8aabb07da2010'
SELECT CAST(
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Best way to serialize an NSData into a hexadeximal string
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answered Jan 31 '12 at 18:18
DaveDave
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How can I create a Set of Sets in Python?
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Python's complaining because the inner set objects are mutable and thus not hashable. The solu...
Update value of a nested dictionary of varying depth
... Alex MartelliAlex Martelli
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PHP: How to generate a random, unique, alphanumeric string for use in a secret link?
...on
$transationID = generate_uuid();
some example outputs will be like:
E302D66D-87E3-4450-8CB6-17531895BF14
22D288BC-7289-442B-BEEA-286777D559F2
51B4DE29-3B71-4FD2-9E6C-071703E1FF31
3777C8C6-9FF5-4C78-AAA2-08A47F555E81
54B91C72-2CF4-4501-A6E9-02A60DCBAE4C
60F75C7C-1AE3-417B-82C8-14D456542CD7
8DE...
How many bytes does one Unicode character take?
...8: E2 9C 9E
UTF-16: 27 1E
U+3020 POSTAL MARK FACE: 〠
Nº: 12320
UTF-8: E3 80 A0
UTF-16: 30 20
U+8089 CJK UNIFIED IDEOGRAPH-8089: 肉
Nº: 32905
UTF-8: E8 82 89
UTF-16: 80 89
U+1F4A9 PILE OF POO: ????
Nº: 128169
UTF-8: F0 9F 92 A9
UTF-16: D8 3D DC A9
U+1F680 ROCKET: ????
Nº: 128640
UTF-...
30岁之后,程序员该向什么方向发展? - 杂谈 - 清泛网 - 专注C/C++及内核技术
...长时间才能接回来,所以一般晚上工作比较有效率。
Q & A3、请问teambition招研发最看重的是哪点?
严清:
最看重学习能力和技术热情度,说白了就是看你能不能成为一个技术牛人。通过你的作品和日常生活来看。
Q & A4、作为...