大约有 30,000 项符合查询结果（耗时：0.0521秒） [XML]
Recommended date format for REST GET API
...rticle. While I agree with the choice of a sortable format if it must be a string at all, a unix timestamp (which the article does not even acknowledge) has every one of the stated benefits and more. Until presentation, the issues of timezones and daylight savings (and political decisions) don't eve...
iPhone - Grand Central Dispatch main thread
...rocessing has finished e.g.
- (void)doCalculation
{
//you can use any string instead "com.mycompany.myqueue"
dispatch_queue_t backgroundQueue = dispatch_queue_create("com.mycompany.myqueue", 0);
dispatch_async(backgroundQueue, ^{
int result = <some really long calculation th...
Best way to select random rows PostgreSQL
... @Awesome-o: The goal is to retrieve 1000 rows, I start with an extra 10 % to compensate for a few gaps or (unlikely but possible) duplicate random numbers ... the explanation is in my answer.
– Erwin Brandstetter
Feb 24 '14 at 12:53
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Generating an MD5 checksum of a file
...turn hash_md5.hexdigest()
Note: hash_md5.hexdigest() will return the hex string representation for the digest, if you just need the packed bytes use return hash_md5.digest(), so you don't have to convert back.
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Why can't variables be declared in a switch statement?
...istency in the code. In the old days, you might have automatically got an "extra" stack frame, but now that should not be the case for any decent optimizing compiler.
– Tall Jeff
Sep 18 '08 at 14:37
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What is a proper naming convention for MySQL FKs?
...--------------+-----------------------+------------------------+
If this extra step isn't too much for you, then you should be able to easily find the fk you are looking for.
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What does the thread_local mean in C++11?
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this would mess it up: while (something) { char *next = strtok(whatever); someFunction(next); // someFunction calls strtok }
– japreiss
Jun 25 '14 at 20:18
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Which encoding opens CSV files correctly with Excel on both Mac and Windows?
...king good with special characters and separated fields. I start my output string with "\ufeff" as a byte order mark (BOM), then using "\t" tabs in place of commas for field separation, and encoding the file with "utf-16LE". Works like a charm, thanks to this page!
– Geek Stoc...
Printing everything except the first field with awk
...for loop:
awk '{for (i=2; i<=NF; i++) print $i}' filename
So if your string was "one two three", the output will be:
two
three
If you want the result in one row, you could do as follows:
awk '{for (i=2; i<NF; i++) printf $i " "; print $NF}' filename
This will give you: "two three"
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Checkout another branch when there are uncommitted changes on the current branch
...ash ID of each file. So Git can compare hash IDs—currently 160-bit-long strings—to decide if commits X and Y have the same file or not. It can then compare those hash IDs to the hash ID in the index, too.
This is what leads to all the oddball corner cases above. We have commits X and Y that ...