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To ARC or not to ARC? What are the pros and cons? [closed]
...bases. Some of my projects run on 10.4, so I still do a lot of Objective-C 1.0 work (so no @synthesize, let alone ARC). But you get used to switching modes pretty well.
– Rob Napier
Jan 6 '12 at 17:31
...
Can dplyr package be used for conditional mutating?
...ain IMHO.
Here's a benchmark on relatively bigger data:
# R version 3.1.0
require(data.table) ## 1.9.2
require(dplyr)
DT <- setDT(lapply(1:6, function(x) sample(7, 1e7, TRUE)))
setnames(DT, letters[1:6])
# > dim(DT)
# [1] 10000000 6
DF <- as.data.frame(DT)
DT_fun <- functio...
How to create a Custom Dialog box in android?
...I have created a simple Dialog, like:
custom_dialog.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="80dp"
android:background="#3E80B4"
android:orien...
Java EE web development, where do I start and what skills do I need? [closed]
... covers that. Thus do definitely not pick an old book for Java EE 5 or JSF 1.0 or so while there's currently already Jakarta EE 8 and JSF 2.3 available.
Last but not least, please ignore code snippet scraping sites maintained by amateurs with primary focus on advertisement income instead of on teach...
How to make an Android Spinner with initial text “Select One”?
... this));
contact_spinner_row_nothing_selected.xml
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/text1"
style="?android:attr/spinnerItemStyle"
android:singleLine="true"
android:layout...
how do I initialize a float to its max/min value?
...549e-38 but the smallest representable subnormal float is nextafterf(0.0f, 1.0f) == 1.4013e-45f.
– nibot
May 19 '15 at 19:13
...
Microsoft Roslyn vs. CodeDom
...nd (somewhat) langage agnostic way to generate code that was added in .NET 1.0 to support designers (a la WinForms). Because CodeDom was an attempt at providing a unified model that can generate code in C#, VB, and other languages, it lacks high fidelity with any of the languages that it supports (t...
Best approach to real time http streaming to HTML5 video client
...o the icecast server. Example pipeline (only video, no audio):
gst-launch-1.0 rtspsrc location=rtsp://192.168.1.234:554 user-id=admin user-pw=123456 ! rtph264depay ! avdec_h264 ! vp8enc threads=2 deadline=10000 ! webmmux streamable=true ! shout2send password=pass ip=<IP_OF_ICECAST_SERVER> por...
How to specify maven's distributionManagement organisation wide?
...') generically for all projects from your organization.
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v...
John Carmack's Unusual Fast Inverse Square Root (Quake III)
...ulates the inverse square root of a float, 4x faster than regular (float)(1.0/sqrt(x)) , including a strange 0x5f3759df constant. See the code below. Can someone explain line by line what exactly is going on here and why this works so much faster than the regular implementation?
...