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Setting up foreign keys in phpMyAdmin?
...ting up a database using phpMyAdmin. I have two tables ( foo and bar ), indexed on their primary keys . I am trying to create a relational table ( foo_bar ) between them, using their primary keys as foreign keys.
...
How can I SELECT rows with MAX(Column value), DISTINCT by another column in SQL?
... the first one is much much slower than La Voie's version when there is no index on the matched column (i.e. "home"). (Tested with 24k rows resulting in 13k rows)
– Thomas Tempelmann
Apr 30 '15 at 10:29
...
jQuery validate: How to add a rule for regular expression validation?
..."form">
<form id="LOGIN" name="LOGIN" method="post" action="/index/secure/authentication?action=login">
<h1>Log In</h1>
<div id="LOGIN_EMAIL">
<label for="EMAIL">Email Address</label>
<input id=...
How to use ng-repeat without an html element
... In my case, I did need to add a separator for each element where the index != 0 and ng-repeat-start, ng-repeat-end break my design, so the solution was to create an extra variable adding this separator object before each element and iterate the new var: <div class="c477_group"> <div...
Javascript: formatting a rounded number to N decimals
...9999998.toFixed(4) correctly returns 1.0245.
– Matt Ball
Mar 13 '12 at 14:40
3
@MarkTomlin: Then ...
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar
... NSString *savedSearchTerm_;
NSInteger savedScopeButtonIndex_;
BOOL searchWasActive_;
}
@property (nonatomic, retain) NSManagedObjectContext *managedObjectContext;
@property (nonatomic, retain, readonly) NSFetchedResultsController *fetchedResultsController;
@prope...
select、poll、epoll之间的区别总结[整理] - C/C++ - 清泛网 - 专注C/C++及内核技术
...le/details/6568969
http://www.ibm.com/developerworks/cn/linux/l-cn-edntwk/index.html?ca=drs-
http://linux.chinaunix.net/techdoc/net/2009/05/03/1109887.shtml
3、epoll
epoll既然是对select和poll的改进，就应该能避免上述的三个缺点。那epoll都是怎么解决的呢？在此之...
Array slicing in Ruby: explanation for illogical behaviour (taken from Rubykoans.com)
...
Slicing and indexing are two different operations, and inferring the behaviour of one from the other is where your problem lies.
The first argument in slice identifies not the element but the places between elements, defining spans (and...
How to check whether a pandas DataFrame is empty?
...
I use the len function. It's much faster than empty. len(df.index) is even faster.
import pandas as pd
import numpy as np
df = pd.DataFrame(np.random.randn(10000, 4), columns=list('ABCD'))
def empty(df):
return df.empty
def lenz(df):
return len(df) == 0
def lenzi(df):
...
Replace all spaces in a string with '+' [duplicate]
...ll(Source, stringToFind, stringToReplace) {
var temp = Source;
var index = temp.indexOf(stringToFind);
while (index != -1) {
temp = temp.replace(stringToFind, stringToReplace);
index = temp.indexOf(stringToFind);
}
return temp;
}
String.prototype.ReplaceAll = f...