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start: str=begin
inner: str=outer
end: str=begin

defHLT

Rich Already Answered That!

A list of commonly asked questions, design decisions, reasons why Clojure is the way it is as they were answered directly by Rich (even when from many years ago, those answers are pretty much valid today!). Feel free to point friends and colleagues here next time they ask (again). Answers are pasted verbatim (I've made small adjustments for readibility, but never changed a sentence) from mailing lists, articles, chats. The link below jumps at the answer in this file, the link on the question points back at the original post.

Index:

• Why no pattern matching?
• Why no tail call optimization?
• Why you don't accept pull requests?

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(use 'clojure.core.async)

(defprotocol ISendable
  (channel [this]))

(defn async-agent [state]
  (let [c (chan Long/MAX_VALUE) ;; <<-- unbounded buffers are bad, but this matches agents
        a (atom state)]
    (go-loop []
             (when-let [[f args] (<! c)]

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# Solution found here: http://stackoverflow.com/questions/134882/undoing-a-git-rebase

# The easiest way would be to find the head commit of the branch as it was immediately before the rebase started in the reflog...
git reflog
# and to reset the current branch to it (with the usual caveats about being absolutely sure before reseting with the --hard option).

# Suppose the old commit was HEAD@{5} in the ref log
git reset --hard HEAD@{5}

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public class BetterRecyclerView extends RecyclerView{
  private static final int INVALID_POINTER = -1;
  private int mScrollPointerId = INVALID_POINTER;
  private int mInitialTouchX, mInitialTouchY;
  private int mTouchSlop;
  public BetterRecyclerView(Context context) {
    this(context, null);
  }

  public BetterRecyclerView(Context context, @Nullable AttributeSet attrs) {

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(ns clj-spec-playground
  (:require [clojure.string :as str]
            [clojure.spec :as s]
            [clojure.test.check.generators :as gen]))

;;; examples of clojure.spec being used like a gradual/dependently typed system.

(defn make-user
  "Create a map of inputs after splitting name."
  ([name email]

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public class BadgeUtils {


    public static void setBadge(Context context, int count) {
        setBadgeSamsung(context, count);
        setBadgeSony(context, count);
    }

    public static void clearBadge(Context context) {
        setBadgeSamsung(context, 0);

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package com.firebase.client;

import com.firebase.client.core.Constants;
import rx.Observable;
import rx.Subscriber;
import rx.functions.Action0;
import rx.functions.Func1;
import rx.subscriptions.Subscriptions;

public class RxFirebase {

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import android.media.AudioManager;
import android.media.MediaPlayer;
import android.util.Pair;
import org.jetbrains.annotations.NotNull;
import java.io.File;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import rx.Observable;
import rx.subscriptions.Subscriptions;

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package rx.android.observables;

import rx.Observable;
import rx.Observable.OnSubscribe;
import rx.Subscriber;
import rx.android.subscriptions.AndroidSubscriptions;
import rx.functions.Action0;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;