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MySQL integer field is returned as string in PHP
...ou select data from a MySQL database using PHP the datatype will always be converted to a string. You can convert it back to an integer using the following code:
$id = (int) $row['userid'];
Or by using the function intval():
$id = intval($row['userid']);
...
Is unsigned integer subtraction defined behavior?
...he result of the addition is unsigned int. Then that result is implicitly converted to the type required in context, a conversion which fails because the value is not representable in the new type.
– Ben Voigt
Oct 14 '15 at 3:20
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Sort a single String in Java
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No there is no built-in String method. You can convert it to a char array, sort it using Arrays.sort and convert that back into a String.
String test= "edcba";
char[] ar = test.toCharArray();
Arrays.sort(ar);
String sorted = String.valueOf(ar);
Or, when you want to dea...
How does type Dynamic work and how to use it?
...It is correct, scala.Dynamic doesn't have any members, it is just a marker interface - the concrete implementation is filled-in by the compiler. As for Scalas String Interpolation feature there are well defined rules describing the generated implementation. In fact, one can implement four different ...
Why do Python's math.ceil() and math.floor() operations return floats instead of integers?
...vident in your comment:
The whole point of ceil/floor operations is to convert floats to integers!
The point of the ceil and floor operations is to round floating-point data to integral values. Not to do a type conversion. Users who need to get integer values can do an explicit conversion fo...
How can I read large text files in Python, line by line, without loading it into memory?
...approximately) that size (in bytes). A negative buffering means to use the system default, which is usually line buffered for tty devices and fully buffered for other files. If omitted, the system default is used
– jyoti das
Apr 19 '18 at 5:26
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How do I prevent an Android device from going to sleep programmatically?
...e a wake lock. Example from the docs:
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, "My Tag");
wl.acquire();
// screen and CPU will stay awake during this section
wl.release();
There's also ...
Get the IP address of the machine
...nd should be the same below.
I've done a quick example below which will print all of the machine's IPv4 address, (you should also check the getifaddrs was successful ie returns 0).
I've updated it show IPv6 addresses too.
#include <stdio.h>
#include <sys/types.h>
#include <if...
How often does python flush to a file?
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For file operations, Python uses the operating system's default buffering unless you configure it do otherwise. You can specify a buffer size, unbuffered, or line buffered.
For example, the open function takes a buffer size argument.
http://docs.python.org/library/func...
Installing R on Mac - Warning messages: Setting LC_CTYPE failed, using “C”
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In my system (OS X 10.11 El Capitán) I have environment variables LANG and LC_ALL set to en_US.UTF-8 for my terminal (in the ~/.bash_profile file), and command line R does not display those warning messages; but R Studio does. Fo...