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How can I rename a database column in a Ruby on Rails migration?
...cord::Migration
def up
add_column :table, :correct_name_column_one, :string
add_column :table, :correct_name_column_two, :string
puts 'Updating correctly named columns'
execute "UPDATE table_name SET correct_name_column_one = old_name_column_one, correct_name_column_two = old_name...
How can I prevent SQL injection in PHP?
...stmt->bind_param('s', $name); // 's' specifies the variable type => 'string'
$stmt->execute();
$result = $stmt->get_result();
while ($row = $result->fetch_assoc()) {
// Do something with $row
}
If you're connecting to a database other than MySQL, there is a driver-specific se...
Dynamically load JS inside JS [duplicate]
...ersion used to create this:
class cScriptLoader {
private m_js_files: string[];
private m_css_files: string[];
private m_head:HTMLHeadElement;
private log = (t:any) =>
{
console.log("ScriptLoader: " + t);
}
constructor(files: string[]) {
this.m_js_f...
What is the best way to give a C# auto-property an initial value?
...st()
{
var db = DefaultValueBool;
var ds = DefaultValueString;
var di = DefaultValueInt;
}
[System.ComponentModel.DefaultValue(true)]
public bool DefaultValueBool { get; set; }
[System.ComponentModel.DefaultValue("Good")]
public string DefaultValueS...
Finding what methods a Python object has
...lp(dir) output on your Python Shell:
dir(...)
dir([object]) -> list of strings
If called without an argument, return the names in the current scope.
Else, return an alphabetized list of names comprising (some of) the attributes of the given object, and of attributes reachable from it.
If the ...
python exception message capturing
...
repr(e) gives you the exception(and the message string); str(e) only gives the message string.
– whitebeard
Jul 30 '16 at 11:28
11
...
How to modify a global variable within a function in bash?
...
Thanks for the point, but I have to return an string array, and within the function I have to add elements to two global string arrays.
– harrison4
May 9 '14 at 13:00
...
How would Git handle a SHA-1 collision on a blob?
...0151210/block-sha1/sha1.c
@@ -246,6 +246,8 @@ void blk_SHA1_Final(unsigned char hashou
blk_SHA1_Update(ctx, padlen, 8);
/* Output hash */
- for (i = 0; i < 5; i++)
- put_be32(hashout + i * 4, ctx->H[i]);
+ for (i = 0; i < 1; i++)
+ put_be32(hashout + i * 4, (ctx->...
How to get the current time in YYYY-MM-DD HH:MI:Sec.Millisecond format in Java?
...sity, what benefit does using SimpleDateFormat bring over just: dateTime.ToString("yyyy-MM-dd HH:mm:ss.SSS") ?
– NickG
May 8 '13 at 9:43
...
Deleting all files in a directory with Python
... list of file names which end it '.bak'. The elements of the list are just strings.
Then you could use os.unlink to remove the files. (PS. os.unlink and os.remove are synonyms for the same function.)
#!/usr/bin/env python
import glob
import os
directory='/path/to/dir'
os.chdir(directory)
files=glo...