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What happens to a declared, uninitialized variable in C? Does it have a value?
...
400536: 55 push %rbp
400537: 48 89 e5 mov %rsp,%rbp
40053a: 48 83 ec 10 sub $0x10,%rsp
40053e: 8b 45 fc mov -0x4(%rbp),%eax
400541: 89 c6 mov %eax,%esi
400543: ...
从估值5千万到一无所有 90后的他感觉梦境一场 - 资讯 - 清泛网 - 专注C/C++...
...到线下的商户。而他放弃了O2O做法，现在做的模式不像B2B、也不是C2C，“可能有C2B的概念”。他发现宠物生意，首先需要解决的是入口的问题。
根据夏军透露，我国宠物规模交易达到6000多万只，其中50%以上都在到家后的一个星...
How to split a string with any whitespace chars as delimiters
...x101.com/r/dT7wG9/1 or http://rick.measham.id.au/paste/explain.pl?regex=\s%2B or http://regexper.com/#^s%2B or http://www.myezapp.com/apps/dev/regexp/show.ws?regex=\s+&env=env_java
– VonC
Jan 23 '16 at 5:59
...
How do I combine a background-image and CSS3 gradient on the same element?
...
Multiple backgrounds!
body {
background: #eb01a5;
background-image: url("IMAGE_URL"); /* fallback */
background-image: url("IMAGE_URL"), linear-gradient(#eb01a5, #d13531); /* W3C */
}
These 2 lines are the fallback for any browser that doesn't do gradients....
DirectX SDK (June 2010) Installation Problems: Error Code S1023
...strator rights:
MsiExec.exe /passive /X{F0C3E5D1-1ADE-321E-8167-68EF0DE699A5}
MsiExec.exe /passive /X{1D8E6291-B0D5-35EC-8441-6616F567A0F7}
Install the DirectX SDK (June 2010)
Reinstall the Visual C++ 2010 Redistributable Package version 10.0.40219 (Service Pack 1). On an x64 system, you should in...
How do you delete a column by name in data.table?
...lumns matching a regex
df3[, grep("^foo$", colnames(df3)):=NULL]
# Method 2b -- An alternative to 2a, also "safe" in the sense described below
df3[, which(grepl("^foo$", colnames(df3))):=NULL]
data.table also supports the following syntax:
## Method 3 (could then assign to df3,
df3[, !"foo"]
...
Should CSS always preceed Javascript?
...ebKit 525) (100%)
IE 8 (75%)
Firefox 3.5 (96%)
Safari 4 (99%)
Opera 11.60 (85%)
In total, roughly 85% of desktop browsers in use today support speculative loading. Putting scripts before CSS will have a performance penalty on 15% of users globally; YMMV based on your site's specific audience. (A...
How to extract numbers from a string in Python?
...xpected output>), ...]
ss = [("apple-12.34 ba33na fanc-14.23e-2yapple+45e5+67.56E+3",
['-12.34', '33', '-14.23e-2', '+45e5', '+67.56E+3']),
('hello X42 I\'m a Y-32.35 string Z30',
['42', '-32.35', '30']),
('he33llo 42 I\'m a 32 string -30',
['33', '42', '32', '-3...
Remote connect to clearDB heroku database
...se URL. e.g this is your cleardb database URL.
'mysql://b0600ea495asds:9cd2b111@us-cdbr-hirone-west-
06.cleardb.net/heroku_4a1dc3673c4114d?reconnect=true'
Than this will be your database credentials. (Extracted from Above URL)
USER NAME = b0600ea495asds
PASSWORD = 9cd2b111
HOST = us-cdbr-hir...
Clojure: reduce vs. apply
...)))
"Elapsed time: 1.409 msecs"
49995000
user=> (time (reduce + (range 1e5)))
"Elapsed time: 17.524 msecs"
4999950000
user=> (time (apply + (range 1e5)))
"Elapsed time: 11.548 msecs"
4999950000
Looking at source code of clojure reduce its pretty clean recursion with internal-reduce, didn't f...