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Using 'return' in a Ruby block
...value = block.call
irb(main):003:1> puts "value=#{value}"
irb(main):004:1> end
=> nil
irb(main):005:0>
irb(main):006:0* thing {
irb(main):007:1* return 6 * 7
irb(main):008:1> }
LocalJumpError: unexpected return
from (irb):7:in `block in irb_binding'
from (irb):2:in...
TCP 的那些事儿（上） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...）
很多人会问，为什么建链接要3次握手，断链接需要4次挥手？
对于建链接的3次握手，主要是要初始化Sequence Number 的初始值。通信的双方要互相通知对方自己的初始化的Sequence Number（缩写为ISN：Inital Sequence Number）——所...
fastest MD5 Implementation in JavaScript
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edited Jul 30 '18 at 14:00
akmozo
9,57133 gold badges2323 silver badges3838 bronze badges
answered O...
Get class that defined method
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edited Jun 20 '14 at 19:44
Aaron Hall♦
260k6969 gold badges353353 silver badges303303 bronze badges
...
Why are Python lambdas useful? [closed]
...ions to do stuff. Example:
mult3 = filter(lambda x: x % 3 == 0, [1, 2, 3, 4, 5, 6, 7, 8, 9])
sets mult3 to [3, 6, 9], those elements of the original list that are multiples of 3. This is shorter (and, one could argue, clearer) than
def filterfunc(x):
return x % 3 == 0
mult3 = filter(filterfu...
What encoding/code page is cmd.exe using?
...utput in the default codepage? Total garbage!
Z:\andrew\projects\sx\1259084>chcp
Active code page: 850
Z:\andrew\projects\sx\1259084>java Foo
== UTF-8
= no bom
ASCII abcde xyz
German ├ñ├Â├╝ ├ä├û├£ ├ƒ
Polish ąęźżńł
Russian ð░ð▒...
How to drop rows of Pandas DataFrame whose value in a certain column is NaN
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edited Feb 16 at 7:46
AMC
2,22966 gold badges1010 silver badges2828 bronze badges
answered Nov 16...
How do I split a string, breaking at a particular character?
...s String.prototype.split function:
var input = 'john smith~123 Street~Apt 4~New York~NY~12345';
var fields = input.split('~');
var name = fields[0];
var street = fields[1];
// etc.
share
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impro...
PHP DOMDocument errors/warnings on html5-tags
... rap-2-h
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answered May 22 '11 at 20:56
lonesomedaylonesomeday
207k454...