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How do I list all the columns in a table?
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For Oracle (PL/SQL)
SELECT column_name
FROM user_tab_cols
WHERE table_name = 'myTableName'
For MySQL
SHOW COLUMNS FROM table_name
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Xcode 4 - “Archive” is greyed out?
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You have to select the device in the schemes menu in the top left where you used to select between simulator/device. It won’t let you archive a build for the simulator.
Or you may find that if the iOS device is already selected the ar...
Best practice multi language website
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It's getting harder and harder to select the best answer, currently there are about 3/4 answers that deserve at least a part of the bounty each. Combined they become a solid answer to everything I wanted to clear up together :)
– Joshua ...
How to read a (static) file from inside a Python package?
...lidtk
├── lidtk
│ ├── analysis
│ │ ├── char_distribution.py
│ │ └── create_cm.py
│ ├── classifiers
│ │ ├── char_dist_metric_train_test.py
│ │ ├── char_features.py
│ │ ├── cld2
│...
How to convert byte array to string and vice versa?
...r UTF-8 encoding
There are a bunch of encodings you can use, look at the Charset class in the Sun javadocs.
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RegEx to make sure that the string contains at least one lower case char, upper case char, digit and
What is the regex to make sure that a given string contains at least one character from each of the following categories.
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How to convert a Title to a URL slug in jQuery?
...i=0, l=from.length ; i<l ; i++) {
str = str.replace(new RegExp(from.charAt(i), 'g'), to.charAt(i));
}
str = str.replace(/[^a-z0-9 -]/g, '') // remove invalid chars
.replace(/\s+/g, '-') // collapse whitespace and replace by -
.replace(/-+/g, '-'); // collapse dashes
return str...
“#include” a text file in a C program as a char[]
... use it like so
$ echo hello world > a
$ xxd -i a
outputs:
unsigned char a[] = {
0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x77, 0x6f, 0x72, 0x6c, 0x64, 0x0a
};
unsigned int a_len = 12;
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Get the IP address of the machine
... <string.h>
#include <arpa/inet.h>
int main (int argc, const char * argv[]) {
struct ifaddrs * ifAddrStruct=NULL;
struct ifaddrs * ifa=NULL;
void * tmpAddrPtr=NULL;
getifaddrs(&ifAddrStruct);
for (ifa = ifAddrStruct; ifa != NULL; ifa = ifa->ifa_next) {
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How to Store Historical Data
...erform an insert statement into FOO_Hist similar to: insert into FOO_HIST select * from FOO where id = @id .
13 Answers
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