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Objective-C: Where to remove observer for NSNotification?
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@MobileMon The article you linked to seems to make my point. What am I missing ?
– Dirk
Jun 27 '13 at 22:58
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What is a good Hash Function?
... is a good Hash function? I saw a lot of hash function and applications in my data structures courses in college, but I mostly got that it's pretty hard to make a good hash function. As a rule of thumb to avoid collisions my professor said that:
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Sort JavaScript object by key
...s, you can sort the keys and then retrieve the associated values:
var myObj = {
'b': 'asdsadfd',
'c': 'masdasaf',
'a': 'dsfdsfsdf'
},
keys = [],
k, i, len;
for (k in myObj) {
if (myObj.hasOwnProperty(k)) {
keys.push(k);
}
}
keys.sort();
len = keys.le...
Fastest way to count exact number of rows in a very large table?
...:
SQL Server example (1.4 billion rows, 12 columns)
SELECT COUNT(*) FROM MyBigtable WITH (NOLOCK)
-- NOLOCK here is for me only to let me test for this answer: no more, no less
1 runs, 5:46 minutes, count = 1,401,659,700
--Note, sp_spaceused uses this DMV
SELECT
Total_Rows= SUM(st.row_count)...
Very simple log4j2 XML configuration file using Console and File appender
...logger{36} - %msg%n" />
</Console>
<File name="MyFile" fileName="all.log" immediateFlush="false" append="false">
<PatternLayout pattern="%d{yyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
</File>
</Appenders>
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Do you use source control for your database items? [closed]
I feel that my shop has a hole because we don't have a solid process in place for versioning our database schema changes. We do a lot of backups so we're more or less covered, but it's bad practice to rely on your last line of defense in this way.
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How to duplicate sys.stdout to a log file?
...on, or I'm doing something so non-standard that nobody knows - I'll revise my question to also ask: What is the best way to accomplish logging when a python app is making a lot of system calls?
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Implementing INotifyPropertyChanged - does a better way exist?
...n improvement to use a lambda expression instead of the property name, see my answer
– Thomas Levesque
Aug 22 '09 at 17:50
9
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moving committed (but not pushed) changes to a new branch after pull
...nto its own branch rather than into master . These commits only exist on my local machine and have not been pushed to origin , but the situation is complicated somewhat in that other devs have been pushing to origin/master and I've pulled those changes.
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Efficient way to remove ALL whitespace from String?
...s the first option (without regexp) runs in less then a second (700 ms on my machine), and the second takes 3.5 seconds.
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