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问题 I'm trying to deploy an ember app to AWS CloudFront using ember-cli-deploy and ember-cli-deploy-cloudfront. I set up my bucket and user in AWS, gave my user AmazonS3FullAccess policy. Set up my .env.deploy.production file to look like this: AWS_KEY=<my key> AWS_SECRET=<my secret> PRODUCTION_BUCKET=<app.<my domain>.com PRODUCTION_REGION=us-east-1 PRODUCTION_DISTRIBUTION=<my cloudfront distribution id> My config/default.js looks like this: /* jshint node: true */ module.exports = function

问题 I'm trying to deploy an ember app to AWS CloudFront using ember-cli-deploy and ember-cli-deploy-cloudfront. I set up my bucket and user in AWS, gave my user AmazonS3FullAccess policy. Set up my .env.deploy.production file to look like this: AWS_KEY=<my key> AWS_SECRET=<my secret> PRODUCTION_BUCKET=<app.<my domain>.com PRODUCTION_REGION=us-east-1 PRODUCTION_DISTRIBUTION=<my cloudfront distribution id> My config/default.js looks like this: /* jshint node: true */ module.exports = function

问题 The If statement and any other boolean comparison is smart enought to stop at first FALSE value when evaluating A and B and C and D and at first TRUE value when evaluating A or B or C or D . What is the name of this behavior? Is this a compiler optimization? If so, there is a way to disable it with some compiler directive? 回答1: This is called 'boolean short-circuit evaluation', a form of 'lazy evaluation'. You can tell the compiler either to use or not to use this feature using compiler

问题 I don't understand why the following code produces an error. Normally I can figure things out from the language specification, but in this case I don't understand the language specification. This isn't causing problems in my code, by the way, I just want to understand the language. Example: bool success; try { success = true; } catch { success = false; } finally { Console.WriteLine(success); // ERROR: Local variable 'success' might not be initialized before accessing } This behavior appears

问题 I am having a read issue in Fortran 90. I am attempting to read 31488 rows of data. I am using the Portland Group Fortran 90 compiler. My error message is this: PGFIO-F-217/list-directed read/unit=14/attempt to read past end of file. File name = /import/c/w/username/WRFV3/SKILLSETS/Overestimations.txt formatted, sequential access record = 31489 The Fortran program thinks that I have an extra row. I do not know where that is indicated in the code. I have attached the relevant part of the code.

问题 I want to automate rsyncing, and tried the following code: TARGET="/media/USB\ DISK/Backup/" rsync -av --delete ~/Data ${TARGET} but the execution results in the following error: rsync: link_stat "/media/USB\" failed: No such file or directory (2) rsync: mkdir "/home/DISK/BACKUP" failed: No such file or directory (2) because of the 'space' in the target filename. However, when I echo the command I can use that to run on the shell directly. How to do it correctly (which brackets, with

问题 I'm trying to modify and write some video using openCV 2.4.6.1 using the following code: cv::VideoCapture capture( video_filename ); // Check if the capture object successfully initialized if ( !capture.isOpened() ) { printf( "Failed to load video, exiting.\n" ); return -1; } cv::Mat frame, cropped_img; cv::Rect ROI( OFFSET_X, OFFSET_Y, WIDTH, HEIGHT ); int fourcc = static_cast<int>(capture.get(CV_CAP_PROP_FOURCC)); double fps = 30; cv::Size frame_size( RADIUS, (int) 2*PI*RADIUS ); video

问题 I have this table : <div class="table-container"> <table mat-table [dataSource]="dataSource"> <mat-divider></mat-divider> <!-- title column --> <ng-container matColumnDef="title"> <th mat-header-cell *matHeaderCellDef> {{ 'NOTIFYCATION.NOTIFY_TITLE' | translate }} </th> <td mat-cell *matCellDef="let element"> {{element.title}} </td> </ng-container> <!-- code column --> <ng-container matColumnDef="description"> <th mat-header-cell *matHeaderCellDef> {{ 'NOTIFYCATION.DESCRIPTION' | translate }}

问题 I have this table : <div class="table-container"> <table mat-table [dataSource]="dataSource"> <mat-divider></mat-divider> <!-- title column --> <ng-container matColumnDef="title"> <th mat-header-cell *matHeaderCellDef> {{ 'NOTIFYCATION.NOTIFY_TITLE' | translate }} </th> <td mat-cell *matCellDef="let element"> {{element.title}} </td> </ng-container> <!-- code column --> <ng-container matColumnDef="description"> <th mat-header-cell *matHeaderCellDef> {{ 'NOTIFYCATION.DESCRIPTION' | translate }}

问题 Edge doesn't support CSS mask, yet the @supports statement below is calculating as true and the enclosed styles are being applied in Edge. What can I put into the @supports argument to get Edge to ignore the conditional block body { font-family: monospaced; color: red; background-image: url(test.png); } @supports(mask: url("")) { body { background-color: #eee; font-family: sans-serif; color: rebeccapurple; mask: url(test.svg); mask-size: cover; } } <h3>This should be red and mono-spaced in