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How large should my recv buffer be when calling recv in the socket library
...old the largest individual message / command you would reasonably expect (3000 is likely fine). If your protocol is transferring bulk data, then larger buffers can be more efficient - a good rule of thumb is around the same as the kernel receive buffer size of the socket (often something around 256...
Get the first element of each tuple in a list in Python [duplicate]
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Use a list comprehension:
res_list = [x[0] for x in rows]
Below is a demonstration:
>>> rows = [(1, 2), (3, 4), (5, 6)]
>>> [x[0] for x in rows]
[1, 3, 5]
>>>
Alternately, you could use unpacking instead of x[0]:
res_list = [x for...
How to reset postgres' primary key sequence when it falls out of sync?
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edited Sep 20 '17 at 2:03
Craig Ringer
242k5353 gold badges539539 silver badges643643 bronze badges
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npm ERR cb() never called
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320
If you have npm version 5 or above, try this first:
$ sudo npm cache verify
Otherwise:
$ sud...
maven-dependency-plugin (goals “copy-dependencies”, “unpack”) is not supported by m2e
...rtifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<!-- copy-dependency plugin -->
<pluginE...
Put icon inside input element in a form
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406
The site you linked uses a combination of CSS tricks to pull this off. First, it uses a backgr...
Android: how to check if a View inside of ScrollView is visible?
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Rich SchulerRich Schuler
40.1k66 gold badges6868 silver badges5858 bronze badges
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Stacking DIVs on top of each other?
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170
Position the outer div however you want, then position the inner divs using absolute. They'll a...
How can I use a DLL file from Python?
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160
For ease of use, ctypes is the way to go.
The following example of ctypes is from actual code I...
android get all contacts
... null, null, null, null);
if ((cur != null ? cur.getCount() : 0) > 0) {
while (cur != null && cur.moveToNext()) {
String id = cur.getString(
cur.getColumnIndex(ContactsContract.Contacts._ID));
String name = cur.getString(cur...