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Rails: How do I create a default value for attributes in Rails activerecord's model? [duplicate]
...ter_initialize couldn't easily be moved to before_validation, before_save, etc. Chances are that eventually one of the devs on your team will execute something like MyModel.all.each perhaps for bulk processing of some kind, and thus run this initialization logic MyModel.count num of times.
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How to use filter, map, and reduce in Python 3
...f noiters(*funcs):
if not funcs:
funcs = [map, filter, zip] # etc
from functools import reduce
globals()[reduce.__name__] = reduce
for func in funcs:
globals()[func.__name__] = lambda *ar, func = func, **kwar: list(func(*ar, **kwar))
try:
yield
finall...
How to get file size in Java [duplicate]
I used this code to instantiate a File object:
3 Answers
3
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Append file contents to the bottom of existing file in Bash [duplicate]
...config. I thought about using sed to insert the contents of the api text file to the bottom of the config.inc file. I've started the script but it doesn't work and it wipes the file.
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wget command to download a file and save as a different filename
I am downloading a file using the wget command. But when it downloads to my local machine, I want it to be saved as a different filename.
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c++文件流基本用法(ifstream, ostream,fstream) - C/C++ - 清泛网 - 专注C/C++及内核技术
...。
例一: 写文件
#include <fstream.h>
void main
{
ofstream file;
file.open("file.txt");
file<<"Hello file/n"<<75;
file.close();
}
例二: 读文件
#include <fstream.h>
void main
{
ifstream file;
char output[100];
int x;
file.open("file.txt");
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php 遍历目录批量转换文件编码 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...：
< ?php
//php iconv.php
//exec it on root dir
$path = dirname(__FILE__);
tree($path);
function encodeFiles($fileName)
{
// echo $fileName;
if (file_exists($fileName)) {
// Read in the contents
$res = file_get_contents($fileName);
$i = pathinfo($file...
Cannot set some HTTP headers when using System.Net.WebRequest
...et the property to the right value. ContentLength, ContentType, UserAgent, etc, all need to be set this way.
IMHO, this is a shortcoming on MS part...setting the headers via Headers.Add() should automatically call the appropriate property behind the scenes, if that's what they want to do.
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Stash just a single file
I'd like to be able to stash just the changes from a single file:
5 Answers
5
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Restore file from old commit in git
... an old commit that I did a few weeks ago. I want to restore only a single file from that commit. What do I do?
4 Answers
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