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How to redirect the output of the time command to a file in Linux?
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{ time sleep 1 2> sleep.stderr ; } 2> time.txt
which puts STDERR from "sleep" into the file "sleep.stderr" and only STDERR from "time" goes into "time.txt"
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OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection
...? there is an app called SayText where this detection happens in real-time from a video stream. This code would be impractical for real-time, am I right?
– alandalusi
Nov 27 '12 at 17:34
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How do I execute inserts and updates in an Alembic upgrade script?
...0:06.784170
"""
revision = '169ad57156f0'
down_revision = '29b4c2bfce6d'
from alembic import op
import sqlalchemy as sa
from sqlalchemy import orm
from sqlalchemy.ext.declarative import declarative_base
Base = declarative_base()
class Player(Base):
__tablename__ = 'players'
id = sa.Col...
Android: Want to set custom fonts for whole application not runtime
...t in every control of the application? And not necessarily runtime ? (i.e. from xml if possible or only once for whole application in JAVA file)
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Format date in a specific timezone
...f a JSON object, my backend server sends dates as a number of milliseconds from the UTC epoch (Unix offset).
7 Answers
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Truststore and Keystore Definitions
... with their corresponding public keys.
A truststore contains certificates from other parties that you expect to communicate with, or from Certificate Authorities that you trust to identify other parties.
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How to download image from url
Is there a way to download an image directly from a url in c# if the url does not have an image format at the end of the link? Example of url:
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Xcode 4 says “finished running ” on the targeted device — Nothing happens
...ng to support devices that run armv6 (e.g. the iPhone 3G).
Delete armv7 from the 'Required device capabilities' in yourProjectName-Info.plist
You may also need to change the build settings to compile with armv6 instead of armv7.
This is the default:
Double click on 'Standard (armv7)' to ad...
Remove last character from string. Swift language
How can I remove last character from String variable using Swift? Can't find it in documentation.
22 Answers
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How can I count the number of matches for a regex?
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Solution for Java 8 and older
You'll have to do the following. (Starting from Java 9, there is a nicer solution)
int count = 0;
while (matcher.find())
count++;
Btw, matcher.groupCount() is something completely different.
Complete example:
import java.util.regex.*;
class Test {
public...