在回复HTTP请求后忘记写return 在编写HTTP处理程序时,容易在已经回复HTTP请求后忘记返回语句。这可能会导致奇怪的事情产生,我们期望在发生错误后停止处理程序,然而实际中并没有停止。...修复上述问题方法很简单,就是在执行完http.Error之后添加return语句。由于有return语句,如果执行逻辑进入到if err != nil之后,函数将停止执行。...= nil { http.Error(w, "foo", http.StatusInternalServerError) return...我们需要牢记http.Error不会停止处理程序的执行,必须手动添加return 语句。不过如果程序有好的单元测试覆盖率,这种问题比较容易发现,这也说明了单测的重要性。
通过用 if/return 替换 if/else来减少过多的缩进 尽量减少方法(或函数)中“干或”代码的缩进。 错误处理是“噪音”。...result = x } else { if () { result = y } else { result = z } } return...(result变量)可能会被错误地修改 (间接)鼓励了一个或多个if/else 示例: if/else 重构 我们来看一下下面这段典型的node回调代码: function(err, results)...像上面这种情况就可以重构为如下代码:去掉 else, 减少一层缩进。在 if里直接 return。...这样写的另一个好处是: return关键字会被高亮。与多个 result=something相比,这样做 return一目了然。
a else b’ instead of ‘b if not a else a’ (example) SIM220: Use ‘False’ instead of ‘a and not a’ (example...want to check if "except" happened return return_value SIM108 # Bad if a: b = c else: b =..." elif a == "boo": return "ooh" else: return 42 # Good mapping = {"foo": "bar", "bar": "baz"...False # Good bool(a) SIM211 # Bad False if a else True # Good not a SIM212 # Bad b if not a else a...to SIM121 after its 6-month trial period is over.
{ for (;;) { Node t = tail; node.setPrevRelaxed(t); // avoid unnecessary...= 0) break; // else interrupted after signal } else if ((node.status...{ try { if (rejected) node.block(); else...* * @param node the node * @return savedState to reacquire after wait */ private int enableWait(...缓存状态用于恢复 int savedState = getState(); if (release(savedState))//AQS.release释放锁 return
As a lazy boy, he cannot tolerate chasing the cattles all the time to avoid unnecessary omission....Output For each test case, please output one number rounded to 2 digits after the decimal point representing...{ 9 double temp=(a[0]*b[1]+a[1]*c[0]+b[0]*c[1])-(c[0]*b[1]+b[0]*a[1]+a[0]*c[1]); 10 return...} 35 if(n<3||ans<1e-4||ans==maxn) 36 printf("Impossible\n"); 37 else...38 printf("%.2lf\n",ans); 39 } 40 return 0; 41 }
print answer elif args.verbose: print "{} to the power {} equals {}".format(args.x, args.y, answer) else...parser) description - Text to display before the argument help (default: none) epilog - Text to display after...arguments (default: None) conflict_handler - The strategy for resolving conflicting optionals (usually unnecessary...parser) description - Text to display before the argument help (default: none) epilog - Text to display after...arguments (default: None) conflict_handler - The strategy for resolving conflicting optionals (usually unnecessary
This component achieves this by * removing any lagging nodes from the cluster after a timeout. */ public...LogManager.getLogger(LagDetector.class); // the timeout for each node to apply a cluster state update after...version {} but this node's version is not being tracked", discoveryNode, appliedVersion); } else...if (laggingTrackers.isEmpty()) { logger.trace("lag detection for version {} is unnecessary...: {}", version, appliedStateTrackersByNode.values()); } else { logger.debug("starting
implements TextWatcher { public void beforeTextChanged(CharSequence s, int start, int count, int after...type |= InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD; } else { // Masked...password character string // For the case password is not saved, return null return...return "hirake5ma"; } 在虚拟显示的情况下,当密码显示选项打开时,请清除显示的内容。...TextWatcher { public void beforeTextChanged(CharSequence s, int start, int count, int after
This component achieves this by * removing any lagging nodes from the cluster after a timeout. */ public...LogManager.getLogger(LagDetector.class); // the timeout for each node to apply a cluster state update after...version {} but this node's version is not being tracked", discoveryNode, appliedVersion); } else...if (laggingTrackers.isEmpty()) { logger.trace("lag detection for version {} is unnecessary...: {}", version, appliedStateTrackersByNode.values()); } else { logger.debug("starting
They are higher-order functions that take a function and return another function....func() print("Something after the function.")...return wrapper@my\_decoratordef say\_hello(): print("Hello!")say\_hello()3....__new__(cls) return cls._instance11....= nil { return fmt.Errorf("failed to process: %v", err)}Integration of Go with DockerGo's compiled
. // Inlining works best for functions with parameters of functional types return this !...{ public String from; } public TimelineRequest getTimelineRequest() { return...{ //Unchecked cast: Any to T @Suppress("UNCHECKED_CAST") return this as?...{ return if (this is T) { this } else { null } } WHEN_ENUM_CAN_BE_NULL_IN_JAVA...(message: String) { @Suppress("UNNECESSARY_SAFE_CALL") println(message?.
In addition to * unnecessary resources (such as memory and instances of codecs) * being held...instances * of the same codec are supported, some performance degradation * may be expected when unnecessary...= NULL) { // this prevents native callbacks after the object is released mp->setListener
this.deleteRow.bind(this); this.deleteRow(id,e)}>Delete Row /* event is unnecessary... Activate Lasers Another difference is that you cannot return... Click me In React, this...using React you should generally not need to call addEventListener to add listeners to a DOM element after...prevState.isToggleOn })); } render(){ return ( /
containerID, containerSpec, gracePeriod) } // always give containers a minimal shutdown window to avoid unnecessary...= nil { logrus.Infof("Container failed to stop after sending signal %d to the process, force killing...= nil { logrus.Infof("Container failed to stop after sending signal %d to the process, force killing...but it is possible there is a case where we hit here before the exit event is processed // but after...= nil { daemon.handleContainerExit(container, nil) } }() } else { return errors.Wrapf
function area (s: Square | Rectangle | Circle): number { switch (s.kind) { case "square": return...s.size * s.size; case "rectangle": return s.height * s.width; case "circle": return...from which all methods that modify it are removed, so you can be sure that such arrays will notchange after...Properties Object literals are processed by it in a special way and are checked for the presence of unnecessary...result > -1; } The function parameters are checked one after the other,and the parameter types that
dotnet_style_parentheses_in_other_binary_operators = always_for_clarity:silent dotnet_style_parentheses_in_other_operators = never_if_unnecessary...flush_left csharp_indent_switch_labels = true csharp_new_line_before_catch = true csharp_new_line_before_else...= false csharp_space_after_colon_in_inheritance_clause = true csharp_space_after_keywords_in_control_flow_statements...new line options #place catch statements on a new line csharp_new_line_before_catch = true #place else...statements on a new line csharp_new_line_before_else = true #require finally statements to be on a new
the device is still doing work in the stream when cudaStreamDestroy() is called, the function will return...parameters (see Events for a description of events)and makes all the commands added to the given stream after...The stream can be 0, in which case all the commands added to any stream after the call tocudaStreamWaitEvent...To avoid unnecessary slowdowns, all these synchronization functions are usually best used for timing...这东西在OpenCL里叫barrier To avoid unnecessary slowdowns, all these synchronization functions are usually best
} return 1; } return fullTryAcquireShared(current); }...= current) return -1; } else if (readerShouldBlock()) {...= getThreadId(current)) rh = readHolds.get(); else...indicated by caller, * or was recorded (as h.waitStatus either before * or after...it appears null * * The conservatism in both of these checks may cause * unnecessary
Patterns to avoid bad performance Avoid blocking main Thread Avoid unnecessary invalidations that may...LinearLayouts ( Cz each child needs to be measured twice) Avoid Customs views not properly made Avoid Creating Unnecessary...layout (avoid extra ViewGroups on inflation) include tag (easy code reuse of common layouts) Avoid unnecessary...layouts Don’t make allocations or heavy operations in OnDraw Remove unnecessary calls to invalidate(...Then the RAM used by the service can’t be used by anything else or paged out The best way to limit the
You will understand it easier after this example....Image 2 is how the enabled button looks after applying the new display list but as you can see, this...After the display list is executed, we are in the image 3 and it seems that there is something wrong...To avoid this kind of problems we should create flat layouts without unnecessary layouts that don’t...This way we won’t loose time recreating and executing unnecessary display lists.
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