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How can I filter lines on load in Pandas read_csv function?
...about memory running out, then use an iterator and apply the filter as you concatenate chunks of your file e.g.:
import pandas as pd
iter_csv = pd.read_csv('file.csv', iterator=True, chunksize=1000)
df = pd.concat([chunk[chunk['field'] > constant] for chunk in iter_csv])
You can vary the chunk...
how do i remove a comma off the end of a string?
...sponding ltrim for left trim) is very useful as you can specify a range of characters to remove, i.e. to remove commas and trailing whitespace you would write:
$string = rtrim($string, ", \t\n");
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How to initialize array to 0 in C?
...tatic variables are automatically initialized to zero. If you have simply
char ZEROARRAY[1024];
at global scope it will be all zeros at runtime. But actually there is a shorthand syntax if you had a local array. If an array is partially initialized, elements that are not initialized receive the v...
Remove leading or trailing spaces in an entire column of data
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My guess is there are other characters then "spaces" in what you're trying to remove. You could try =TRIM(CLEAN(B1)) which will remove all non-printable characters and any leading/trailing spaces.
– hydrox467
Mar 6...
How do I add a newline to a TextView in Android?
... my own resulting in the following solution for rendering line feed escape chars:
string = string.replace("\\\n", System.getProperty("line.separator"));
Using the replace method you need to filter escaped linefeeds (e.g. '\\\n')
Only then each instance of line feed '\n' escape chars gets rendere...
std::string的截取字符串的方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ndex).c_str();
//port
ip.substr(index + 1).c_str();
int find_first_of(char c, int start = 0):
查找字符串中第1个出现的c,由位置start开始。 如果有匹配，则返回匹配位置；否则，返回-1.默认情况下，start为0，函数搜索整个字符串。
int find...
Is it possible to dynamically compile and execute C# code fragments?
...bly. The analogy: I can create an HTML page using the DOM, or using string concats.
– Cheeso
May 14 '09 at 21:49
here'...
Removing first x characters from string?
How might one remove the first x characters from a string? For example, if one had a string lipsum , how would they remove the first 3 characters and get a result of sum ?
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How many bits or bytes are there in a character? [closed]
How many bits or bytes are there per "character"?
2 Answers
2
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Discuz! X3 论坛标题字数突破80的限制 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...分来修改：
一、修改数据库subject字段的长度，默认都是char(80)；
二、修改JS验证字符数文件；
三、修改模板中写死的字符限制数；
四，修改函数验证文件；
五，修改语言包文件。
修改的文件一览如下（数据库修改 _forum_po...