lambda

问题 I've created some sample code below, and am trying to use a lambda expression to query against the SoftwareComponents Dictionary. The problem is that the query returns a var of type IGrouping, when what I need to do is further refine the query so that it returns a type of IGrouping where the first string is the SoftwareComponent.ComponentName, and the second string is the SoftwareComponent.ComponentDescription. Anyone know how to do this? I was hoping the data returned would look something

问题 I've created some sample code below, and am trying to use a lambda expression to query against the SoftwareComponents Dictionary. The problem is that the query returns a var of type IGrouping, when what I need to do is further refine the query so that it returns a type of IGrouping where the first string is the SoftwareComponent.ComponentName, and the second string is the SoftwareComponent.ComponentDescription. Anyone know how to do this? I was hoping the data returned would look something

问题 When I start new thread in traditional constructor, NetBeansIDE gives no warnings: addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { (new SomeThread()).start(); } }); But if I convert it to Lambda expression, I'm getting a warning "Starting new Thread in constructor": addActionListener((ActionEvent e) -> { (new SomeThread()).start(); }); What is the problem here? What is the correct solution? EDIT 1: The same problem on NetBeans IDE 8.0.2: The

问题 I have the following code: DialogInterface.OnClickListener closeOnOkClickListener = new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { switch (which){ case DialogInterface.BUTTON_POSITIVE: finish(); break; } } }; And I am trying to convert this to a lambda expression but I cannot do it. Is it possible? How? 回答1: It is possible. Every interface which just got one non-default method is an FunctionalInterface . The annotation is just for

问题 This question already has answers here : Is it possible to use Java 8 for Android development? (26 answers) Closed 5 years ago . Does IntelliJ Android Studio last update (From 30/Jan/2016) supports Java 8? I used a lambda expression mButton.setOnClickListener((View v) -> { // do something here }); then Android Studio tells me I have an error and when I resolve the problem (Alt+spacebar) I choose the Change to Java 8 (or something like that) and it works the lambda but the libraries from

问题 This question already has answers here : Is it possible to use Java 8 for Android development? (26 answers) Closed 5 years ago . Does IntelliJ Android Studio last update (From 30/Jan/2016) supports Java 8? I used a lambda expression mButton.setOnClickListener((View v) -> { // do something here }); then Android Studio tells me I have an error and when I resolve the problem (Alt+spacebar) I choose the Change to Java 8 (or something like that) and it works the lambda but the libraries from

问题 I'm looking for a way to temporarily disable Lambda triggers on a DynamoDB. I want to be able do apply manual Updates on a table (e.g. such as importing data from a S3 backup) without the Lambda code being triggers. I tried the disable button next to the trigger in the lambda functions "Trigger" tab. I also tried to disable the whole Stream for the table. In both cases, when reactivating the trigger/stream all the trigger events (that happened, while they were deactivated) are executed then.

问题 I'm looking for a way to temporarily disable Lambda triggers on a DynamoDB. I want to be able do apply manual Updates on a table (e.g. such as importing data from a S3 backup) without the Lambda code being triggers. I tried the disable button next to the trigger in the lambda functions "Trigger" tab. I also tried to disable the whole Stream for the table. In both cases, when reactivating the trigger/stream all the trigger events (that happened, while they were deactivated) are executed then.

问题 I'm creating a .component bundle on MacOSX with xCode 7. I'm trying to get rid of all debugging symbols and library symbols for release configuration. I set all suitable options in xCode (like Strip Debug Symbols , Strip style to all symbols , symbols hidden by default etc.) Unfortunately there are still some symbols visible in compiled and linked component file. So I use strip -x -S mybundle.component to remove them externally. And it almost work but not for lambdas callers. If any of method

问题 I have a lambda expression like below. What I want to ask is Is there any easy way or best practice for casting method parameter? results.forEach( (result) -> { ((JSONObject)result).put("test", "test"); ((JSONObject)result).put("time", System.currentTimeMillis()); otherList.add(((JSONObject)result)); } ); When I try to change input type like (JSONObject result) -> I am getting below error; incompatible types: Consumer<JSONObject> cannot be converted to Consumer<? super Object> 回答1: The error