换行的字符串 "This string\nhas two lines" 字符串中使用单引号时应该怎么写 'You\'re right, it can\'t be a quote' 把数字变成字符串并保留两位小数 var n = 123456.789 n.toFixed(0); //"123457" n.toFixed(2); //"123456.79" parseFloat(str)str以非数字开头,则返回NaN parseFloat(str)
今天遇到在用CI框架上传csv文件时报错问题: The filetype you are attempting to upload is not allowed. 是类型不允许,想到CI框架的config/mimes.php的配置,发现已经有csv的mimes配置,而且在win7下是可以上传的 于是百度之,半天没结果,果然换google,找到如下的记录: The answer to my problem was with MIME types—I’ll leave this comment up
并行进程怎么使用? import os import sys import time def processFunc(i): time.sleep(10-i) print i if __name__=='__main__': from multiprocessing import Pool pool=Pool() for i in range(0,10): print i print '----------------split line-----------------' for i in r