大约有 1,400 项符合查询结果（耗时：0.0125秒） [XML]
浅析为什么char类型的范围是 -128~+127 - C/C++ - 清泛网 - 专注C/C++及内核技术
...255,所以 unsigned char 的范围为0~ 255，在这里普及一下2进制转十进制的方法， 二进制每一位的数值乘以它的位权(2^(n-1),n为自右向左的位),再相加，可得到十进制数，比如 ：
1111 1111 =1*2^7+1*2^6+1*2^5+1*2^4+1*2^3+1*2^2+1*2^1+1*2^0=127 。
但...
On Duplicate Key Update same as insert
... wont this would slow the process on large datasets and like importing csv's with 100K or more rows?
– Muhammad Omer Aslam
May 14 at 17:45
add a comment
...
融资千万美元后的足记要如何应对“爆款后遗症”？ - 资讯 - 清泛网 - 专注C...
...露，光源资本是足记一直以来的财务顾问，此次是用佣金转股的方式进入的。
“这个投资本来今年三月底就已经敲定了。但由于我们引入的是美元基金，手续比较长，比如建设海外VIE架构等，到公布前一周才完成大体的手续。...
rsync copy over only certain types of files using include option
...d on: https://stackoverflow.com/a/11111793/588867
# Example: selrsync 'tsv,csv' ./source ./target --dry-run
types="$1"; shift; #accepts comma separated list of types. Must be the first argument.
includes=$(echo $types| awk -F',' \
'BEGIN{OFS=" ";}
{
for (i = 1; i <= NF; i++ ) { if (l...
半年报披露 天涯社区被资本方看空 - 资讯 - 清泛网 - 专注C/C++及内核技术
...015年半年度报告，自2015年9月1日起按照有关规定暂停股票转让。但9月1日，天涯社区就披露了半年报告。这家受到高度关注的老牌互联网企业，在资本市场上，似乎还有很长的路要走。几乎没有一家公司像天涯社区一样得到如此...
BLE（四）嗅探工具 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...进而确定“访问地址”、“循环冗余校验”初始值、“跳转间隔”、“跳转增量”等，并还原出数据包的值
缺点：
说是支持“传统蓝牙”，但其实只能捕获“基本速率蓝牙”在网络中的活动，并不支持后来的“增强速率蓝牙...
【软著】软件著作权证书申请流程及注意事项，模板分享 - App Inventor 2 中...
...升公司或个人的品牌形象，也可以作为公司无形资产进行转让、许可或融资。申报政府项目：一些政府项目、科研项目或资金申请可能要求有软件著作权，获得软著可以提高申请成功的几率。招聘及融资：在人才招聘和融资过程...
How to deal with SettingWithCopyWarning in Pandas?
...ig file with lots of columns, then modifying it to be smaller.
The pd.read_csv function can help you out with a lot of this and also make the loading of the file a lot faster.
So instead of doing this
quote_df = pd.read_csv(StringIO(str_of_all), sep=',', names=list('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefg...
How can I remove the first line of a text file using bash/sed script?
...ink the OP is trying to achieve what made me find this question. I have 10 CSV files with 500k lines in each. Every file has the same header row as the first line. I am cat:ing these files into one file and then importing them into a DB letting the DB create column names from the first line. Obvious...
Read file data without saving it in Flask
...
I was trying to do the exact same thing, open a text file (a CSV for Pandas actually). Don't want to make a copy of it, just want to open it. The form-WTF has a nice file browser, but then it opens the file and makes a temporary file, which it presents as a memory stream. With a lit...