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How to split a string, but also keep the delimiters?
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// "[Array][Index][Out][Of][Bounds][Exception]"
dump("1234567890".split("(?<=\\G.{4})"));
// "[1234][5678][90]"
// Split at the end of each run of letter
dump("Boooyaaaah! Yippieeee!!".split("(?<=(?=(.)\\1(?!\\1))..)"));
// "[Booo][yaaaa][h!...
Uses of content-disposition in an HTTP response header
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Well, RFC 5678 here, RFC 9876 there. If Content-Disposition is frowned upon, what should we use instead?
– Csaba Toth
Mar 20 '16 at 18:46
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Is there XNOR (Logical biconditional) operator in C#?
...his doesn't generalize to bitwise operations, where you want 0x1234 XNOR 0x5678 == 0xFFFFBBB3 (assuming 32 bits). For that, you need to build up from other operations, like ~(A^B). (Note: ~, not !.)
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Explicitly select items from a list or tuple
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list( myBigList[i] for i in [87, 342, 217, 998, 500] )
I compared the answers with python 2.5.2:
19.7 usec: [ myBigList[i] for i in [87, 342, 217, 998, 500] ]
20.6 usec: map(myBigList.__getitem__, (87, 342, 217, 998, 500))
22.7 usec: itemgetter(87,...
Mean per group in a data.frame [duplicate]
... 19 45
Ben 1 53 19
Ben 2 22 87
Ben 3 19 45
Cat 1 22 87
Cat 2 67 43
Cat 3 45 32', header=TRUE)
aggregate(d[, 3:4], list(d$Name), mean)
Group.1 Rate1 Rate2
1 Aira 16....
二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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数据
对每个块的纠错码
1
1
67 85 70 134 87 38 85 194 119 50 6 18 6 103 38
213 199 11 45 115 247 241 223 229 248 154 117 154 111 86 161 111 39
2
246 246 66 7 118 134 242 7 38 86 22 198 199 146 6
87 204 96 60 202 182 124 157 200 134 27 129 209 17 163 163...
Format floats with standard json module
...o, '.2f')
print(json.dumps(23.67))
print(json.dumps([23.67, 23.97, 23.87]))
emits:
23.67
[23.67, 23.97, 23.87]
as you desire. Obviously, there should be an architected way to override FLOAT_REPR so that EVERY representation of a float is under your control if you wish it to be; but unfortunat...
Why should Java ThreadLocal variables be static
...mmonPool-worker-3->81->81
Start-ForkJoinPool.commonPool-worker-1->87->87
End-main->62->62
End-ForkJoinPool.commonPool-worker-1->87->87
End-ForkJoinPool.commonPool-worker-2->31->31
End-ForkJoinPool.commonPool-worker-3->81->81
Start-ForkJoinPool.commonPool-worker-2-...
How to add reference to System.Web.Optimization for MVC-3-converted-to-4 app
...edited Sep 4 '15 at 14:03
TylerD87
1,4881010 silver badges2020 bronze badges
answered May 7 '14 at 9:13
Myzife...
Python base64 data decode
...00\x00\x00C\x96\x08\xb2\x00\x00\x00\x00C\x96\x86\xf9\x00\x00\x00\x00C\x96\x87\x0b\x00\x00\x00\x00C\x96\x87\x1d\x00\x00\x00\x00C\x96\x87/\x00\x00\x00\x00C\x96\x87AA\x0b\xe7PC\x96\x87SCI\xf5gC\x96\x87eC\xd4J\xeaC\x96\x87wD\r\x17EC\x96\x87\x89D\x00F6C\x96\x87\x9bC\x9cg\xdeC\x96\x87\xadB\xd56\x0cC\x96\x...