sample

When running the sample after creating google-service.json, the app crashes when trying to get database reference in SignInActivity mDatabase = FirebaseDatabase.getInstance().getReference(); Crash log 05-21 09:27:27.644 488-488/com.google.firebase.quickstart.database D/AndroidRuntime: Shutting down VM 05-21 09:27:27.644 488-488/com.google.firebase.quickstart.database E/AndroidRuntime: FATAL EXCEPTION: main Process: com.google.firebase.quickstart.database, PID: 488 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.google.firebase.quickstart.database/com.google.firebase

I am trying to pull a random sample of a population from a Peoplesoft Database. The searches online have lead me to think that the Sample Clause of the select statement may be a viable option for us to use, however I am having trouble understanding how the Sample clause determines the number of samples returned. I have looked at the oracle documentation found here: http://docs.oracle.com/cd/E11882_01/server.112/e26088/statements_10002.htm#i2065953 But the above reference only talks about the syntax used to create the sample. The reason for my question is I need to understand how the sample

Say i have a dataframe with 100,000 entries and want to split it into 100 sections of 1000 entries. How do i take a random sample of say size 50 of just one of the 100 sections. the data set is already ordered such that the first 1000 results are the first section the next section the next and so on. many thanks You can use the sample method*: In [11]: df = pd.DataFrame([[1, 2], [3, 4], [5, 6], [7, 8]], columns=["A", "B"]) In [12]: df.sample(2) Out[12]: A B 0 1 2 2 5 6 In [13]: df.sample(2) Out[13]: A B 3 7 8 0 1 2 * On one of the section DataFrames. Note: If you have a larger sample size that

Is it possible to set up the Android Bluetooth Chat sample app to connect more than one person at a time, and have a mini chat room? What would that entail? tl;dr version: Bluetooth sucks for this, don't use it, use wifi instead, probably backed by a web backend. I have investigated this issue thoroughly throughout the years in the interests of a social wireless network research project. My general advice is: it doesn't work with more than two / three people. Bluetooth just isn't designed with wireless peer to peer networks in mind. In general, it seems that the cheap Bluetooth controllers

I just installed the Nfc Demo from google, but it doesn´t read the information from the Tag.-> It just provides some fakeTag information. Has anybody an idea, where I can change the sample to read from the nfc Tag? Or has somebody a working nfc demo for the nexus? If we could bring a nfc demo to work, many people would have the possibility to develop a nfc demo on their own. Best regards Alexander I had the same problem getting tag id. I got some B@2346323143 style data to screen. I got it to work like this: byte[] byte_id = intent.getByteArrayExtra(NfcAdapter.EXTRA_ID); You need to convert

How is it/(or just "is it?") possible to create a Web Component that can be placed inside a form and act just as any input element, that's sent to the server on submit? In other words, can Web Components be used to create custom input elements? Use the following browser configuration options before testing: Chrome: about:flags => Enabled Experimental WebKit Features/Enable Experimental Web Platform Firefox: about:config => dom.registercomponents.enabled to enable document.registerElement . Use the extends parameter of document.registerElement to extend a native input element: /* Cross-browser

I'm trying to implement the navigation drawer pattern based on my app. I downloaded the sample code from here and i ran it and 90 % of the times the drawer works ok, but sometimes the drawer gets stuck when i try to open it. I have a way of replicating the situation but it doesn't always work. What i do is: 1- Run the sample code as is. 2- Put your finger on the left edge to get the drawer peek 3- Let go of the finger and press it on the main fragment 4- Try to open the drawer as usual Sometimes the drawer gets stuck on the peek mode no matter how much you swipe your finger to the right to

I need to run two instances of AudioTrack at the same time. They must run separately because I'm playing them at different, variable sample rates. I found that if I run them in the same thread, they "take turns". I'm running them each in their own thread, but the audio is stuttering. Any ideas on making two instances play nice? If not, any tips on mixing two short buffers into one, even if I want to play them at different sample rates. I have 4 audioTracks playing at once and they seem to play fine. Testing on HTC Desire 1.1ghz OC. I get glitches with the threading sometimes though.